Why muscles that move ear vestigial?

The muscles that move the ear are not vestigial. They are simply small and weak in humans because they do not serve any important function. In other animals, such as cats and dogs, these muscles are much larger and stronger and are used to help the animals locate the source of sounds.

In humans, the muscles that move the ear are called the auricular muscles. There are three of them: the anterior auricular muscle, the superior auricular muscle, and the posterior auricular muscle. The anterior auricular muscle is located on the front of the ear and is responsible for pulling the ear forward. The superior auricular muscle is located on the top of the ear and is responsible for pulling the ear up. The posterior auricular muscle is located on the back of the ear and is responsible for pulling the ear back.

These muscles are all innervated by the facial nerve. The facial nerve is also responsible for innervating the muscles of the face, neck, and scalp.

The auricular muscles are not vestigial in humans. They are simply small and weak because they do not serve any important function.