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Start Over Author "Vannozzi, G" Publisher elsevier b.v.
26 results on '"Vannozzi, G"'

10. Extraction of information on elder motor ability from clinical and biomechanical data through data mining

Author

Vannozzi, G., Cereatti, A., Mazzà, C., Benvenuti, F., and Della Croce, U.

Subjects
*MEDICAL research, *DATA mining, *ASSOCIATION rule mining, *BIOMECHANICS, *MOTOR ability testing, *OLDER people
Abstract

This study aimed at evaluating the additional knowledge provided by a biomechanical test coupled with clinical tests for motor ability assessment. A database including clinical test scores and sit-to-stand test variables obtained from 110 medically stable elderly subjects was submitted to data mining by searching for association rules. The presence of rules revealed some redundancies due to sample homogeneity, as mainly observed in the joint analysis of a questionnaire for daily activities assessment (Nottingham test) and the sit-to-stand, and due to similar evaluated information, as resulted from the joint analysis of a balance and gait scale (Tinetti test) and the sit-to-stand. Conversely, when no association rules were found, the tests carried unrelated information. The associations mined while analysing these clinical tests encouraged the integration of biomechanical tests, increasing significantly its clinical applicability and reducing the information redundancy. The information extracted also allowed to highlight rules typical of elderly persons that may serve as a knowledge-based tool for the detection of possible deviation from normality. [Copyright &y& Elsevier]

Published
2007
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18. Mechanisms of head stability during gait initiation in young and older women: A neuro-mechanical analysis.

Author

Maslivec, A., Bampouras, T.M., Dewhurst, S., Vannozzi, G., Macaluso, A., and Laudani, L.

Subjects
*GAIT in humans, *OLDER women, *HUMAN locomotion, *PHOTOGRAMMETRY, *MEDICAL photography, *ELECTROMYOGRAPHY, *PHYSIOLOGY, *SKELETAL muscle physiology, *AGING, *POSTURAL balance, *KINEMATICS, *MOTION, *BODY movement, *SKELETAL muscle
Abstract

Decreased head stability has been reported in older women during locomotor transitions such as the initiation of gait. The aim of the study was to investigate the neuro-mechanical mechanisms underpinning head stabilisation in young and older women during gait initiation. Eleven young (23.1 ± 1.1 yrs) and 12 older (73.9 ± 2.4 yrs) women initiated walking at comfortable speed while focussing on a fixed visual target at eye level. A stereophotogrammetric system was used to assess variability of angular displacement and RMS acceleration of the pelvis, trunk and head, and dynamic stability in the anteroposterior and mediolateral directions. Latency of muscle activation in the sternocleidomastoid, and upper and lower trunk muscles were determined by surface electromyography. Older displayed higher variability of head angular displacement, and a decreased ability to attenuate accelerations from trunk to head, compared to young in the anteroposterior but not mediolateral direction. Moreover, older displayed a delayed onset of sternocleidomastoid activation than young. In conclusion, the age-related decrease in head stability could be attributed to an impaired ability to attenuate accelerations from trunk to head along with delayed onset of neck muscles activation. [ABSTRACT FROM AUTHOR]

Published
2018
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