Session 4 - L ife Sci 2C03 Session 4 Session 4...

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Life Sci 2C03 – Session 4 Session 4 – Electrophysiological Methods (cont…) Epilepsy 1. Definition: abnormal, synchronous, repetitive firing of a group of neurons in the brain 2. A single sinch even is called “seizure” 3. Multiple seizures are required to qualify the term “epilepsy” 4. Types: 1. Seizures generalized at the onset: 1. no clear focus; abnormal firing of neurons begins all over (entire brain fires synchronously) 2. e.g. Grand Mal epilepsy (tonic-clonic epilepsy) 1. jerky movements in all the limbs; contractions all over body leading to unconsciousness 1. e.g. Petit Mal epilepsy (absence epilepsy) 1. brief episodes of blank spells 1. can be several a day, but hardly noticed = subtle; easily treated and diagnosed 1. Focal Seizures (or Localiztion-related epilepsy) 1. These begin from a focus (seen in a particular region ) 2. Coupld spread over rest of the brain (focus-getting generalized) 3. E.g. Temporal Lobe Epilepsy (complex partial epilepsy) 1. Very common 2. Head injury (birth trauma) can lead to this
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This note was uploaded on 03/26/2011 for the course LIFESCI 2c03 taught by Professor Ullal during the Spring '11 term at McMaster University.

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Session 4 - L ife Sci 2C03 Session 4 Session 4...

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