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IS THE FREQUENCY IN SOMATOSENSORY ELECTRICAL STIMULATION THE KEY PARAMETER IN MODULATING THE CORTICOSPINAL EXCITABILITY OF HEALTHY VOLUNTEERS AND STROKE PATIENTS WITH SPASTICITY?
Garcia, Marco Antonio Cavalcanti et al. | Date Issued: 2016
Author
Garcia, Marco Antonio Cavalcanti
Catunda, João Marcos Yamasaki
Souza, Marcio Nogueira de
Fontana, Ana Paula
Sperandei, Sandro
Vargas, Claudia D.
Affilliation
Universidade Federal do Rio de Janeiro. Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa em Engenharia. Laboratório de Instrumentação Biomédica. Programa de Engenharia Biomédica. Rio de Janeiro, RJ, Brasil / Universidade Federal do Rio de Janeiro. Laboratório de Neurobiologia II, Instituto de Biofísica Carlos Chagas Filho. Rio de Janeiro, RJ, Brasil / Universidade Federal do Rio de Janeiro. Departamento de Biociências da Atividade Física. Escola de Educação Física e Desportos. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa em Engenharia. Laboratório de Instrumentação Biomédica. Programa de Engenharia Biomédica. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa em Engenharia. Laboratório de Instrumentação Biomédica. Programa de Engenharia Biomédica. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Faculdade de Medicina. Departamento de Fisioterapia. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto de Comunicação e Informação Científica e Tecnológica em Saúde. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa em Engenharia. Laboratório de Instrumentação Biomédica. Programa de Engenharia Biomédica. Rio de Janeiro, RJ, Brasil.
Abstract
Somatosensory electrical stimulation (SES) has been proposed as an approach to treat patients with sensory-motor impairment such as spasticity. However, there is still no consensus regarding which would be the adequate SES parameters to treat those deficits. Therefore, the aim of this study was to evaluate the effects of applying SES over the forearm muscles at four different frequencies of stimulation (3, 30, 150, and 300 Hz) and in two intervals of time (5' and 30') by means of transcranial magnetic stimulation and Hoffmann’s reflex (H-reflex) in healthy volunteers (Experiments I and II). A group of stroke patients (Experiment III) was also preliminary evaluated to ascertain SES effects at a low frequency (3 Hz) applied for 30' over the forearm spastic flexors muscles by measuring the wrist joint passive torque. Motor evoked potentials and the H-reflex were collected from different forearm and hand muscles immediately before and after SES and up to 5' (Experiment I) and 10' (Experiments I and II) later. None of the investigated frequencies of SES was able to operate as a key in switching modulatory effects in the central nervous system of healthy volunteers and stroke patients with spasticity.
Keywords
Somatosensory Electrical Stimulation
Corticospinal Excitability
Experiments
 
Publisher
Freund & Pettman
Citation
GARCIA, Marco Antonio Cavalcanti et al. Is the Frequency in Somatosensory Electrical Stimulation the Key Parameter in Modulating the Corticospinal Excitability of Healthy Volunteers and Stroke Patients with Spasticity? Neural Plasticity, v. 2016, p. 1-11, Jan. 2016.
DOI
10.1155/2016/3034963
ISSN
2090-5904