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Ankle anticipatory postural adjustments during gait initiation in healthy and post-stroke subjects

2015-11Journal article Open access
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dc.contributor.authorPinheiro De Sousa, Andreia Sofia
dc.contributor.authorSilva, Augusta
dc.contributor.authorSantos, Rubim
dc.date.accessioned2016-01-13T15:45:05Z
dc.date.available2016-01-13T15:45:05Z
dc.date.issued2015-11
dc.description.abstractAnticipatory postural adjustments during gait initiation have an important role in postural stability but also in gait performance. However, these first phase mechanisms of gait initiation have received little attention, particularly in subcortical post-stroke subjects, where bilateral postural control pathways can be impaired. This study aims to evaluate ankle anticipatory postural adjustments during gait initiation in chronic post-stroke subjects with lesion in the territory of middle cerebral artery. Methods: Eleven subjects with post-stroke hemiparesis with the ability to walk independently and twelve healthy controls participated in this study. Bilateral electromyographic activity of tibialis anterior, soleus and medial gastrocnemius was collected during gait initiation to assess the muscle onset timing, period of activation/deactivation and magnitude of muscle activity during postural phase of gait initiation. This phase was identified through centre of pressure signal. Post-stroke group presented only half of the tibialis anterior relative magnitude observed in healthy subjects in contralesional limb (t=2.38, p=0.027) and decreased soleus deactivation period (contralesional limb, t=2.25, p=0.04; ipsilesional limb, t=3.67, p=0.003) as well its onset timing (contralesional limb, t=3.2. p=0.005; ipsilesional limb, t=2.88, p=0.033) in both limbs. A decreased centre of pressure displacement backward (t=3.45, p=0.002) and toward the first swing limb (t=3.29, p=0.004) was observed in post-stroke subjects. These findings indicate that chronic post-stroke subjects with lesion at middle cerebral artery territory present dysfunction in ankle anticipatory postural adjustments in both limbs during gait initiation.pt_PT
dc.identifier.citationSousa, A.S.P., A. Silva, and R. Santos, Ankle anticipatory postural adjustments during gait initiation in healthy and post-stroke subjects. Clinical Biomechanics; 30(9): 960-965.pt_PT
dc.identifier.doi10.1016/j.clinbiomech.2015.07.002pt_PT
dc.identifier.issn0268-0033
dc.identifier.urihttp://hdl.handle.net/10400.22/7391
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttp://www.clinbiomech.com/article/S0268-0033(15)00187-4/abstractpt_PT
dc.subjectGait initiationpt_PT
dc.subjectAnticipatory postural adjustmentspt_PT
dc.subjectStrokept_PT
dc.subjectAnkle musclespt_PT
dc.subjectCenter of pressurept_PT
dc.titleAnkle anticipatory postural adjustments during gait initiation in healthy and post-stroke subjectspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage965pt_PT
oaire.citation.issue30pt_PT
oaire.citation.startPage960pt_PT
oaire.citation.titleClinical Biomechanicspt_PT
oaire.citation.volume9pt_PT
person.familyNamePinheiro de Sousa
person.familyNameFerreira Silva
person.familyNameRubim Silva Santos
person.givenNameAndreia Sofia
person.givenNameMaria Augusta
person.givenNameManuel
person.identifier1070119
person.identifier1087589
person.identifier.ciencia-id2216-9200-7EF6
person.identifier.ciencia-idCE18-7090-9C5E
person.identifier.ciencia-idA018-2B24-C597
person.identifier.orcid0000-0001-9528-1463
person.identifier.orcid0000-0001-5018-6905
person.identifier.orcid0000-0002-7394-7604
person.identifier.ridC-7138-2019
person.identifier.scopus-author-id55950021600
person.identifier.scopus-author-id24482045400
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationaeecfe02-e80d-49ab-9033-a1ade15658f2
relation.isAuthorOfPublicationedfc4f79-82b7-4669-8fa1-220cc20aa495
relation.isAuthorOfPublication0a264044-a870-4fca-b976-f7ce003d23a8
relation.isAuthorOfPublication.latestForDiscoveryedfc4f79-82b7-4669-8fa1-220cc20aa495

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