Myology of the cervical region

Question 1

Origin of the trapezius?

Answer 1

Upper fibres: Medial 1/3 of the occipital protuberance, ligamentum nuchae, and spinous processes and supraspinous ligament of C7-T12

Middle fibres: Spinous processes of the thoracic vertebrae T1-T4

Lower fibres: Spinous processes of T4-T12

Question 2

Insertion of the trapezius?

Answer 2

Upper fibres: Lateral third of the clavicle

Middle fibres: Medial border of the acromion and the upper border of the scapular spine

Lower fibres: Medial end of the scapular spine

Question 3

Action of the trapezius?

Answer 3

Upper fibres: Bilaterally extends the neck, unilaterally side flexes ipsilaterally, unilaterally rotates the head contralaterally

Middle fibres: Retract the scapula

Lower fibres: Depress the scapula

Question 4

Innervation of the trapezius?

Answer 4

Spinal accessory nerve (XI)

Question 5

Origin of sternocleidomastoid?

Answer 5

Sternal head: Anterior surface of the manubrium

Clavicular head: Medial third of the clavicle

Question 6

Insertion of sternocleidomastoid?

Answer 6

Mastoid process and lateral 1/3 of the superior nuchal line

Question 7

Innervation of sternocleidomastoid?

Answer 7

Accessory nerve (XI) and anterior primary rami of C2 and C3

Question 8

Action of sternocleidomastoid?

Answer 8

Bilaterally: Flexes the neck, extends the head at the atlantooccipital joint
Unilaterally: Side flexes ipsilaterally and rotates head contralaterally

Question 9

Origin of anterior scalene?

Answer 9

Transverse processes of C3-C6

Question 10

Insertion of anterior scalene?

Answer 10

First rib

Question 11

Action of anterior scalene?

Answer 11

Bilaterally elevates the first rib during deep inhalation

Question 12

Innervation of anterior scalene?

Answer 12

Anterior primary rami of C4-C6

Question 13

Origin of middle scalenes?

Answer 13

TP of C1-C7

Question 14

Insertion of middle scalenes?

Answer 14

First rib

Question 15

Action of middle scalenes?

Answer 15

Bilaterally raises 1st rib during deep inspiration
Bilaterally flexes C vertebrae, unilaterally side flexes neck ipsilaterally

Question 16

Innervation of middle scalenes?

Answer 16

APR of C3-C8

Question 17

Origin of posterior scalenes?

Answer 17

TP of C4-C6

Question 18

Insertion of posterior scalenes?

Answer 18

2nd rib

Question 19

Action of posterior scalenes?

Answer 19

Bilaterally raises second rib during deep inspiration
Unilaterally side flexes neck ipsilaterally

Question 20

Origin of levator scapulae?

Answer 20

TP of C1-C4

Question 20

Innervation of posterior scalenes?

Answer 20

APR of C6-C8

Question 21

Insertion of levator scapulae?

Answer 21

Upper medial border of scapula

Question 22

Action of levator scapulae?

Answer 22

Elevates, retracts, and medially rotates the pectoral girdle
Laterally flexes and extends the neck

Question 23

Innervation of levator scapulae?

Answer 23

Dorsal scapula nerve (C5)

Question 24

Origin of longus colli?

Answer 24

Lower part: Bodies of T1-T3 Middle part: Bodies of C5-T3 Upper part: TP of C3-C5

Question 25

Insertion of longus colli?

Answer 25

Lower part: TP of C5-C6 Middle part: Bodies of C2-C4 Upper part: Anterior tubercle of the atlas

Question 26

Action of longus colli?

Answer 26

Flexes the neck

Question 27

Innervation of longus colli?

Answer 27

APR of C3-C6