Risorius muscle

Authors

Affiliations

Nathaniel Yomogida, B.S., SPT

Doctor of Physical Therapy

B.S. in Kinesiology

Chloë Kerstein, B.S., SPT

Doctor of Physical Therapy

B.A. in Neuroscience

OIAN

Muscle	Origin	Insertion	Nerve	Action
Risorius	/The Archive/Anatomy/Skeletal Muscles/Head and Neck/Muscles of Facial Expression/risorius.html#origin	/The Archive/Anatomy/Skeletal Muscles/Head and Neck/Muscles of Facial Expression/risorius.html#insertion	?var:ref-risorius.nerve	/The Archive/Anatomy/Skeletal Muscles/Head and Neck/Muscles of Facial Expression/risorius.html#action

Origin

Fascia over masseter¹

Insertion

Skin of corner of the mouth¹

Innervation

Facial Nerve CN VII¹

Action

Retracts corner of mouth as in grimacing¹

Clinical Significance

1.

Gilroy AM, MacPherson BR, Wikenheiser JC, Voll MM, Wesker K, Schünke M, eds. Atlas of Anatomy. 4th ed. Thieme; 2020.