description Theodore Rasmussen Overview
Theodore Brown Rasmussen was a Canadian neurosurgeon associated with the Montreal Neurological Institute. He helped characterize the rare inflammatory neurological disorder now called Rasmussen encephalitis, which typically causes seizures and progressive loss of function in one cerebral hemisphere. His work also advanced hemispherectomy and related operations for selected patients with severe epilepsy that could not be controlled with medication.
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What is Rasmussen's encephalitis?
It is a rare inflammatory brain disorder that usually affects one cerebral hemisphere and causes severe seizures and progressive neurological loss. Theodore Rasmussen and colleagues characterised the condition at the Montreal Neurological Institute.
How did Theodore Rasmussen advance epilepsy surgery?
Rasmussen refined methods for locating seizure-producing brain tissue and selecting patients for surgery. His work improved procedures ranging from focal resections to hemispherectomy.
Why can hemispherectomy help patients with Rasmussen's encephalitis?
When seizures arise relentlessly from one badly damaged hemisphere, disconnecting or removing affected tissue can stop their spread. The operation is reserved for severe cases because it produces major permanent neurological consequences.
Where did Theodore Rasmussen conduct his neurosurgical work?
He spent much of his career at the Montreal Neurological Institute in Canada. He later served as the institute's director, continuing the epilepsy programme associated with Wilder Penfield.
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