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Made available in DSpace on 2021-06-25T10:51:07Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-04-01 Introduction/Objective: The aim of this study is to analyze the influence of sour taste and cold temperature in the initiation of the pharyngeal swallow (IPS) and bolus location at pharyngeal swallow onset in individuals after stroke. Methods: Cross-sectional prospective study. The study included 52 individuals with unilateral ischemic stroke. Each individual was assessed by videofluoroscopic swallowing study with 5ml of paste bolus offering four different stimuli (natural, cold, sour, and sour-cold). The individuals were divided into two groups according to the offer sequence. Group 1 (G1) – received a randomized sequence of stimuli (24 individuals), and Group 2 (G2) –the stimuli were offered in the following order: natural, cold, sour, and sour-cold(28 individuals). The IPS time and bolus location at pharyngeal swallow onset were analyzed. The bolus location at pharyngeal swallow onset was defined using six different levels. Results: Individuals in G1 did not show a significant difference in IPS time between stimuli. However, individuals in G2 presented a significantly shorter IPS time with the sour and sour-cold stimuli than with natural or cold stimuli. The bolus location at pharyngeal swallow onset did not show significant difference between stimuli in both groups. On the other hand, in the G2 it was observed higher frequency of swallowing with sour-cold stimulus at level 1 (the bolus head was located in any region between the fauces pillar and the point where the tongue crosses the inferior border of the mandible). Conclusion: The sour and sour-cold stimuli influenced the IPS time when they were offered in a sequential order. Moreover, both the IPS time and bolus location at pharyngeal swallow onset were not influenced by the sour and sour cold-bolus when offered in a random sequence. Department of Neurology and Psiquiatry Sao Paulo State University-UNESP Department of Medicine Marilia University - UNIMAR Department of Speech and Language Therapy Sao Paulo State University - UNESP Department of Surgery Sao Paulo State University - UNESP Department of Neurology and Psiquiatry Sao Paulo State University-UNESP Department of Speech and Language Therapy Sao Paulo State University - UNESP Department of Surgery Sao Paulo State University - UNESP

Made available in DSpace on 2015-02-24T13:58:06Z (GMT). No. of bitstreams: 0 Previous issue date: 2012Bitstream added on 2015-02-24T14:07:58Z : No. of bitstreams: 1 ISSN16645456-2012-02-01-45-51.pdf: 723489 bytes, checksum: d2deac0fcac4961fe74c4ad0c97a2dc7 (MD5) Background: Oropharyngeal dysphagia is common in individuals after stroke. Taste and temperature are used in dysphagia rehabilitation. The influence of stimuli, such as taste and temperature, on swallowing biomechanics has been investigated in both healthy individuals and in individuals with neurological disease. However, some questions still remain unanswered, such as how the sequence of offered stimuli influences the pharyngeal response. The goal of the present study was to determine the influence of the sequence of stimuli, sour taste and cold temperature, on pharyngeal transit time during deglutition in individuals after stroke. Methods: The study included 60 individuals with unilateral ischemic stroke, 29 males and 31 females, aged 41–88 years (mean age: 66.2 years) examined 0–50 days after ictus (median: 6 days), with mild to moderate oropharyngeal dysphagia. Exclusion criteria were hemorrhagic stroke patients, patients with decreased level of consciousness, and clinically unstable patients, as confirmed by medical evaluation. The individuals were divided into two groups of 30 individuals each. Group 1 received a nonrandomized sequence of stimuli (i.e. natural, cold, sour, and sour-cold) and group 2 received a randomized sequence of stimuli. A videofluoroscopic swallowing study was performed to analyze the pharyngeal transit time. Four different stimuli (natural, cold, sour, and sour-cold) were offered. The images were digitalized and specific software was used to measure the pharyngeal transit time. Since the values did not present regular distribution and uniform variances, nonparametric tests were performed. Results: Individuals in group 1 presented a significantly shorter pharyngeal transit time with the sour-cold stimulus than with the other stimuli. Individuals in group 2 did not show a significant difference in pharyngeal transit time between stimuli. Conclusions: The results showed that the sequence of offered stimuli influences the pharyngeal transit time in a different way in individuals after stroke and suggest that, when the sour-cold stimulus is offered in a randomized sequence, it can influence the response to the other stimuli in stroke patients. Hence, the sour-cold stimulus could be used as a therapeutic aid in dysphagic stroke patients. Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Filosofia e Ciências, Departamento de Fonoaudiologia, Marília, Av. Hygino Muzzi Filho 737, Vila Universitária, CEP 17005490, SP, Brasil Departments of Surgery, Botucatu Medical School, UNESP, Botucatu Departments of Neurology and Psychiatry, and Biostatistics, Botucatu Medical School, UNESP, Botucatu Departments of Biostatistics, Botucatu Medical School, UNESP, Botucatu Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Filosofia e Ciências, Departamento de Fonoaudiologia, Marília, Av. Hygino Muzzi Filho 737, Vila Universitária, CEP 17005490, SP, Brasil

