Nursing management of patients with the neurological disorder and disease. Explain the selected key terms. 1) Explain/Define Craniotomy. (Define craniotomy) Craniotomy is a type of surgical procedure in which a small hole (opening) is made in the skull bone to perform different types of medical procedures in the brain. 2) Explain/Define craniectomy. A craniectomy is a surgical procedure in which a small portion of the skull bone is removed. 3)