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 ⭐ Want to learn more about the sternocleidomastoid? Then check out the full article on the Bodyworks Prime website: https://bodyworksprime.com/sternoclei... ⭐ If you would like some help memorising the sternocleidomastoid's information then be sure to check out the free flashcards here: https://bodyworksprime.com/sternoclei... #BodyworksPrime #Anatomy #Sternocleidomastoid