OBJETIVO: Analisar os componentes do sinal acústico da deglutição com o auxílio de software específico. MÉTODOS: Foram avaliados 14 indivíduos saudáveis com idades variando entre 20 e 50 anos (média de 31±10 anos). A coleta de dados consistiu da captura simultânea do áudio da deglutição, por meio de um microfone, associado ao registro da imagem videofluoroscópica da deglutição. A identificação dos componentes de som e a quantificação dos tempos foram analisados posteriormente com o auxílio de software específico que possibilitou a análise simultânea entre a onda acústica e a imagem videofluoroscópica. RESULTADOS: Foram identificados três componentes de som (burst) na maioria das deglutições avaliadas. O primeiro burst apresentou tempo médio de 87,3 milissegundos (ms) para água e 78,2 para substância pastosa. O segundo burst retornou um tempo médio de 112,9 ms para água e 85,5 para consistência pastosa. O intervalo médio entre o primeiro e segundo burst foi 82,1 ms (água) e 95,3 ms (consistência pastosa), e entre o segundo e terceiro foi 339,8 ms e 322,0 ms, respectivamente para água e consistência pastosa. CONCLUSÃO: O software permitiu a visualização de três componentes do som durante a deglutição de indivíduos saudáveis e mostrou que o sinal da deglutição em indivíduos normais é altamente variável. PURPOSE: To analyze the components of the acoustic signal of swallowing using a specific software. METHODS: Fourteen healthy subjects ranging in age from 20 to 50 years (mean age 31±10 years), were evaluated. Data collection consisted on the simultaneous capture of the swallowing audio with a microphone and of the swallowing videofluoroscopic image. The bursts of the swallowing acoustic signal were identified and their duration and the interval between them were later analyzed using a specific software, which allowed the simultaneous analyses between the acoustic wave and the videofluoroscopic image. RESULTS: Three burst components were identified in most of the swallows evaluated. The first burst presented mean time of 87.3 milliseconds (ms) for water and 78.2 for the substance. The second burst presented mean time of 112.9 ms for water and 85.5 for the pasty substance. The mean interval between first and second burst was 82.1 ms for water and 95.3 ms for the pasty consistency, and between second and third burst was 339.8 ms for water and 322.0 ms for the pasty consistency. CONCLUSION: The software allowed the visualization of three bursts during the swallowing of healthy individuals, and showed that the swallowing signal in normal subjects is highly variable.

OBJETIVO: Apresentar um software que permita uma análise detalhada da dinâmica da deglutição. MATERIAIS E MÉTODOS: Participaram deste estudo dez indivíduos após acidente vascular encefálico, sendo seis do gênero masculino, com idade média de 57,6 anos. Foi realizada videofluoroscopia da deglutição e as imagens foram digitalizadas em microcomputador, com posterior análise do tempo do trânsito faríngeo da deglutição, por meio de um cronômetro e do software. RESULTADOS: O tempo médio do trânsito faríngeo da deglutição apresentou-se diferente quando comparados os métodos utilizados (cronômetro e software). CONCLUSÃO: Este software é um instrumento de análise dos parâmetros tempo e velocidade da deglutição, propiciando melhor compreensão da dinâmica da deglutição, com reflexos tanto na abordagem clínica dos pacientes com disfagia como para fins de pesquisa científica.OBJECTIVE: The present paper is aimed at introducing a software to allow a detailed analysis of the swallowing dynamics. MATERIALS AND METHODS: The sample included ten (six male and four female) stroke patients, with mean age of 57.6 years. Swallowing videofluoroscopy was performed and images were digitized for posterior analysis of the pharyngeal transit time with the aid of a chronometer and the software. RESULTS: Differences were observed in the average pharyngeal swallowing transit time as a result of measurements with chronometer and software. CONCLUSION: This software is a useful tool for the analysis of parameters such as swallowing time and speed, allowing a better understanding of the swallowing dynamics, both in the clinical approach of patients with oropharyngeal dysphagia and for scientific research purposes.

