unit 4 ana

Frontalis m.

Draw scalp anteriorly, raise eyebrows, wrinkle forehead - CN VII facial n.

Occipitalis m.

Draw scalp posteriorly - CN VII facial n.

Orbicularis oculi m.

Close the eye - CN VII facial n.

Orbicularis oris m.

Close and protrude lips - CN VII facial n.

Buccinator m.

Press cheek against teeth - CN VII facial n.

Platysma m.

Tense skin of neck, draw part of lower lip inferiorly and posteriorly - CN VII facial n.

Masseter m.

Elevates mandible - CN V3 mandibular division of trigeminal nerve

Temporalis m.

Elevates and retracts mandible - CN V3 (mandibular division of the trigeminal n.)

Medial prerygoid m.

Elevate, protract, and move mandible side to side - CN V3 (mandibular division of trigeminal n.)

Lateral pterygoid m.

Depress, protract, and move mandible side to side - CN V3 (mandibular division of trigeminal n.)

Trapezius m.

Elevate, retract, and depress scapula - CN XI accessory n.

Sternocleidomastoid m.

Bilateral flexion of vertebral column and unilateral rotation of head - CN XI accessory n.

Suprahyoid mm.

Depress the mandible and elevate the hyoid bone - superior to hyoid bone

Infrahyoid mm.

Stabilizes or depress the hyoid bone - inferior to the hyoid bone

Styloglossus m.

Pulls the tongue posteriorly (retract) - CN XII Hypoglossal nerve

Hyoglossus m.

Pulls the tongue down (depression) - CN XII hypoglossal n.

Genioglossus m.

Pulls the tongue out of the mouth (protrudes) - CN XII Hypoglossal n.

Superior rectus m.

Elevation of eyeball - CN III oculomotor n.

Inferior rectus m.

Depression of eyeball - CN III oculomotor n.

Medial rectus m.

Adduction of eyeball - CN III oculomotor n.

Lateral rectus m.

Abduction of eyeball - CN VI abducens n.

Superior oblique m.

Depression and abduction of eyeball - CN IV trochlear n.

Inferior oblique m.

Elevation and abduction of eyeball - CN III oculomotor