Videos of atonic-myoclonic-absence seizures and myoclonic-absence seizures Case three: 2 year old boy showing two atonic-myoclonic-absence seizures at home



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NEUROLOGY/2014/577221

Videos of atonic-myoclonic-absence seizures and myoclonic-absence seizures

Case three: 2 year old boy showing two atonic-myoclonic-absence seizures at home

Video 1– 54 seconds: Part A 31 seconds Clinical seizure onset at 19 seconds; Part B Clinical seizure onset at 40 seconds

Part A 2 year old boy is standing watching television intently with a spoon in his left hand. His eyes suddenly deviate upwards and he vocalizes as he crashes to the floor with atonia. He lands on his back with his legs in the air, his hands fling open and the spoon is dropped. His knees and arms flex and there are rhythmic beats of upper limb myoclonus. Consciousness returns rapidly with sobbing.

Part B The boy is seated watching television intently. He has a myoclonic jerk involving his face and upper limbs coupled with rapid elevation of his eyes. His head and body fall suddenly backwards with atonia and his upper limbs abduct with fingers extended. Oral automatisms are noted, followed by bilateral myoclonic jerks associated with ratcheting abduction of the upper limbs.

Case four: 5 year old boy showing atonic-myoclonic-absence seizures

Video 2 – 18 seconds - Part A Clinical seizure onset at six seconds

The boy sits in bed playing a video game during video-EEG monitoring. There is clonic activity of his head associated with neck extension and atonia. His eyes deviate upwards with loss of facial expression. The upper limbs show myoclonic jerks with some flexion. There is rapid return of full awareness as he returns to playing the game.



Video 3 -10 seconds - Part B Clinical seizure onset at two seconds

The boy sits in bed watching the television. Myoclonus is seen in his left upper limb in concert with an atonic component, myoclonic movements of his neck and eye elevation.



Video 4 - -10 seconds - Part C Clinical seizure onset at three seconds

The boy sits in bed playing a board game with his mother. Bilateral upper limb abduction with rhythmic myoclonus is associated with myoclonic truncal extension and an atonic component.



Case five: Boy showing atonic-myoclonic-absence seizures at 7 years, myoclonic-absence seizures at 14 and an absence seizure at 18 years

Video 5 -25 seconds - Part A Clinical seizure onset at one second

7 year old boy self inducing seizures by bringing his face within centimeters of the television screen. An atonic headnod is accompanied by eye elevation and upper limb myoclonus. He then resumes stares intently at the television.


In the second part of the video, he again brings his face close to the television screen. He has recurrent atonic headnods at six seconds accompanied by upper limb myoclonic seizures often occurring in series with abduction.

Video 6 – 5 seconds - Part B – EEG monitoring - Clinical seizure onset at two seconds

14 years old. Patient rubs his eyes with his right hand. The seizure begins with abrupt, ratchet-like myoclonus in both arms and both legs.



Video 7 – 22 seconds - Part C – at home clinical seizure onset at seven and twenty seconds

18 years old. Two myoclonic absence seizures are seen without a preceding atonic component.



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