Journal article
Primary writing tremor: Motor cortex reorganisation and disinhibition
Journal of Clinical Neuroscience, Vol.12(1), pp.102-104
2005
Abstract
Background
Primary writing tremor (PWT) is a task-specific tremor of uncertain origin. There has been debate as to whether PWT represents a variant of essential tremor or a tremulous form of focal dystonia related to writer’s cramp. In writer’s cramp there is evidence of changes in intracortical inhibition (ICI), as well as cortical motor reorganisation.
Objective
To study corticomotor organisation and short-latency ICI in a patient with typical task-specific PWT.
Methods
Transcranial magnetic stimulation mapping of the corticomotor representation of the hand and studies of ICI using paired-pulse stimulation were performed in a 47-year-old right-handed woman with a pure task-specific writing tremor.
Results
The motor maps for the hand were displaced posteriorly on both sides and reverted to a normal position after treatment with botulinum toxin. Short-latency ICI was reduced for the dominant hand.
Conclusion
The findings indicate reorganisation and disinhibition of the corticomotor projection to the hand and point to the participation of cortical centres in the origin of PWT.
Details
- Title
- Primary writing tremor: Motor cortex reorganisation and disinhibition
- Authors/Creators
- M.L. Byrnes (Author/Creator) - The University of Western AustraliaF.L. Mastaglia (Author/Creator) - The University of Western AustraliaS.E. Walters (Author/Creator) - Centre for Neuromuscular and Neurological DisordersS-A.R. Archer (Author/Creator) - Centre for Neuromuscular and Neurological DisordersG.W. Thickbroom (Author/Creator) - Centre for Neuromuscular and Neurological Disorders
- Publication Details
- Journal of Clinical Neuroscience, Vol.12(1), pp.102-104
- Publisher
- Churchill Livingstone
- Identifiers
- 991005540095507891
- Copyright
- © 2004 Elsevier Ltd.
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- Citation topics
- 1 Clinical & Life Sciences
- 1.247 Migraines & Headaches
- 1.247.1001 Botulinum Toxin
- Web Of Science research areas
- Clinical Neurology
- Neurosciences
- ESI research areas
- Neuroscience & Behavior