胸鎖乳突肌

Key facts

Pronunciation

( / ˌ s t ɜːr n oʊ ˌ k l aɪ d ə ˈ m æ s ˌ t ɔɪ d , - n ə -, - d oʊ -/ )

Origin

Manubrium and medial portion of the clavicle

Insertion

Mastoid process of the temporal bone , superior nuchal line

Artery

Occipital artery and the superior thyroid artery

Nerve

Motor: spinal accessory nerve , sensory: cervical plexus , Proprioceptive: ventral primary rami of C2 and C3

Actions

Unilaterally: contralateral cervical rotation, ipsilateral cervical flexion Bilaterally: cervical flexion, elevation of sternum and assists in forced inhalation.

Latin

musculus sternocleidomastoideus

Ta98

A04.2.01.008

via Wikipedia infobox

Wikidata facts

Image

Sternomastoid muscle animation small2.gif