Sternocleidomastoid

Question 1

Sternocleidomastoid (ORIGIN)- sternal head and clavicular head

Answer 1

Sternal head: Manubrium of the sternum
Clavicular head: Medial third of the clavicle

Question 2

Sternocleidomastoid (INSERTION)

Answer 2

Mastoid process of the temporal bone and the lateral half of the superior nuchal line of the occipital bone

Question 3

Sternocleidomastoid (INNERVATION)

Answer 3

Spinal accessory nerve (Cranial Nerve XI) and branches of C2 and C3 (for proprioception)

Question 4

Sternocleidomastoid (BLOOD SUPPLY)

Answer 4

Occipital artery, superior thyroid artery, and suprascapular artery

Question 5

Sternocleidomastoid (ACTION)

Answer 5

Bend your neck and turn and tilt your head. It activates when you: Turn your head to face left or right. Tilt your head toward your right or left shoulder