ABSTRACT
The aim of this paper is to study the clinical, electroencephalographic features, response to treatment and the outcome of juvenile myoclonic epilepsy in Libyan patients. A total of 12 patients with prevalence of 1.7% among 704 patients with epilepsies, 3 males [25%], 9 females [75%], age of onset is between [9-17 years] with a mean of 13.8 years, myoclonic jerks were the presenting symptoms in 7[58.4%] patients, 4[33.3%] of them their myoclonic jerks[MJ] were severe enough to make them fall down to the ground, generalized tonic clonic seizures [GTCS] in 5[41.6%] patients, one [8.3%] patient had symptoms of typical absence [TA] in association with the [MJ], no family history of epilepsy was found in all patients. Waking interictal electroencephalographic features showed normal background in all the 12[100%] patients, 3 [25%] patients were photosensitive with characteristic 4 HZ/sec spike and wave. All 12 [100%] patients responded well to small dose of sodium valproate 600mg/day and were seizure free for 3years. The out come in all the 12 [100%] patients showed relapse of the myoclonic jerks after the withdrawing of the treatment