Sign Up for a Free Account

This is an image preview.
Start a Free Account
to view the full image.

  • Nearly 3,000 illustrations, including video clips of neurologic disorders.

  • Every article is reviewed by our esteemed Editorial Board for accuracy and currency.

  • Full spectrum of neurology in 1,200 comprehensive articles.

Myoclonic absence seizure of unknown (idiopathic) cause (EEG)

EEG recorded during two brief typical myoclonic absence seizures during hyperventilation occurring concomitant with an abrupt onset and offset of generalized spike-wave discharges. (10a) The patient’s head bent forward and left with a vague look, then there was a synchronous upward-abducted jerk of the upper limbs (right more than left) and right leg concomitant with brief unsteadiness. (Top arrow) The start of upper limb movement. (Low arrow) Body unsteadiness. (10b) Two similar but more brief clinical events occurred in consequence. (Contributed by Dr. Athanasios Covanis.)

Associated Disorders

  • Epilepsy with myoclonic absences
  • Facial (perioral and or eyebrow) myoclonia with absences
  • Perioral myoclonia with absences