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Self-paced and externally triggered rhythmical lower limb movements: a functional MRI study.

Graphical abstractThe subjects were fixed face-up to an MRI bed and performed lower limb movements. The results showed that the basal ganglia and the thalamus were selectively recruited for the self-paced lower limb movement, and the SMA (supplementary motor area), SMC (sensorimotor cortex) and CB (... Full description

Journal Title: Neuroscience letters May 10, 2012, Vol.516(1), pp.39-44
Main Author: Toyomura, Akira
Other Authors: Shibata, Midori , Kuriki, Shinya
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: E-ISSN: 1872-7972 ; DOI: 10.1016/j.neulet.2012.03.049
Link: http://search.proquest.com/docview/1010233011/?pq-origsite=primo
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title: Self-paced and externally triggered rhythmical lower limb movements: a functional MRI study.
format: Article
creator:
  • Toyomura, Akira
  • Shibata, Midori
  • Kuriki, Shinya
subjects:
  • Biological Clocks–Physiology
  • Brain–Physiology
  • Cortical Synchronization–Physiology
  • Gait–Physiology
  • Humans–Physiology
  • Leg–Physiology
  • Magnetic Resonance Imaging–Physiology
  • Male–Physiology
  • Nerve Net–Physiology
  • Volition–Physiology
  • Young Adult–Physiology
ispartof: Neuroscience letters, May 10, 2012, Vol.516(1), pp.39-44
description: Graphical abstractThe subjects were fixed face-up to an MRI bed and performed lower limb movements. The results showed that the basal ganglia and the thalamus were selectively recruited for the self-paced lower limb movement, and the SMA (supplementary motor area), SMC (sensorimotor cortex) and CB (cerebellum) were involved in both self-paced and externally triggered movements. Highlights► Self-paced and externally triggered lower limb movements were investigated in fMRI. ► Subjects were fixed to an MRI bed and performed movements that mimicked walking. ► The cortical motor areas and the cerebellum were involved in both types of movement. ► The basal ganglia was selectively recruited for the self-paced lower limb movement. Self-paced rhythmical lower limb movement is an important component of locomotive motion in humans. External stimuli are known to facilitate the generation of rhythmical motion. The importance of such self-paced and externally triggered movements is widely recognized, and these movements of the upper limbs have been studied in detail. However, the difference in neural mechanisms between the self-paced and externally triggered movements of the lower limbs is not clear even in healthy subjects. The present study investigated the neural regions involved in the lower limb movements by using functional magnetic resonance imaging (fMRI). The subjects were fixed face-up to an MRI bed and performed lower limb movements that mimicked walking under self-paced and externally triggered conditions. The results showed that the supplementary motor area, sensorimotor cortex and cerebellum were involved in both types of movement, but the basal ganglia and the thalamus were selectively recruited for the self-paced lower limb movement. These results are compatible with those of previous studies on the control of the lower limbs, and on upper limb movement under self-paced and externally triggered conditions.
language: eng
source:
identifier: E-ISSN: 1872-7972 ; DOI: 10.1016/j.neulet.2012.03.049
fulltext: fulltext
issn:
  • 18727972
  • 1872-7972
url: Link


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titleSelf-paced and externally triggered rhythmical lower limb movements: a functional MRI study.
creatorToyomura, Akira ; Shibata, Midori ; Kuriki, Shinya
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ispartofNeuroscience letters, May 10, 2012, Vol.516(1), pp.39-44
identifierE-ISSN: 1872-7972 ; DOI: 10.1016/j.neulet.2012.03.049
subjectBiological Clocks–Physiology ; Brain–Physiology ; Cortical Synchronization–Physiology ; Gait–Physiology ; Humans–Physiology ; Leg–Physiology ; Magnetic Resonance Imaging–Physiology ; Male–Physiology ; Nerve Net–Physiology ; Volition–Physiology ; Young Adult–Physiology
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descriptionGraphical abstractThe subjects were fixed face-up to an MRI bed and performed lower limb movements. The results showed that the basal ganglia and the thalamus were selectively recruited for the self-paced lower limb movement, and the SMA (supplementary motor area), SMC (sensorimotor cortex) and CB (cerebellum) were involved in both self-paced and externally triggered movements. Highlights► Self-paced and externally triggered lower limb movements were investigated in fMRI. ► Subjects were fixed to an MRI bed and performed movements that mimicked walking. ► The cortical motor areas and the cerebellum were involved in both types of movement. ► The basal ganglia was selectively recruited for the self-paced lower limb movement. Self-paced rhythmical lower limb movement is an important component of locomotive motion in humans. External stimuli are known to facilitate the generation of rhythmical motion. The importance of such self-paced and externally triggered movements is widely recognized, and these movements of the upper limbs have been studied in detail. However, the difference in neural mechanisms between the self-paced and externally triggered movements of the lower limbs is not clear even in healthy subjects. The present study investigated the neural regions involved in the lower limb movements by using functional magnetic resonance imaging (fMRI). The subjects were fixed face-up to an MRI bed and performed lower limb movements that mimicked walking under self-paced and externally triggered conditions. The results showed that the supplementary motor area, sensorimotor cortex and cerebellum were involved in both types of movement, but the basal ganglia and the thalamus were selectively recruited for the self-paced lower limb movement. These results are compatible with those of previous studies on the control of the lower limbs, and on upper limb movement under self-paced and externally triggered conditions.
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