Head and Neck: (Muscles of mastication, anterior neck, lateral neck ...

Head and Neck: (Muscles of mastication, anterior neck, lateral neck) info

Name

Action

Masseter

Elevates mandible

Origin

Insertion

Zygomatic arch

Ramus mandible

Temporal lines of skull

Coronoid process mandible

Cranial nerve V Trigeminal

Temporalis

Elevates and retracts mandible

Anterior neck

Other muscles: lateral and medial pterygoids

Nerve

Sternocleidomastoid

Bilaterally: neck flexion Unilaterally: neck rotation away

Cranial nerve XI Spinal Accessory

Clavicular head: from medial condyle Sternal head: from manubrium

Mastoid process temporal bone

Lateral neck

Muscles of mastication

Group

Anterior, middle and posterior scalenes

Elevates ribs or flexes neck

Cervical spinal nerves

Transverse processes of cervical vertebrae

Lateral superior 1st and 2nd ribs