muscles of the neck

Question 1

sternocleidomastoid

Answer 1

O: sternal head: superior manubrium/ clavicular head: medial 1/3 of clavicle
I: Mastoid process of temporal bone/ lateral superior nuchal line
A: lateral flexion to same side (unilaterally)/rotation to opposite side/neck flexion (bilaterally)/ assists in deep inhalation
I: spinal accessory/CN XI

Question 2

longus colli

Answer 2

O: anterior surface of bodies of cervical and upper thoracic vertebrae
I: transverse processes of upper cervical vertebrae
A: neck flexion/lateral flexion/rotation to opposite side
I: ventral rami of C2-C6

Question 3

Anterior scalene

Answer 3

O: transverse processes of C3-6
I: inner border of 1st rib
A: lateral flexion to same side/rotation to opposite side
I: ventral rami of C4-6

Question 4

Middle scalene

Answer 4

O: transverse processes of C2-C7
I: upper surface of 1st rib
A: lateral flexion of neck
I: ventral rami of C3-8

Question 5

Posterior scalene

Answer 5

O: transverse processes of C4-6
I: outer surface of 2nd rib
A: lateral flexion of neck
I: ventral rami of C6-8