fMRI Studies of the Dynamics of Human Brain Reactions on Execution of Voluntary Movements
| Autor: | V. L. Ushakov, D. A. Devet’yarov, R. S. Medvednik, Yu. N. Semenova, M. V. Ublinskii, Alexey Sedov, N. A. Semenova, V. V. Zav’yalova, T. A. Akhadov |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Supplementary motor area Brain activity and meditation General Neuroscience Thalamus Human brain Premotor cortex 03 medical and health sciences 030104 developmental biology 0302 clinical medicine medicine.anatomical_structure Motor system Basal ganglia medicine Psychology Operculum (brain) Neuroscience 030217 neurology & neurosurgery |
| Zdroj: | Neuroscience and Behavioral Physiology. 46:1031-1038 |
| ISSN: | 1573-899X 0097-0549 |
| Popis: | Event-related functional MRI (fMRI) was used to study the temporospatial dynamics of the activation of both cortical and subcortical brain formations in humans on execution of goal-directed movements triggered by verbal stimuli. Studies using this method showed that execution of voluntary movements was accompanied by signifi cant activation of various parts of the sensorimotor cortex (primary motor and somatosensory cortex, premotor cortex, supplementary motor area) and the insula and its adjacent structures (operculum) on the side contralateral to the arm being studied, as well as activation of various areas of the ipsilateral cerebellum. Of particular note were the marked reactions of the contralateral striopallidal complex and the ventral thalamus. The dynamics in the involvement of various brain areas in subjects in the phasic and tonic components of voluntary movements were determined. Differences were demonstrated in the dominant foci of brain activity in humans on clenching the right and left hands. These results widen our understanding of the mechanisms of the functioning of the human motor system and the roles of subcortical formations in organizing voluntary movements. |
| Databáze: | OpenAIRE |
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