SYN1 gene mutation is an X-linked gene mutation that causes numerous pathological manifestations such as seizures and neurodevelopmental disorders. A few descriptions of this disease have been published in the last decade, but the electro-clinical features of epilepsy are still largely unknown. No analysis of electroencephalographic connectivity has yet been performed. The aim of this study is to perform a detailed electro-clinical seizure analysis and electroencephalographic analysis in patients with a SYN1 gene mutation, in an attempt to identify a characteristic pattern that would allow earlier diagnosis and better understanding and management of this disease.

Inclusion Criteria:

• Cases : SYN1 gene mutation, available electroencephalographic and clinical data.
• Controls : older than 12 years at the moment of the electroencephalogram recording, electroencephalogram considered as normal, no neurological disease (particularly no epilepsy), no neuroimaging abnormality.

Exclusion Criteria:

- Controls : younger than 12 years at the moment of the electroencephalogram recording, electroencephalogram considered as abnormal, neurological disease (particularly epilepsy), neuroimaging abnormality.

SYN1 gene mutation patients and controls