Sternocleidomastoid Anatomy: Origin, Insertion & Action

⭐ Sternocleidomastoid Muscle Anatomy ⭐
💪 Origin: Sternal Head: Manubrium of sternum (superior and anterior aspect). Clavicular Head: Medial quarter of clavicle’s superior surface.
💪 Insertion: Mastoid process of temporal bone & anterior portion of superior nuchal line.
💪 Action: Unilateral contraction: Ipsilateral flexion and contralateral rotation. Bilateral contraction: Head/neck extension, head/neck flexion, & assists in inspiration by elevating clavicle and manubrium of sternum.
💪 Nerve: Accessory nerve (CN XI) & branches of cervical plexus (C2-C3).
💪 Artery: Occipital artery, superior thyroid artery & suprascapular arteries.

Chapters:
0:00 - Intro
0:13 - Location & overview of the sternocleidomastoid
1:05 - Origin of the sternocleidomastoid
2:08 - Insertion of the sternocleidomastoid
3:52 - Actions of the sternocleidomastoid

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https://bodyworksprime.com/sternoclei...

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