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Percutaneous electrical nerve stimulation (PENS) consists of applying an electric current of1,000 Hz to different neuromuscular structures through acupuncture needles. Currently, there is controversy surrounding the effect of PENS on muscle strength in the scientific literature. The main objective was to assess the effect of PENS applied to the median and cubital nerves on the maximum handgrip strength (MHS) compared to sham stimulation, as well as to determine the safety of the intervention. A parallel, randomized, double-blind controlled trial in a sample of 20 healthy subjects. Participants were randomly allocated in the experimental (n = 10) and control (n = 10) groups. A blinded researcher measured MHS. Measurements of MHS of the dominant hand were taken at four time points: preintervention, immediately postintervention, 24 hr after the intervention, and at a 10-day follow-up. A 10-Hz percutaneous electrical current stimulation was employed. The control group also received the same puncture method but with no electric stimulation. Compared to baseline, the MHS decreased 10.4% (SEM = 3.2, p = .02) in the PENS group at 24 hr postintervention, with no differences observed between baseline and at 10 days postintervention. No changes in grip strength were observed at any time point in the sham group. To sum up, PENS decreased MHS at 24 hr postintervention, which does not persist 10 days after the stimulation. PENS can be considered a safe technique. Trials with larger sample sizes are required to corroborate the findings of this study. Clinical Trials Registration: NCT, NCT04662229, filed on March 12th of 2020.

Former studies investigated the application of high-frequency alternating currents (HFAC) in humans for blocking the peripheral nervous system. The present trial aims to assess the effect of HFAC on the motor response, somatosensory thresholds, and peripheral nerve conduction when applied percutaneously using frequencies of 10 kHz and 20 kHz in healthy volunteers. A parallel, placebo-controlled, double-blind, randomized clinical trial was conducted. Ultrasound-guided HFAC at 10 kHz and 20 kHz and sham stimulation were delivered to the median nerve of 60 healthy volunteers for 20 min. The main assessed variables were the maximum isometric flexion strength (MFFS) of the index finger, myotonometry, pressure pain threshold (PPT), mechanical detection threshold (MDT), and sensory nerve action potential (SNAP). A decrease in the MFFS is observed immediately postintervention compared to baseline, both in the 10 kHz group (−8.5%; 95% CI −14.9 to −2.1) and the 20 kHz group (−12.0%; 95% CI −18.3 to −5.6). The between-group comparison of changes in MFFS show a greater reduction of −10.8% (95% CI −19.8 to −1.8) immediately postintervention in the 20 kHz compared to the sham stimulation group. The percutaneous stimulation applying 20 kHz HFAC to the median nerve produces a reversible postintervention reduction in strength with no adverse effects.

PURPOSE To assess the effects of aerobic exercise (AE) on patients with migraine in terms of pain intensity, frequency and duration of migraine, and quality of life. METHODS A systematic review and meta-analysis of randomized controlled trials were conducted. Standardized mean differences (SMDs) and 95% confidence intervals (CIs) were calculated for relevant outcomes and were pooled in a meta-analysis using the random-effects model. RESULTS A total of 10 articles from 1950 to 2019 were included, involving 508 patients. The meta-analysis showed statistically significant differences in the decrease in pain intensity (five studies, n = 166; SMD = 1.25; 95% CI 0.47-2.04), frequency (six studies, n = 214; SMD = 0.76; 95% CI 0.32-1.2) and duration of migraine (four studies, n = 106; SMD = 0.41; 95% CI 0.03-0.8), in the short-term. In addition, the meta-analysis showed statistically significant differences in the increase in quality of life (four studies, n = 150; SMD = 2.7; 95% CI 1.17-4.24), even though the Egger's test suggested significant evidence of publication bias for the analysis of quality of life (intercept = 5.81; t = 6.97; P = .02). CONCLUSIONS There is low- and moderate-quality evidence that in patients with migraine AE can decrease the pain intensity, frequency and duration of migraine and can also increase quality of life.

