Musculus adductor pollicis

The video tutorial discusses the adductor pollicis muscle, focusing on its structure, innervation, and function. The muscle is part of the thenar muscles and is located on the radial side of the hand. It has two heads and attaches to the base of the thumb. The deep branch of the ulnar nerve innervates it. The muscle primarily performs thumb adduction and assists in thumb opposition and flexion.

Explain the innervation of the adductor pollicis muscle.

How does the adductor pollicis muscle contribute to thumb movement?