STUDY Of Electromyographic Patterns Of
erector Spinae And Lower-limb Muscles
during Different Modalities Of Gait In
post-stroke Individuals

Nome: Flavia Aparecida Loterio
Tipo: Tese de doutorado
Data de publicação: 19/02/2019
Orientador:

Nomeordem decrescente Papel
Teodiano Freire Bastos Filho Orientador

Banca:

Nomeordem decrescente Papel
Adriano Almeida Gonçalves Siqueira Examinador Externo
Ana Cecilia Villa Parra Examinador Externo
Anselmo Frizera Neto Coorientador
Breno Valentim Nogueira Examinador Interno
Denis Delisle Rodriguez Examinador Externo
Teodiano Freire Bastos Filho Orientador

Resumo: Stroke is one of the leading causes of motor disability in the world. New technologies
have been developed to increase efficiency and reduce costs of rehabilitation of poststroke
individuals. Objective: To compare electromyographic patterns related to
muscle onset/offset, duration of activation and analysis of neuromuscular fatigue of
erector spinae (ES) and lower-limb muscles during different modalities of gait in poststroke
and healthy individuals. Methodology: The changes in the median frequency
(MDF) was analyzed during isometric tasks and walking on a treadmill in healthy
individuals (N = 10) to identify fatigue. Ten post-stroke and 30 healthy subjects
participated of the second stage of the study, in which ES and three lower-limb
muscles were analyzed during different gaits (walking on treadmill and ground, with
and without arm swing, and using a walker), with the neuromuscular fatigue analyzed
in stroke gait. Muscle analysis was also conducted with two post-stroke subjects
while using the UFES’s robotic walker. Results: For the healthy subjects, all the
lower-limb muscles showed reduction in their MDF during walking on treadmill.
Walking on treadmill had a stronger influence on the onset/offset muscles than the
arm swing in the healthy individuals. For post-stroke subjects, their ES muscles
presented a similar pattern to the healthy subjects, but the contralateral side had
longer activation near the toe-off than the ipsilateral side in both gaits. All the
observed changes in the activation for each phase indicated a longer duration of
activation of the post-stroke subjects. Regarding neuromuscular fatigue, it was not
possible to detect reduced MDF values for post-stroke individuals. The use of the
UFES’s robotic walker improved the symmetry of one post-stroke subject, and the
symmetry of duration of activation in the swing phase for all muscles of the other
subject. Conclusion: MDF changes were detected in non-strenuous exercises in
healthy subjects. ES muscle activation is not influenced by arm swing in healthy
individuals, with the same behavior in post-stroke individuals. As a finding of this
research, we concluded that trunk muscles can be used in rehabilitation processes
and also to control robotic devices for assistance or rehabilitation.

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