BackgroundFormer studies investigated the application, both transcutaneous and with implanted electrodes, of high frequency alternating currents (HFAC) in humans for blocking the peripheral nervous system. The present trial aimed to assess the effect of HFAC on motor response, somatosensory thresholds, and peripheral nerve conduction, when applied percutaneously with ultrasound-guided needles at frequencies of 10 kHz and 20 kHz in healthy volunteers. MethodsA parallel, placebo-controlled, double-blind, randomized clinical trial was conducted. Ultrasound-guided HFAC at 10 kHz and 20 kHz and sham stimulation were delivered to the median nerve of 60 healthy volunteers (n=20 per group) for 20 minutes. The main assessed variables were maximum isometric flexion strength (MFFS) of the index finger, myotonometry, pressure pain threshold (PPT), mechanical detection threshold (MDT), and antidromic sensory nerve action potential (SNAP). Measurements were recorded pre-intervention, during the intervention 15 minutes after its commencement, immediately post-intervention, and at 15 minutes post-intervention.ResultsA decrease in the MFFS was observed immediately post-intervention compared to baseline, both in the 10 kHz group [-8.5 %; 95% confidence interval (CI) -14.9 to -2.1] and the 20 kHz group (-12.0%; 95%CI -18.3 to -5.6). At 15 minutes post-intervention, the decrease in the MFFS was -9.5% (95%CI -17.3 to -1.8) and -11.5% (95%CI -9.3 to -3.8) in the 10 kHz and 20 kHz groups, respectively. No changes over time were found in the sham group. The between-group comparison of changes in MFFS showed a greater reduction of -10.8% (95%CI -19.8 to -1.8) immediately post-intervention in the 20 kHz compared to the sham stimulation group. Muscle tone increased over time in both the 10 kHz and 20 kHz groups, but not in the sham group. The intergroup comparison of myotonometry showed a superior effect in the 20 kHz (6.7%, 95%CI 0.5 to 12.9) versus the sham group. No significant changes were observed in the rest of the assessed variables. ConclusionsThe ultrasound-guided percutaneous stimulation applying 10 kHz and 20 kHz HFAC to the median nerve produced reversible reductions in strength and increases in muscle tone with no adverse effects.

Introducción: El síndrome de Ehlers Danlos (EDS) es una colagenopatía hereditaria, producida por defectos genéticos de la formación de colágeno. En la literatura, la cirugía ortopédica no reporta ningún beneficio sobre el dolor, siendo siempre la segunda opción de tratamiento, no existiendo evidencia para un tratamiento conservador adecuado. Presentación del caso: paciente MR, mujer de 18 años con sensación de debilidad en miembros inferiores, con dolor articular en miembro inferior (EVA 28). Como antecedentes médicos, el más relevante es síndrome de Ehlers-Danlos (SED) tipo hipermóvil y múltiples cirugías ortopédicas. Hallazgos clínicos: el análisis de la marcha muestra un patrón en Trendelenburg. No presenta una alteración en factores psicosociales, pero sí en función de miembro superior (Quick Dash) 66% e inferior (LEFI) 43/80. Tratamiento conservador: siendo el objetivo principal mejorar la función del miembro inferior, se realizó una intervención de fisioterapia ejercicio terapéutico y trabajo de marcha con imaginería motora y observación de acciones. Resultados y conclusión: mejora de todas las variables al mes de tratamiento, en especial la TSK-11 (11 puntos). La imaginería motora y observación de acciones mejora la ejecución de la marcha post aplicación y de la función de miembro inferior combinado con ejercicio.