A fibrilação, atrial ou ventricular, é caracterizada por uma desorganização da atividade elétrica do músculo. O coração, que normalmente contrai-se globalmente, em uníssono e uniforme, durante a fibrilação contrai-se localmente em várias regiões, de modo descoordenado. Para estudar qualitativamente este fenômeno, é aqui proposto um novo modelo matemático, mais simples do que os demais existentes e que, principalmente, admite uma representação singela na forma de circuito elétrico equivalente. O modelo foi desenvolvido empiricamente, após estudo crítico dos modelos conhecidos, e após uma série de sucessivas tentativas, ajustes e correções. O modelo mostra-se eficaz na simulação dos fenômenos, que se traduzem em padrões espaciais e temporais das ondas de excitação normais e patológicas, propagando-se em uma grade de pontos que representa o tecido muscular. O trabalho aqui desenvolvido é a parte básica e essencial de um projeto em andamento no Departamento de Engenharia Elétrica da EESC-USP, que é a elaboração de uma rede elétrica ativa, tal que possa ser estudada utilizando recursos computacionais de simuladores usualmente aplicados em projetos de circuitos integrados Atrial and ventricular fibrillation are characterized by a disorganized electrical activity of the cardiac muscle. While normal heart contracts uniformly as a whole, during fibrillation several small regions of the muscle contracts locally and uncoordinatedly. The present work introduces a new mathematical model for the qualitative study of fibrillation. The proposed model is simpler than other known models and, more importantly, it leads to a very simple electrical equivalent circuit of the excitable cell membrane. The final form of the model equations was established after a long process of trial runs and modifications. Simulation results using the new model are in accordance with those obtained using other (more complex) models found in the related literature. As usual, simulations are performed on a two-dimensional grid of points (representing a piece of heart tissue) where normal or pathological spatial and temporal wave patterns are produced. As a future work, the proposed model will be used as the building block of a large active electrical network representing the muscle tissue, in an integrated circuit simulator

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2014-02-26T17:27:37Z No. of bitstreams: 1 WOS000242770500004.pdf: 149267 bytes, checksum: 6eaa680c314c2c84eaab2ef7ed64b994 (MD5) Made available in DSpace on 2014-02-26T17:27:37Z (GMT). No. of bitstreams: 1 WOS000242770500004.pdf: 149267 bytes, checksum: 6eaa680c314c2c84eaab2ef7ed64b994 (MD5) Previous issue date: 2006-12-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T15:29:53Z No. of bitstreams: 1 WOS000242770500004.pdf: 149267 bytes, checksum: 6eaa680c314c2c84eaab2ef7ed64b994 (MD5) Made available in DSpace on 2014-05-20T15:29:53Z (GMT). No. of bitstreams: 1 WOS000242770500004.pdf: 149267 bytes, checksum: 6eaa680c314c2c84eaab2ef7ed64b994 (MD5) Previous issue date: 2006-12-01 Objective: To evaluate the maximum residual signal auto-correlation also known as pitch amplitude (PA) values in patients with Parkinson's disease (PD) patients. Method. The signals of 21 Parkinson's patients were compared with 15 healthy individuals, divided according age and gender. Results: Statistical difference was seen between groups for PA, 0.39 for controls and 0.25 for PD. Normal value threshold was set as 0.3; (p

Voice-based user interfaces have been actively pursued aiming to help individuals with motor impairments, providing natural interfaces to communicate with machines. In this work, we have introduced a recent machine learning technique named Optimum-Path Forest (OPF) for voice-based robot interface, which has been demonstrated to be similar to the state-of-the-art pattern recognition techniques, but much faster. Experiments were conducted against Support Vector Machines, Neural Networks and a Bayesian classifier to show the OPF robustness. The proposed architecture provides high accuracy rates allied with low computational times.

