Depressor anguli oris muscle

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The depressor anguli oris muscle is a muscle of the face used in facial expression to create a frown.

Contents

Origin

The depressor anguli oris originates from the mandible, on the outer surface, posterior to the oblique line.

Insertion

The depressor anguli oris inserts at the modiolus of the mouth.

Action

The depressor anguli oris depresses the corners of the mouth and draws the angle of the mouth laterally in a frowning motion.

Innervation

The depressor anguli oris is innervated by the mandibular branch of the facial nerve (CN VII).

Word origin

The depressor anguli oris muscle gets its name from the action it performs. Depressor means to depress or lower, anguli means angle, and oris means mouth; so the name means the muscle that lowers the angle of the mouth.

See also

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