Self‐Paced Versus Metronome‐Paced 7 Finger Movements
- 1 July 1997
- journal article
- Published by Wiley in Journal of Neuroimaging
- Vol. 7 (3), 145-151
- https://doi.org/10.1111/jon199773145
Abstract
To evaluate the hypothesis that self-paced movements are mediated primarily by the supplementary motor area, whereas externally triggered movements are mainly affected by the lateral premotor cortex, different movements in 6 healthy volunteers were studied while changes in regional cerebral blood flow (rCBF) were measured using positron emission tomography (PET) and 15O-labeled water. Subjects made a series of finger opposition movements initiated in a self-paced manner every 4 to 6 seconds, and separately, made continuous finger opposition movements at a frequency of 2 Hz paced by a metronome. The primary motor cortex, lateral area 6, cerebellum on both sides, and caudal cingulate motor area, and the putamen and thalamus on the contralateral side were more active during the metronome-paced movements. The increases in rCBF in these areas are likely the result of the larger number of movements per minute made with the externally triggered task. The anterior supplementary motor area and rostral cingulate motor area in the midline, prefrontal cortices bilaterally, and lobus parietalis inferior on the ipsilateral side were more active during the self-paced movements. Increases in rCBF in those areas, which include medial premotor structures, may be related to the increased time devoted to planning the movement in this condition.Keywords
This publication has 39 references indexed in Scilit:
- Self-initiated versus externally triggered movementsBrain, 1995
- Regional cerebral blood flow during a self-paced sequential finger opposition task in patients with cerebellar degenerationBrain, 1995
- Multiple representations of body movements in mesial area 6 and the adjacent cingulate cortex: An intracortical microstimulation study in the macaque monkeyJournal of Comparative Neurology, 1991
- Motor responses after transcranial electrical stimulation of cerebral hemispheres with a degenerated pyramidal tractAnnals of Neurology, 1991
- The functional anatomy of motor recovery after stroke in humans: A study with positron emission tomographyAnnals of Neurology, 1991
- Parallel Organization of Functionally Segregated Circuits Linking Basal Ganglia and CortexAnnual Review of Neuroscience, 1986
- Supplementary motor area structure and function: Review and hypothesesBehavioral and Brain Sciences, 1985
- Anatomical and physiological organization of the non-primary motor cortexTrends in Neurosciences, 1984
- A NEUROPHYSIOLOGICAL STUDY OF THE PREMOTOR CORTEX IN THE RHESUS MONKEYBrain, 1984
- Cortico-cortical connections in the rhesus monkeyBrain Research, 1969