Facilitation of human first dorsal interosseous muscle responses to transcranial magnetic stimulation during voluntary contraction of the contralateral homonymous muscle

Autor:	A, Stedman, N J, Davey, P H, Ellaway
Rok vydání:	1998
Předmět:	Adult Male Motor Neurons Volition Pyramidal Tracts Middle Aged Evoked Potentials Motor Hand Transcranial Magnetic Stimulation Electric Stimulation Functional Laterality Humans Female Muscle Skeletal Muscle Contraction
Zdroj:	Musclenerve. 21(8)
ISSN:	0148-639X
Popis:	The size of compound motor evoked potentials (cMEPs) to transcranial magnetic stimulation of the motor cortex was measured in the relaxed first dorsal interosseous muscle of the nondominant hand (ndFDI) during different levels of voluntary contraction in the homonymous muscle of the dominant hand (dFDI). cMEP responses in the ndFDI became larger when the dFDI was contracted to forces ranging 10-70% of maximum voluntary contraction. Variability in the amplitude of the cMEP responses in ndFDI decreased when dFDI was contracted. Comparison with cMEPs to spinal cord stimulation suggested a large component of the facilitation was occurring at a cortical level. The amplitude of cMEP responses in ndFDI also increased when the tibialis anterior muscle of the leg on the contralateral side was contracted. The observed facilitation of motoneurons during contraction of contralateral muscles might involve a transcallosal pathway modulating the excitability of one cortex when the other is activated.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=pmid________::5ebc65cb87e9b72910fad3d69f962a49 https://pubmed.ncbi.nlm.nih.gov/9655121 Zobrazit plný text záznamu Plný text