A Case of Startle Epilepsy and SSMA Seizures Documented with Subdural Recordings
Article first published online: 4 OCT 2006
Volume 40, Issue 7, pages 1031–1035, July 1999
How to Cite
Serles, W., Leutmezer, F., Pataraia, E., Olbrich, A., Gröppel, G., Czech, T. and Baumgartner, C. (1999), A Case of Startle Epilepsy and SSMA Seizures Documented with Subdural Recordings. Epilepsia, 40: 1031–1035. doi: 10.1111/j.1528-1157.1999.tb00813.x
- Issue published online: 4 OCT 2006
- Article first published online: 4 OCT 2006
- Accepted December 16, 1998.
- Startle epilepsy;
- Premotor cortex;
- Subdural grid recordings;
Summary: Purpose: To study the mechanisms of startle-induced supplementary sensorimotor area (SSMA) seizures.
Methods: We present a patient investigated with indwelling subdural grid electrodes covering both the SSMA and the dorsolateral frontal lobe.
Results: We found a simultaneous seizure onset in the right dorsolateral premotor cortex and the right SSMA. High-resolution magnetic resonance imaging (MRI) showed a small subcortical lesion adjacent to the right SSMA. The patient became seizure free after resection of the lesion and the ictalonset zone.
Conclusions: We conclude that an extended region of abnormally excitable tissue within the frontal lobe could facilitate the generation of startle-induced seizures. We speculate that a widespread epileptogenic zone could help to explain why some patients with SSMA or dorsolateral frontal lobe seizures are more likely to have startle-induced seizures.