a drug that causes loss of sensation
anesthetic
a drug that relieves pain
analgesic
a drug that opposes convulsions
anticonvulsant
a drug that opposes psychoses
antipsychotic
a drug that lessens anxiety
anxiolytic
removal of a piece of the skull
craniectomy
incision into the skull
craniotomy
removal of a nerve
neurectomy
destruction of nerve tissue
neurolysis
reconstruction of.a nerve
neuroplasty
suturing of a nerve (often the severed ends of a nerve)
neurorrhaphy