Soleus activity in post-stroke subjects: movement sequence from standing to sit...

• Autor(es): Silva, Augusta ; Pinheiro, Ana Rita ; Sousa, Andreia S. P. ; Tavares, João Manuel ; Santos, Rubim ; Sousa, Filipa
• Data: 2012
• Identificador Persistente: http://hdl.handle.net/10400.22/1245
• Origem: Repositório Científico do Instituto Politécnico do Porto
• Assunto(s): Modulation of plantar flexors activity; Ipsilateral and contralateral limb; Postural control; Electromyography
• Tipo de Documento: Artigo
• Idioma: Inglês

Descrição

O documento em anexo encontra-se na versão post-print (versão corrigida pelo editor). Introduction: The beginning of the movement sequence from standing to sitting requires the modulation of plantar flexors activity, including soleus muscle (SOL), to allow the forward translation of the tibia in relation to the foot, preserving its antigravity function. Purpose: To analyze the SOL activity during the initial phase of standing to sitting in stroke subjects. Methods: Two groups of ten subjects each participated in this study, one composed by healthy subjects and the other with subjects with history of stroke. Electromyographic activity (EMGa) of SOL was analyzed in ipsilateral (IPSI) and contralateral (CONTRA) limb to side lesion in stroke subjects, and in one limb in healthy subjects during the initial phase of standing to sitting. A force plate was used to identify the movement sequence phase. Results: The mean values of SOL EMGa were higher in healthy subjects than the ones obtained in IPSI and CONTRA limb in stroke subjects. Significance differences were only was observed between the IPSI and healthy limb (p=0.035). Conclusion: When compared to the healthy subjects, stroke subjects showed a decreased SOL EMGa in IPSI limb, which suggests that therapeutic decisions must consider the need to promote a better postural control also in the IPSI limb.