Wiktionary
n. (context neurosurgery English) Surgical removal of a hemisphere of the brain, usually performed to control otherwise uncontrollable epilepsy.
Wikipedia
Hemispherectomy is a very rare surgical procedure where one cerebral hemisphere (half of the brain) is removed or disabled. This procedure is used to treat a variety of seizure disorders where the source of the epilepsy is localized to a broad area of a single hemisphere of the brain, notably Rasmussen's encephalitis. It is solely reserved for extreme cases in which the seizures have not responded to medications or other less invasive surgeries. Common reported complications of a hemispherectomy include: hydrocephalus, subdural fluid collections, CSF leakage, deep and superficial infections.
Usage examples of "hemispherectomy".
Patients with lesions of the right temporal lobe or right hemispherectomies are significantly impaired in musical but not in verbal ability- in particular in the recognition and recall of melodies.