In an attempt to deal with his severe, untreatable epileptic seizures, h. m. had portions of his including the brain structure called the surgically removed.

In an attempt to deal with his severe, untreatable epileptic seizures, H. M. had portions of his MEDIAL TEMPORAL LOBES, including the brain structure called the HIPPOCAMPUS surgically removed.

An epileptic seizure or epileptic fit or seizure or most commonly as fit refers to brief episodes of symptoms due to abnormal activities in the brain. Hippocampus is the portion of brain located in the cerebral cortex. It is associated with memory.