Researchers were puzzled about how precise hearing ability could arise from a small ear structure.
en.wikipedia.org As a result, she was quadriplegic, could not speak, and had the mental abilities of an infant.
en.wikipedia.org As in the infantile form, mental abilities and coordination are affected.
en.wikipedia.org Neurologic examination should assess cognitive and mental abilities, cranial nerve function, motor function, deep tendon reflexes, sensory function, coordination, and gait (if appropriate).
en.wikipedia.org Depending upon characters' physical and mental abilities, they may learn such skills as brawling, bribery, swordsmanship, computers, interstellar navigation, spaceship piloting, and so on.
en.wikipedia.org