To analyze the components of the acoustic signal of swallowing using a specific software.Fourteen healthy subjects ranging in age from 20 to 50 years (mean age 31 ± 10 years), were evaluated. Data collection consisted on the simultaneous capture of the swallowing audio with a microphone and of the swallowing videofluoroscopic image. The bursts of the swallowing acoustic signal were identified and their duration and the interval between them were later analyzed using a specific software, which allowed the simultaneous analyses between the acoustic wave and the videofluoroscopic image.Three burst components were identified in most of the swallows evaluated. The first burst presented mean time of 87.3 milliseconds (ms) for water and 78.2 for the substance. The second burst presented mean time of 112.9 ms for water and 85.5 for the pasty substance. The mean interval between first and second burst was 82.1 ms for water and 95.3 ms for the pasty consistency, and between second and third burst was 339.8 ms for water and 322.0 ms for the pasty consistency.The software allowed the visualization of three bursts during the swallowing of healthy individuals, and showed that the swallowing signal in normal subjects is highly variable.

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T19:05:50Z No. of bitstreams: 1 S1516-18462011000600011.pdf: 383337 bytes, checksum: de881a8b3e48e73dbb7ce2774c9133a4 (MD5) Made available in DSpace on 2013-08-22T19:05:50Z (GMT). No. of bitstreams: 1 S1516-18462011000600011.pdf: 383337 bytes, checksum: de881a8b3e48e73dbb7ce2774c9133a4 (MD5) Previous issue date: 2011-12-01 Made available in DSpace on 2013-09-30T18:22:15Z (GMT). No. of bitstreams: 2 S1516-18462011000600011.pdf: 383337 bytes, checksum: de881a8b3e48e73dbb7ce2774c9133a4 (MD5) S1516-18462011000600011.pdf.txt: 32297 bytes, checksum: a87e46cf18830c03027ed57ae62a8950 (MD5) Previous issue date: 2011-12-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:36:03Z No. of bitstreams: 2 S1516-18462011000600011.pdf: 383337 bytes, checksum: de881a8b3e48e73dbb7ce2774c9133a4 (MD5) S1516-18462011000600011.pdf.txt: 32297 bytes, checksum: a87e46cf18830c03027ed57ae62a8950 (MD5) Made available in DSpace on 2014-05-20T13:36:03Z (GMT). No. of bitstreams: 2 S1516-18462011000600011.pdf: 383337 bytes, checksum: de881a8b3e48e73dbb7ce2774c9133a4 (MD5) S1516-18462011000600011.pdf.txt: 32297 bytes, checksum: a87e46cf18830c03027ed57ae62a8950 (MD5) Previous issue date: 2011-12-01 OBJETIVO: traduzir e adaptar protocolo desenvolvido por pesquisadores alemães, adequando-o às características fonéticas e linguísticas do português falado no Brasil. Caracterizar os componentes de fala mais alterados na população com doença de Parkinson, comparando-os com grupo de sujeitos normais na mesma faixa etária. MÉTODOS: realizou-se a tradução e adaptação do protocolo. Posteriormente foram avaliados 21 pacientes com diagnóstico neurológico de Doença de Parkinson nos estágios Hoehn &Yarh, entre 2 e 3, e 10 sujeitos normais. O protocolo incluía avaliação da respiração, fonação, ressonância, articulação, prosódia e a análise acústica dos parâmetros vocais. RESULTADOS: o protocolo mostrou-se de fácil aplicação clínica. Nos sujeitos com doença de Parkinson foram observadas alterações predominantes na fonação (85,9%) e articulação (42,9%). CONCLUSÃO: o estudo demonstrou ser o protocolo uma ferramenta eficiente para a avaliação da disartria em pacientes com doença de Parkinson. PURPOSE: to translate and adapt the protocol developed by German researchers, adjusting it to the phonetic and linguistic characteristics of Brazilian Portuguese. Observe the amended speech components in a group of patients with Parkinson's disease, and comparing them with normal subjects in the same age. METHOD: twenty one patients with neurological diagnosis of Parkinson's disease in the Hoehn & Yarh stages (2-3), and 10 control subjects were assessed. The protocol was translated, adjusted and applied to the subjects of both control and Parkinson's disease group, assessing the breathing, phonation, resonance, articulation, prosody and acoustic analysis. RESULTS: in the dysarthria evaluation, the protocol showed to be simple and it presented a fast clinical application. In the subjects with Parkinson's disease, we observed alterations in both phonation (85.9%) and articulation (42.9%). CONCLUSION: the study demonstrated that the protocol is an efficient tool for dysarthria assessment in patients with Parkinson's disease. UNESP Faculdade de Medicina de Botucatu Departamento de Neurologia e Psiquiatria UNESP Faculdade de Medicina de Botucatu Departamento de Oftalmologia e Otorrinolaringologia UNESP Faculdade de Medicina de Botucatu departamento de Neurologia e Psiquiatria UNESP Faculdade de Medicina de Botucatu Departamento de Neurologia e Psiquiatria UNESP Faculdade de Medicina de Botucatu Departamento de Oftalmologia e Otorrinolaringologia UNESP Faculdade de Medicina de Botucatu departamento de Neurologia e Psiquiatria

