decerebration

noun

de·​cer·​e·​bra·​tion (ˌ)dē-ˌser-ə-ˈbrā-shən 

: loss of cerebral function (as from disease, trauma, or surgical cutting of the brain stem)

also : removal of the cerebrum (as by surgery)

decerebrate

(ˈ)dē-ˈser-ə-ˌbrāt 

transitive verb

decerebrated; decerebrating