Damage to the ulnar nerve results in "claw hand" and the inability to adduct or abduct the fingers "ape hand" and a diminished ability to oppose the thumb toward the little finger paralysis of the pronator teres and flexor pollicis longus muscles paralysis of the serratus anterior muscle

If the ulnar nerve is damaged, it could result to the following:

- a condition known as “claw hand”

- the inability to adduct or abduct the fingers "ape hand"

- a diminished ability to oppose the thumb toward the little finger

In simple terms, damage to the ulnar nerve results in the inability to flex the wrist.

fumikage isn't really a bird, and tsuyu does have teeth. tsuyu has a transformation quirk which still allows her to be partially human. otherwise we'd have a large frog running around. fumikage has teeth because again, he isn't a bird. his head was a quirk mixture if i'm correct.