dc.creator | Okai, Liria A. | |
dc.creator | Kohn, Andre Fabio | |
dc.date.accessioned | 2013-10-29T14:13:50Z | |
dc.date.accessioned | 2018-07-04T16:02:53Z | |
dc.date.available | 2013-10-29T14:13:50Z | |
dc.date.available | 2018-07-04T16:02:53Z | |
dc.date.created | 2013-10-29T14:13:50Z | |
dc.date.issued | 2012 | |
dc.identifier | REVISTA BRASILEIRA DE FISIOTERAPIA, SAO CARLOS SP, v. 16, n. 3, supl., Part 1, pp. 231-235, MAY-JUN, 2012 | |
dc.identifier | 1413-3555 | |
dc.identifier | http://www.producao.usp.br/handle/BDPI/36356 | |
dc.identifier | 10.1590/S1413-35552012005000024 | |
dc.identifier | http://dx.doi.org/10.1590/S1413-35552012005000024 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1630910 | |
dc.description.abstract | Background: 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.language | eng | |
dc.publisher | ASSOCIACAO BRASILEIRA PESQUISA POS-GRADUACAO FISIOTERAPIA-ABRAPG-FT | |
dc.publisher | SAO CARLOS SP | |
dc.relation | REVISTA BRASILEIRA DE FISIOTERAPIA | |
dc.rights | Copyright ASSOCIACAO BRASILEIRA PESQUISA POS-GRADUACAO FISIOTERAPIA-ABRAPG-FT | |
dc.rights | openAccess | |
dc.subject | PHYSICAL THERAPY | |
dc.subject | POSTURE | |
dc.subject | FOOT | |
dc.subject | HUMAN | |
dc.subject | ELECTROMYOGRAPHY | |
dc.subject | MOTOR ACTIVITY | |
dc.title | Changes in FDB and soleus muscle activity after a train of stimuli during upright stance | |
dc.type | Artículos de revistas | |