In this paper we deal with the problem of feature selection by introducing a new approach based on Gravitational Search Algorithm (GSA). The proposed algorithm combines the optimization behavior of GSA together with the speed of Optimum-Path Forest (OPF) classifier in order to provide a fast and accurate framework for feature selection. Experiments on datasets obtained from a wide range of applications, such as vowel recognition, image classification and fraud detection in power distribution systems are conducted in order to asses the robustness of the proposed technique against Principal Component Analysis (PCA), Linear Discriminant Analysis (LDA) and a Particle Swarm Optimization (PSO)-based algorithm for feature selection.

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:47:19Z No. of bitstreams: 1 S0004-28032010000100004.pdf: 127556 bytes, checksum: 590a8763ed7292aee076b7ad79018cb9 (MD5) Made available in DSpace on 2013-08-22T18:47:19Z (GMT). No. of bitstreams: 1 S0004-28032010000100004.pdf: 127556 bytes, checksum: 590a8763ed7292aee076b7ad79018cb9 (MD5) Previous issue date: 2010-03-01 Made available in DSpace on 2013-09-30T18:15:19Z (GMT). No. of bitstreams: 2 S0004-28032010000100004.pdf: 127556 bytes, checksum: 590a8763ed7292aee076b7ad79018cb9 (MD5) S0004-28032010000100004.pdf.txt: 23508 bytes, checksum: 43fe0ba22569f73b1e0551de254b569b (MD5) Previous issue date: 2010-03-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:31:40Z No. of bitstreams: 2 S0004-28032010000100004.pdf: 127556 bytes, checksum: 590a8763ed7292aee076b7ad79018cb9 (MD5) S0004-28032010000100004.pdf.txt: 23508 bytes, checksum: 43fe0ba22569f73b1e0551de254b569b (MD5) Made available in DSpace on 2014-05-20T13:31:40Z (GMT). No. of bitstreams: 2 S0004-28032010000100004.pdf: 127556 bytes, checksum: 590a8763ed7292aee076b7ad79018cb9 (MD5) S0004-28032010000100004.pdf.txt: 23508 bytes, checksum: 43fe0ba22569f73b1e0551de254b569b (MD5) Previous issue date: 2010-03-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) CONTEXTO: O efeito do sabor azedo e as variações da temperatura dos alimentos em indivíduos disfágicos, ainda não foi totalmente esclarecidos. OBJETIVO: Verificar o efeito do sabor azedo e da temperatura fria no tempo de trânsito faríngeo da deglutição em indivíduos após acidente vascular encefálico hemisférico isquêmico. MÉTODOS: Participaram deste estudo 30 indivíduos adultos, sendo 16 do gênero masculino e 14 do feminino, destros, com faixa etária variando de 41 a 88 anos (média de 62,3 anos) e ictus que variou de 1 a 30 dias (mediana de 6 dias). Para analisar o tempo de trânsito faríngeo da deglutição foi realizado o exame de videofluoroscopia da deglutição. Cada indivíduo foi observado durante a deglutição de bolo na consistência pastosa, oferecido em colher, com 5 mL cada, sendo ao todo quatro estímulos diferentes, um por vez. Posteriormente os exames foram analisados com auxílio de um software específico para medição do tempo de deslocamento do bolo pela fase faríngea. RESULTADOS: Os resultados mostraram que o tempo de trânsito faríngeo da deglutição foi significantemente menor durante a deglutição de bolo azedo gelado quando comparado aos outros estímulos. CONCLUSÃO: Constatou-se que estímulos com sabor azedo associado à temperatura fria provocam significativa mudança na dinâmica da deglutição, diminuindo o tempo de trânsito faríngeo, podendo assim proporcionar efeitos positivos em indivíduos com disfagia orofaríngea. CONTEXT: The effect of sour taste and food temperature variations in dysphagic patients has not been entirely clarified. OBJECTIVE: To determine the effect of sour and cold food in the pharyngeal transit times of patients with stroke. METHODS: Patients participating in this study were 30 right-handed adults, 16 of which were male and 14 were female, aged 41 to 88 (average age 62.3 years) with ictus varying from 1 to 30 days (median of 6 days). To analyze the pharyngeal transit time a videofluoroscopy swallow test was performed. Each patient was observed during swallow of a 5 mL paste bolus given by spoon, totaling four different stimuli (natural, cold, sour and cold sour), one at a time, room temperature (22ºC) and cold (8ºC) were used. Later, the tests were analyzed using specific software to measure bolus transit time during the pharyngeal phase. RESULTS: The results showed that the pharyngeal transit time was significantly shorter during swallow of cold sour bolus when compared with other stimuli. Conclusion - Sour taste stimuli associated to cold temperature cause significant change in swallowing patterns, by shortening the pharyngeal transit time, which may lead to positive effects in patients with oropharyngeal dysphagia. São Paulo State University Botucatu Medical School Department of Surgery UNESP Marília College of Philosophy and Sciences Department of Speech-Pathology UNESP Botucatu Medical School Department of Neurology and Psychiatry São Paulo State University Botucatu Medical School Department of Surgery UNESP Marília College of Philosophy and Sciences Department of Speech-Pathology UNESP Botucatu Medical School Department of Neurology and Psychiatry

