Posterior auricular muscle

Posterior Auricular Muscle

The posterior auricular muscle is shown in red. Image courtesy of Wikimedia Commons.

The Posterior Auricular Muscle is a small muscle located near the ear in the human body. It is one of the muscles that make up the auricular group of muscles, which are responsible for the movement of the ear.

Anatomy

The posterior auricular muscle is a thin, fan-shaped muscle that originates from the mastoid process of the temporal bone and inserts into the lower part of the cranial surface of the auricle. It is innervated by the facial nerve.

Function

The primary function of the posterior auricular muscle is to move the ear backwards. This movement is often subtle and may not be noticeable in all individuals. The muscle is more developed and functional in some animals, where it plays a role in directing the ear towards sources of sound.

Clinical Significance

Damage to the facial nerve can result in paralysis of the posterior auricular muscle, leading to a condition known as Bell's Palsy. This can cause the ear to droop and lose its ability to move backwards.

See Also

• Auricular Muscles
• Facial Nerve
• Bell's Palsy