Neck Muscles

Question 1

where does the sternocleidomastoid insert?

Answer 1

inserts at the mastoid process of the temporal bone and the superior nuchal line of the occipital bone

Question 2

What innervates the sternocleidomastoid?

Answer 2

spinal accessory nerve CN 11

Question 3

What are the actions of the sternoclediomastoid?

Answer 3

tilts head to same side and rotates head to opposite side

Question 4

What part of the trap is part of the posterior cervical triangle?

Answer 4

Descending.

Question 5

Anterior scalene

Answer 5

Originates at the anterior tubercles of transverse process of C3 to C5
Inserts at scalene tubercles of 1st ribs
innervated by the cervical and brachial plexuses
bends cervical spine to same side and bilaterally flexes neck

Question 6

middle scalene

Answer 6

originates at transverse process of C1 - C2 and posterior tubercles of transverse processes of C3-C7

inserts at the 1st rib

innervation and action the same as anterior and posterior

Question 7

posterior scalene

Answer 7

originates at the posterior tubercles of transverse processes of C5-C7
inserts at the outer surface of the 2nd rib

Question 8

What is the origin of the sternocleidomastoid ?

Answer 8

sternal head originates at the sternum and the clavicular head originates at the medial one third of the clavicle