Sleep seizures

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Clinic

  • Sleep-related hypermotor epilepsy (SHE), previously known as nocturnal frontal lobe epilepsy
  • It is a form of focal epilepsy characterized by seizures which arise during sleep.
  • The seizures are most typically characterized by complex motor behaviors.
  • It is associated with cognitive impairment


Symptoms

  • Seizures in SHE are brief and usually have an abrupt onset and offset.
  • Rapid, hyperkinetic movements as well as tonic/dystonic posturing of the limbs.
  • Brief arousals from sleep or wandering ambulatory behavior.
  • Non-motor manifestations (such as sensory or emotional phenomenon) are common and retained awareness during seizures may occur.
  • Many patients with SHE suffer from cognitive impairment and have behavioral/psychological problems.


Polysomnography can be helpful distinguishing SHE from parasomnias as they often arise from different stages of sleep.