| Texto completo | |
| Autor(es): |
Tardelli, Gabriela P.
;
Souza, Victor H.
;
Matsuda, Renan H.
;
Garcia, Marco A. C.
;
Novikov, Pavel A.
;
Nazarova, Maria A.
;
Baffa, Oswaldo
Número total de Autores: 7
|
| Tipo de documento: | Artigo Científico |
| Fonte: | BRAIN TOPOGRAPHY; v. 35, n. 3, p. 15-pg., 2022-03-09. |
| Resumo | |
Most of the motor mapping procedures using navigated transcranial magnetic stimulation (nTMS) follow the conventional somatotopic organization of the primary motor cortex (M1) by assessing the representation of a particular target muscle, disregarding the possible coactivation of synergistic muscles. In turn, multiple reports describe a functional organization of the M1 with an overlapping among motor representations acting together to execute movements. In this context, the overlap degree among cortical representations of synergistic hand and forearm muscles remains an open question. This study aimed to evaluate the muscle coactivation and representation overlapping common to the grasping movement and its dependence on the stimulation parameters. The nTMS motor maps were obtained from one carpal muscle and two intrinsic hand muscles during rest. We quantified the overlapping motor maps in size (area and volume overlap degree) and topography (similarity and centroid Euclidean distance) parameters. We demonstrated that these muscle representations are highly overlapped and similar in shape. The overlap degrees involving the forearm muscle were significantly higher than only among the intrinsic hand muscles. Moreover, the stimulation intensity had a stronger effect on the size compared to the topography parameters. Our study contributes to a more detailed cortical motor representation towards a synergistic, functional arrangement of M1. Understanding the muscle group coactivation may provide more accurate motor maps when delineating the eloquent brain tissue during pre-surgical planning. (AU) | |
| Processo FAPESP: | 13/07699-0 - Centro de Pesquisa, Inovação e Difusão em Neuromatemática - NeuroMat |
| Beneficiário: | Oswaldo Baffa Filho |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |
| Processo FAPESP: | 18/11853-8 - Avaliação da sobreposição de mapas motores corticais de músculos relacionados com o movimento de preensão utilizando a estimulação magnética transcraniana |
| Beneficiário: | Gabriela Pazin Tardelli |
| Modalidade de apoio: | Bolsas no Brasil - Iniciação Científica |