- 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