Oblique muscle of auricle

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Oblique muscle of auricle

The oblique muscle of auricle (also known as oblique auricular muscle or musculus obliquus auriculae) is a small, intrinsic muscle of the outer ear. It is one of the auricular muscles that are responsible for the movement of the auricle, which is the visible part of the ear.

Anatomy

The oblique muscle of auricle is located on the cranial surface of the auricle. It originates from the upper part of the concha and inserts into the scapha, which is the groove between the helix and the antihelix.

Function

The primary function of the oblique muscle of auricle is to assist in the movement of the auricle. Although the movement of the auricle is generally limited in humans, these muscles are more functional in other animals, where they play a significant role in directing the ear towards sounds.

Innervation

The oblique muscle of auricle is innervated by the facial nerve (cranial nerve VII). This nerve is responsible for the motor control of the muscles of facial expression, including the auricular muscles.

Blood Supply

The blood supply to the oblique muscle of auricle is provided by branches of the posterior auricular artery, which is a branch of the external carotid artery.

Clinical Significance

While the oblique muscle of auricle has limited function in humans, it can be involved in certain medical conditions. For example, auricular hematoma can affect the muscles of the auricle, including the oblique muscle. Additionally, trauma or surgery involving the ear may impact the function of this muscle.

See Also

• Auricle (anatomy)
• Auricular muscles
• Facial nerve
• Posterior auricular artery