The applications of Automatic Vowel Recognition (AVR), which is a sub-part of fundamental importance in most of the speech processing systems, vary from automatic interpretation of spoken language to biometrics. State-of-the-art systems for AVR are based on traditional machine learning models such as Artificial Neural Networks (ANNs) and Support Vector Machines (SVMs), however, such classifiers can not deal with efficiency and effectiveness at the same time, existing a gap to be explored when real-time processing is required. In this work, we present an algorithm for AVR based on the Optimum-Path Forest (OPF), which is an emergent pattern recognition technique recently introduced in literature. Adopting a supervised training procedure and using speech tags from two public datasets, we observed that OPF has outperformed ANNs, SVMs, plus other classifiers, in terms of training time and accuracy.

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T19:05:48Z No. of bitstreams: 1 S1516-18462010000100010.pdf: 247237 bytes, checksum: 0e0d84aa4b66936319adfab44a715a7d (MD5) Made available in DSpace on 2013-08-22T19:05:48Z (GMT). No. of bitstreams: 1 S1516-18462010000100010.pdf: 247237 bytes, checksum: 0e0d84aa4b66936319adfab44a715a7d (MD5) Previous issue date: 2010-02-01 Made available in DSpace on 2013-09-30T18:21:36Z (GMT). No. of bitstreams: 2 S1516-18462010000100010.pdf: 247237 bytes, checksum: 0e0d84aa4b66936319adfab44a715a7d (MD5) S1516-18462010000100010.pdf.txt: 31533 bytes, checksum: 5b9c9b75f1f9fe0900211ae803829970 (MD5) Previous issue date: 2010-02-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:36:18Z No. of bitstreams: 2 S1516-18462010000100010.pdf: 247237 bytes, checksum: 0e0d84aa4b66936319adfab44a715a7d (MD5) S1516-18462010000100010.pdf.txt: 31533 bytes, checksum: 5b9c9b75f1f9fe0900211ae803829970 (MD5) Made available in DSpace on 2014-05-20T13:36:18Z (GMT). No. of bitstreams: 2 S1516-18462010000100010.pdf: 247237 bytes, checksum: 0e0d84aa4b66936319adfab44a715a7d (MD5) S1516-18462010000100010.pdf.txt: 31533 bytes, checksum: 5b9c9b75f1f9fe0900211ae803829970 (MD5) Previous issue date: 2010-02-01 OBJETIVO: apresentar uma proposta para o controle de eficácia terapêutica em disfagia orofaríngea neurogênica. MÉTODOS: o protocolo foi proposto em concordância com a literatura atual e aplicado em um indivíduo pós-acidente vascular encefálico (AVE) isquêmico à direita, comprovado por tomografia computadorizada, com disfagia orofaríngea grave crônica, gênero masculino, 66 anos, apresentando aspiração laringotraqueal e em uso de sonda nasoentérica exclusiva pré-fonoterapia. Para controle da eficácia terapêutica do programa de reabilitação fonoaudiológica foi aplicado, pré e pós-fonoterapia, a classificação do grau de comprometimento da disfagia orofaríngea, Functional Oral Intake Scale (FOIS), a avaliação videofluoroscópica da deglutição com medida do tempo de trânsito faríngeo (TTF) da deglutição por meio de software e da percepção do indivíduo. RESULTADOS: na pré-fonoterapia verificou-se disfagia orofaríngea grave, FOIS nível 1, presença de aspiração laringotraqueal para mais de uma consistência e tempo de trânsito faríngeo de 13 segundos. Após fonoterapia verificou-se disfagia orofaríngea moderada, FOIS nível 5, ausência de aspiração laringotraqueal e TTF de 4 