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Alternating Hemiplegia

Background

Alternating hemiplegia is a condition which has transient weakness of either, or sometimes both, sides of the body. The attacks may alternate or sometimes overlap, that is the second side is affected before the first recovers. Attacks start in the first year of life and are often accompanied by unusual irregular eye movements. The attacks last from less than an hour which is unusual to sometimes several days. When the attacks are prolonged the manifestations are not apparent during sleep or for the first fifteen to twenty minutes on waking when they then return. This is a very characteristic finding and when there are bilateral attacks this may allow feeding and drinking to occur in that short clear period after waking. The episodes of hemiplegia are not epileptic in nature but epileptic seizures may co-exist and require separate anti-epileptic drug treatment.

How is it caused? View How is it caused?

Medical text written January 1994 by Dr J Wilson, Consultant Neurologist (retired - formerly of Great Ormond Street, Hospital, London, UK). Last updated June 2000 by Professor B Neville. Last reviewed October 2004 by Professor B Neville, Professor of Childhood Epilepsy, Institute of Child Health, London, UK.

 

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