| Texto completo | |
| Autor(es): |
Suzuki, Shinya
[1]
;
Nakajima, Tsuyoshi
[2]
;
Mezzarane, Rinaldo A.
[3, 4, 5]
;
Ohtsuka, Hiroyuki
[6]
;
Futatsubashi, Genki
[1]
;
Komiyama, Tomoyoshi
[1, 3]
Número total de Autores: 6
|
| Afiliação do(s) autor(es): | [1] Tokyo Gakugei Univ, Div Hlth & Sports Educ, United Grad Sch Educ, Tokyo - Japan
[2] Kyorin Univ, Sch Med, Dept Integrat Physiol, Tokyo - Japan
[3] Chiba Univ, Div Hlth & Sports Sci, Fac Educ, Inage Ku, Chiba 2638522 - Japan
[4] Univ Brasilia, Coll Phys Educ, Lab Signal Proc & Motor Control, Brasilia, DF - Brazil
[5] Univ Sao Paulo, Biomed Engn Lab, EPUSP, PTC, Sao Paulo - Brazil
[6] Hlth Sci Univ Hokkaido, Dept Phys Therapy, Sch Rehabil Sci, Tobetsu, Hokkaido - Japan
Número total de Afiliações: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Experimental Brain Research; v. 232, n. 10, p. 3069-3078, OCT 2014. |
| Citações Web of Science: | 5 |
| Resumo | |
Although sensory inputs from the contralateral limb strongly modify the amplitude of the Hoffmann (H-) reflex in a static posture, it remains unknown how these inputs affect the excitability of the monosynaptic H-reflex during walking. Here, we investigated the effect of the electrical stimulation of a cutaneous (CUT) nerve innervating the skin on the dorsum of the contralateral foot on the excitability of the soleus H-reflex during standing and walking. The soleus H-reflex was conditioned by non-noxious electrical stimulation of the superficial peroneal nerve in the contralateral foot. Significant crossed facilitation of the soleus H-reflex was observed at conditioning-to-test intervals in a range of 100-130 ms while standing, without any change in the background soleus electromyographic (EMG) activity. In contrast, the amplitude of the soleus H-reflex was significantly suppressed by the contralateral CUT stimulation in the early-stance phase of walking. The background EMG activity of the soleus muscle was equivalent between standing and walking tasks and was unaffected by CUT stimulation alone. These findings suggest that the crossed CUT volleys can affect the presynaptic inhibition of the soleus Ia afferents and differentially modulate the excitability of the soleus H-reflex in a task-dependent manner during standing and walking. (AU) | |
| Processo FAPESP: | 12/05304-5 - Efeitos da ativação cutânea sobre a modulação de reflexos contralaterais durante a marcha em humanos |
| Beneficiário: | Rinaldo André Mezzarane |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado |