Is it ensure, insure, or assure?
decerebration de·cer·e·bra·tion (dē-sěr'ə-brā'shən)
The elimination of cerebral function in an animal by removing the cerebrum, cutting across the brain stem, or severing certain arteries in the brain stem, as may be done for experimentation.
decerebrate de·cer·e·brate (dē-sěr'ə-brāt', -brĭt)
Of, relating to, or characteristic of an individual who has suffered a brain injury that results in neurological function comparable to that resulting from decerebration of an animal. v. de·cer·e·brat·ed, de·cer·e·brat·ing, de·cer·e·brates (-brāt')
To eliminate cerebral brain function in an animal by decerebration.