segundos. CONCLUSÃO: o protocolo proposto foi capaz de avaliar a eficácia da reabilitação na disfagia orofaríngea neurogênica neste indivíduo pós-acidente vascular encefálico, tanto para mensurar as mudanças ocorridas na fisiopatologia da deglutição quanto na ingestão oral e na percepção do indivíduo. Outros estudos com populações distintas são necessários, sendo que novas propostas devem ainda refletir a inclusão da condição nutricional e pulmonar do indivíduo no controle de eficácia em disfagia orofaríngea. PURPOSE: to submit a proposal for efficacy control in neurogenic oropharyngeal dysphagia. METHODS: the protocol was proposed in accordance with other researches and applied in one post-stroke individual, with right-hemispheric lesion confirmed by computed tomography, with oropharyngeal dysphagia, male gender, 66-year old, with laringotraqueal aspiration and using nasogastric feeding tube before swallowing therapy. In order to control the therapy effectiveness in pre- and post-swallowing therapy, the following procedures were applied: classification of severity degree for oropharyngeal dysphagia, functional oral intake scale (FOIS), videofluoroscopic evaluation of swallowing with additional swallowing pharyngeal transit time evaluation using a specific software and individual perception. RESULTS: before swallowing therapy, severe oropharyngeal dysphagia, FOIS level 1, presence of laryngotracheal aspiration, and 13 seconds of pharyngeal transit time were found. After swallowing therapy, moderate oropharyngeal dysphagia, FOIS level 5, absence of laryngotracheal aspiration, and 4 seconds of pharyngeal transit time were found. CONCLUSION: the proposed protocol could measure changes, both for pathophysiology of swallowing as well as for oral ingestion of the individual. We believe that it is still necessary to include nutritional and lung status of the individual in efficacy control of oropharyngeal dysphagia. Universidade Estadual Paulista Departamento de Fonoaudiologia Hospital Estadual de Bauru Universidade Estadual Paulista Faculdade de Medicina de Botucatu Departamento de Cirurgia Universidade Estadual Paulista Faculdade de Medicina de Botucatu Departamento de Neurologia e Neuropsiquiatria Universidade de São Paulo Universidade Estadual Paulista Departamento de Fonoaudiologia Universidade Estadual Paulista Faculdade de Medicina de Botucatu Departamento de Cirurgia Universidade Estadual Paulista Faculdade de Medicina de Botucatu Departamento de Neurologia e Neuropsiquiatria

Optimum path forest-based classifiers are a novel approach for supervised pattern recognition. The OPF classifier differs from traditional approaches by not estimating probability density functions of the classes neither assuming samples linearity, and creates a discrete optimal partition of the feature space, in which the decision boundary is obtained by the influence zones of the most representative samples of the training set. Due to the large number of applications in biomedical signal processing involving pattern recognition techniques, specially voice disorders identification, we propose here the laryngeal pathology detection by means of OPF. Experiments were performed in three public datasets against SVM, and a comparison in terms of accuracy rates and execution times was also regarded.