El dolor neuropático periférico por atrapamiento es una patología muy descrita en la literatura desde el punto de vista anatomo-patológico. No obstante, la literatura solo nos presenta un manejo quirúrgico, con técnicas poco conservadoras y es por ello que presentamos este caso. Paciente LG, varón de 46 años que acude a consulta con 1) alodinia en la cara medial del brazo y dolor eléctrico con pinchazos hasta la muñeca (EVA 84); 2) molestias en epicóndilo lateral tras fondos en el gimnasio (EVA 30). La resonancia magnética nuclear no muestra hallazgos relevantes. Presentaba limitación de 10º en la extensión de codo y una flexión glenohumeral de 45º, con endfeel doloroso y los test neurodinámicos ULNT2b para radial y modificación para musculocutáneo positivos. Los cuestionarios Quick Dash (86,7%) y Tampa Scale of Kinesiophobia (29/44) con valores muy altos. Tratamiento conservador: se realizó una intervención de fisioterapia, combinando ejercicio cardiovascular, fuerza resistencia y control motor, combinado con terapia manual. Los síntomas neurales y el ROM se recuperaron por completo. El cuestionario Quick Dash (2,27%), TSK (16) y fuerza de prensión (de 20 a 59kg) mostraron una mejora clínicamente relevante. La fisioterapia, mediante un tratamiento que promueva el ejercicio y estrategias de afrontamiento activas son de gran utilidad en pacientes con signos/síntomas neurales.

Objective To assess the effectiveness of cervical manual therapy (MT) on patients with temporomandibular disorders (TMDs) and to compare cervico-craniomandibular MT vs cervical MT. Design Systematic review and meta-analysis (MA). Methods A search in PubMed, EMBASE, PEDro, and Google Scholar was conducted with an end date of February 2019. Two independent reviewers performed the data analysis, assessing the relevance of the randomized clinical trials regarding the studies’ objectives. The qualitative analysis was based on classifying the results into levels of evidence according to the Grading of Recommendations, Assessment, Development and Evaluation (GRADE). Results Regarding cervical MT, MA included three studies and showed statistically significant differences in pain intensity reduction and an increase in masseter pressure pain thresholds (PPTs), with a large clinical effect. In addition, the results showed an increase in temporalis PPT, with a moderate clinical effect. MA included two studies on cervical MT vs cervico-craniomandibular MT interventions and showed statistically significant differences in pain intensity reduction and pain-free maximal mouth opening, with a large clinical effect. Conclusions Cervical MT treatment is more effective in decreasing pain intensity than placebo MT or minimal intervention, with moderate evidence. Cervico-craniomandibular interventions achieved greater short-term reductions in pain intensity and increased pain-free MMO over cervical intervention alone in TMD and headache, with low evidence.

Objectives The objective was to explore whether action observation (AO) and motor imagery (MI) of aerobic and isometric exercise could induce hypoalgesic responses in asymptomatic individuals compared with placebo observation (PO). Methods A randomized controlled pilot trial was designed. Twenty-four healthy participants (mean age = 21.9 ± 2.1 years) were randomized into three groups: AO+MI (N = 8), AO, (N = 8), and PO (N = 8). All participants performed an actual aerobic running exercise (three series of 90 seconds at 85% of their VO2max and 30 seconds at 65% of their VO2max) and an isometric exercise protocol (isometric squats). A day later, they all performed the mental intervention, observing or imagining exercise execution performed the day before, according to their allocated group. Pressure pain thresholds (PPTs) of the quadriceps and epicondyle regions were assessed at baseline, postintervention, and 15 minutes postintervention. Results Analysis of variance revealed statistically significant differences in the group*time interaction for PPT in the quadriceps. The AO group showed a statistically significant increase at postintervention and at 15 minutes postintervention. The AO+MI group obtained a statistically significant increase in the two PPT regions compared with the PO group at Δpre–post. The AO group obtained a greater increase in the PPT in the quadriceps femoris than the PO group at Δpre–post and Δpre–post 15 minutes. Conclusions AO and MI induce hypoalgesic responses compared with PO. AO isolated training showed pain modulation responses in the PPTs of the quadriceps region in young physically active adults. These findings highlight the potential role of brain training in pain management.