Superior auricular

Superior Auricular is a term used in anatomy to refer to a muscle or group of muscles located near the ear. The superior auricular muscle, also known as the auricularis superior muscle, is one of the three auricular muscles that control the movements of the ear.

Anatomy

The superior auricular muscle is the smallest of the three auricular muscles. It is a thin, fan-shaped muscle that originates from the galea aponeurotica, a tough layer of dense fibrous tissue that covers the upper part of the cranium. The muscle fibers run upward and insert into the upper part of the auricle, the visible part of the ear.

The superior auricular muscle is innervated by the facial nerve, which controls the muscles of facial expression. Despite its presence in the human anatomy, the superior auricular muscle is often considered vestigial, as it does not have a significant function in humans. In some animals, however, this muscle plays a crucial role in moving the ears to detect sounds.

Function

In humans, the superior auricular muscle does not contribute significantly to ear movement. However, some individuals can voluntarily control this muscle to move their ears. The primary function of the superior auricular muscle, along with the other auricular muscles, is believed to be the amplification and direction of sounds towards the ear canal.

Clinical significance

While the superior auricular muscle is not associated with any specific diseases or conditions, its presence can be relevant in surgical procedures involving the ear or the side of the head. Knowledge of the anatomy of the auricular muscles can be important in procedures such as otoplasty, a type of cosmetic surgery to change the shape or size of the ears.

See also

• Auricular muscles
• Facial nerve
• Galea aponeurotica