Supplementary motor area
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At the time the article was created Frank Gaillard had no recorded disclosures.View Frank Gaillard's current disclosures
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- Biogen Australia Pty Ltd, Investigator-Initiated Research Grant for CAD software in multiple sclerosis: finished Oct 2021 (past)
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The supplementary motor area (SMA) is involved in preparing for voluntary movements carried out by the primary motor area (precentral gyrus).
The anterior and lateral surfaces are less precisely defined without unambiguous anatomical landmarks, even though cytoarchitectonic and histochemical differences have been described 2,3.
Damage to the SMA, for example following tumor resection, leads to supplementary motor area syndrome, which is characterized by 3,4:
postoperative contralateral hemiparesis
speech impairment (if dominant hemisphere)
These deficits are usually transient with resolution occurring over weeks to months 3,4.
- 1. Luders HO. Textbook of Epilepsy Surgery. CRC Press. (2008) ISBN:0203091701. Read it at Google Books - Find it at Amazon
- 2. Hiroshima S, Anei R, Murakami N, Kamada K. Functional localization of the supplementary motor area. (2014) Neurologia medico-chirurgica. 54 (7): 511-20. doi:10.2176/nmc.oa2012-0321 - Pubmed
- 3. Potgieser A, de Jong B, Wagemakers M, Hoving E, Groen R. Insights from the Supplementary Motor Area Syndrome in Balancing Movement Initiation and Inhibition. Front Hum Neurosci. 2014;8:960. doi:10.3389/fnhum.2014.00960 - Pubmed
- 4. Abel T, Buckley R, Morton R, Gabikian P, Silbergeld D. Recurrent Supplementary Motor Area Syndrome Following Repeat Brain Tumor Resection Involving Supplementary Motor Cortex. Neurosurgery. 2015;11 Suppl 3(0 3):447-55; discussion 456. doi:10.1227/NEU.0000000000000847 - Pubmed