1. In an intellectual manner
   "cerebrally active" 
2. In the brain
   "bleeding cerebrally"

See also: cerebral

• at home
• at issue
• at large
• at last
• at least
• at leisure
• at length
• at loggerheads
• at long last
• at most
• at odds
• at once
• at one time
• at peace
• at present
• at random
• at rest
• at sea
• at sixes and sevens
• at stake
• at that place
• at the best
• at the drop of a hat
• at the least
• at the most