Supplementary motor area (SMA) seizures
Evidence-based neurology checklist on supplementary motor area (sma) seizures: Main manifestations These present with sudden and brief tonic posturing These involve the extremities and the trunk They usually manifest in sleep The posturing may spread from one body part to another The spread occurs…
Main manifestations
- These present with sudden and brief tonic posturing
- These involve the extremities and the trunk
- They usually manifest in sleep
- The posturing may spread from one body part to another
- The spread occurs over 5-10 seconds
- The posturing may be bilateral
- There is no post-ictal confusion
- Adversive posturing and loss of consciousness may occur with secondary generalization
Other manifestations
Investigations
Treatment
References
- Ohara S, Ikeda A, Kunieda T, et al. Propagation of tonic posturing in supplementary motor area (SMA) seizures. Epilepsy Res 2004; 62:179-187.
- Morris HH 3rd, Dinner DS, Lüders H, Wyllie E, Kramer R. Supplementary motor seizures: clinical and electroencephalographic findings. Neurology 1988; 38:1075-1082.
- Connolly MB, Langill L, Wong PK, Farrell K. Seizures involving the supplementary sensorimotor area in children: a video-EEG analysis. Epilepsia 1995; 36:1025-1032.
- Iwasaki M, Nakasato N, Shamoto H, Tominaga T. Surgical treatment of non-lesional supplementary motor area epilepsy: two case reports. No Shinkei Geka 2009; 37:293-298.
- Fukuda M, Masuda H, Honma J, Fujimoto A, Kameyama S, Tanaka R. Ictal SPECT in supplementary motor area seizures. Neurol Res 2006; 28:845-848.
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