The swallowing disturbers are defined as oropharyngeal dysphagia when present specifies signals and symptoms that are characterized for alterations in any phases of swallowing. Early diagnosis is crucial for the prognosis of patients with dysphagia and the potential to diagnose dysphagia in a noninvasive manner by assessing the sounds of swallowing is a highly attractive option for the dysphagia clinician. This study proposes a new framework for oropharyngeal dysphagia identification, having two main contributions: a new set of features extract from swallowing signal by discrete wavelet transform and the dysphagia classification by a novel pattern classifier called OPF. We also employed the well known SVM algorithm in the dysphagia identification task, for comparison purposes. We performed the experiments in two sub-signals: the first was the moment of the maximal peak (MP) of the signal and the second is the swallowing apnea period (SAP). The OPF final accuracy obtained were 85.2% and 80.2% for the analyzed signals MP and SAP, respectively, outperforming the SVM results.

Made available in DSpace on 2014-10-01T13:08:37Z (GMT). No. of bitstreams: 0 Previous issue date: 2013Bitstream added on 2014-10-01T14:03:03Z : No. of bitstreams: 1 S2317-17822013000200012.pdf: 669964 bytes, checksum: 9978d2221eff239ba8c5c9b674f921d7 (MD5) OBJETIVO: Verificar o efeito do sabor azedo e da temperatura fria no tempo de trânsito oral da deglutição. MÉTODOS: Participaram deste estudo 52 indivíduos (28 do gênero masculino e 24 do gênero feminino) após acidente vascular encefálico isquêmico, com lesão à direita ou à esquerda e disfagia orofaríngea de grau leve a moderado, com idades variando de 50 a 80 anos (mediana=66 anos). Foi realizada a videofluoroscopia da deglutição para a análise dos tempos de deglutição. Cada indivíduo foi avaliado durante a deglutição de bolo na consistência pastosa, oferecido em colher com 5 ml, com quatro estímulos diferentes (natural, frio, azedo e azedo-frio). Após o exame foram realizadas as medidas de tempo de trânsito oral utilizando software específico. Foram mensurados o tempo de trânsito oral (a partir do início do movimento do bolo alimentar na boca) e o tempo de trânsito oral total (a partir do momento em que o bolo é colocado na boca). RESULTADOS: A associação entre o estímulo azedo e a temperatura fria provocou mudanças significavas no tempo de trânsito oral total e no tempo de trânsito oral, com redução nestes tempos. CONCLUSÃO: O sabor azedo e a temperatura fria associados apresentaram redução do tempo de trânsito oral em pacientes pós acidente vascular encefálico. PURPOSE: To determine the effect of sour flavor and cold temperature on oral transit time during swallowing. METHODS: Participants were 52 subjects (28 male and 24 female) with ages between 50 and 80 years (median=66 years), after ischemic stroke involving right or left side damage and mild to moderate oropharyngeal dysphagia. Videofluoroscopy was performed to analyze the swallowing times. Each subject was assessed during swallowing of a paste consistency bolus offered in 5 ml spoons, with a total of four different stimuli (natural, cold, sour and sour-cold). After the exam, the oral transit time was measured using specific software. The oral transit time (starting at the beginning of the bolus movement in the mouth) and the total oral transit time (starting at the moment that the bolus is placed in the mouth) were measured. RESULTS: The association between sour and cold stimuli caused a significant decrease of oral transit time and total oral transit time. CONCLUSION: Sour flavor and cold temperature reduced oral transit time in stroke patients. Universidade Estadual Paulista Júlio de Mesquita Filho Botucatu Medical School Department of Neurology and Psychiatry Universidade Estadual Paulista Júlio de Mesquita Filho Botucatu Medical School Department of Surgery Universidade Estadual Paulista Júlio de Mesquita Filho Marília College of Philosophy and Sciences Department of Speech-Language Pathology and Audiology Universidade Estadual Paulista Júlio de Mesquita Filho School of Engineering Department of Electrical Engineering Universidade Estadual Paulista Júlio de Mesquita Filho Botucatu Medical School Department of Bioestatistic Universidade Estadual Paulista Júlio de Mesquita Filho Botucatu Medical School Department of Neurology and Psychiatry Universidade Estadual Paulista Júlio de Mesquita Filho Botucatu Medical School Department of Surgery Universidade Estadual Paulista Júlio de Mesquita Filho Marília College of Philosophy and Sciences Department of Speech-Language Pathology and Audiology Universidade Estadual Paulista Júlio de Mesquita Filho School of Engineering Department of Electrical Engineering Universidade Estadual Paulista Júlio de Mesquita Filho Botucatu Medical School Department of Bioestatistic