dc.creatorOkai, Liria A.
dc.creatorKohn, Andre Fabio
dc.date.accessioned2013-10-29T14:13:50Z
dc.date.accessioned2018-07-04T16:02:53Z
dc.date.available2013-10-29T14:13:50Z
dc.date.available2018-07-04T16:02:53Z
dc.date.created2013-10-29T14:13:50Z
dc.date.issued2012
dc.identifierREVISTA BRASILEIRA DE FISIOTERAPIA, SAO CARLOS SP, v. 16, n. 3, supl., Part 1, pp. 231-235, MAY-JUN, 2012
dc.identifier1413-3555
dc.identifierhttp://www.producao.usp.br/handle/BDPI/36356
dc.identifier10.1590/S1413-35552012005000024 
dc.identifierhttp://dx.doi.org/10.1590/S1413-35552012005000024 
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1630910
dc.description.abstractBackground: Evidence of self-sustained muscle activation following a brief electrical stimulation has been reported in the literature for certain muscles. Objectives: This report shows that the foot muscle (Flexor Digitorum Brevis - FDB) shows a self-sustained increase in muscle activity during upright stance in some subjects following a train of stimuli to the tibial nerve. Methods: Healthy subjects were requested to stand upright and surface EMG electrodes were placed on the FDB, Soleus and Tibialis Anterior muscles. After background muscle activity (BGA) acquisition, a 50 Hz train of stimuli was applied to the tibial nerve at the popliteal fossa. The root mean square values (RMS) of the BGA and the post-stimulus muscle activation were computed. Results: There was a 13.8% average increase in the FDB muscle EMG amplitude with respect to BGA after the stimulation was turned off. The corresponding post-stimulus Soleus EMG activity decreased by an average of 9.2%. We hypothesize that the sustained contraction observed in the FDB following stimulus may be evidence of persistent inward currents (PIC) generated in FDB spinal motoneurons. The post-stimulus decrease in soleus activity may have occurred due to the action of inhibitory interneurons caused by the PICs, which were triggered by the stimulus train. Conclusions: These sustained post-stimulation changes in postural muscle activity, found in different levels in different subjects, may be part of a set of possible responses that contribute to overall postural control.
dc.languageeng
dc.publisherASSOCIACAO BRASILEIRA PESQUISA POS-GRADUACAO FISIOTERAPIA-ABRAPG-FT
dc.publisherSAO CARLOS SP
dc.relationREVISTA BRASILEIRA DE FISIOTERAPIA
dc.rightsCopyright ASSOCIACAO BRASILEIRA PESQUISA POS-GRADUACAO FISIOTERAPIA-ABRAPG-FT
dc.rightsopenAccess
dc.subjectPHYSICAL THERAPY
dc.subjectPOSTURE
dc.subjectFOOT
dc.subjectHUMAN
dc.subjectELECTROMYOGRAPHY
dc.subjectMOTOR ACTIVITY
dc.titleChanges in FDB and soleus muscle activity after a train of stimuli during upright stance
dc.typeArtículos de revistas


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