Answer:

cranial

Answer	Crossword Clue
CRANIAL	Pertaining to the skull
CRANIAL	Like the auditory and optic nerves, e.g.
CRANIAL	Of the skull

CRANIAL	Relating to head cases?
CRANIAL	Of the skull.
CRANIAL	Concerning the skull.
CRANIAL	Heady?
CRANIAL	Enclosing the brain
CRANIAL	Like an optic nerve
CRANIAL	One of 24 nerves
CRANIAL	Related to head cases

CRANIAL	Brainy?