OP Group 1

Question 1

What is the origin of the trapezius?

Answer 1

EOP, nuchal line, nuchal ligament

Question 2

What is the insertion of the trapezius?

Answer 2

Lateral 1/3 of clavicle, acromion, spine of scapula

Question 3

What are the actions of the trapezius?

Answer 3

Unilateral: lateral flexion of head; Bilateral: extension of head, elevation of scapula, retraction of scapula, upward rotation of scapula, downward rotation of scapula

Question 4

What is the innervation of the trapezius?

Answer 4

(Spinal) accessory nerve (CN XI), cervical spinal nerves (dorsal rami)

Question 5

What is the origin of the sternocleidomastoid (SCM)?

Answer 5

Sternal head: manubrium of sternum; Clavicular head: medial portion of clavicle

Question 6

What is the insertion of the sternocleidomastoid (SCM)?

Answer 6

Mastoid process

Question 7

What are the actions of the sternocleidomastoid (SCM)?

Answer 7

Rotation of head to contralateral side; Lateral flexion to ipsilateral side; Bilateral action: neck flexion

Question 8

What is the innervation of the sternocleidomastoid (SCM)?

Answer 8

Motor: spinal accessory nerve (CN XI); Sensory: cervical spinal nerves (ventral rami)

Question 9

What is the origin of the anterior scalene?

Answer 9

TPs of C3-C6

Question 10

What is the insertion of the anterior scalene?

Answer 10

1st rib

Question 11

What are the actions of the anterior scalene?

Answer 11

Flexion and ipsilateral lateral flexion of neck; Elevation of 1st rib

Question 12

What is the innervation of the anterior scalene?

Answer 12

Cervical spinal nerves, ventral rami

Question 13

What is the origin of the levator scapulae?

Answer 13

TPs of C1-C4

Question 14

What is the insertion of the levator scapulae?

Answer 14

Medial border of scapula (superior part)

Question 15

What are the actions of the levator scapulae?

Answer 15

Elevation of scapula; Extension and lateral flexion of neck

Question 16

What is the innervation of the levator scapulae?

Answer 16

Dorsal scapular nerve

Question 17

What is the origin of the digastric muscle?

Answer 17

Posterior belly: mastoid process; Anterior belly: digastric fossa of mandible

Question 18

What is the insertion of the digastric muscle?

Answer 18

Hyoid bone (both bellies)

Question 19

What are the actions of the digastric muscle?

Answer 19

Elevation of hyoid bone; Depression of mandible; Stabilizes hyoid bone for infrahyoid action

Question 20

What is the innervation of the digastric muscle?

Answer 20

Posterior belly: facial nerve (CN VII); Anterior belly: trigeminal nerve (CN V)

Question 21

What is the origin of the splenius cervicis?

Answer 21

SPs of T3-6

Question 22

What is the insertion of the splenius cervicis?

Answer 22

TPs of C1-C3

Question 23

What are the actions of the splenius cervicis?

Answer 23

Unilateral: ipsilateral rotation and lateral flexion of neck; Bilateral: extension of neck

Question 24

What is the innervation of the splenius cervicis?

Answer 24

Cervical spinal nerves (dorsal rami)

Question 25

What is the origin of the sternohyoid?

Answer 25

Manubrium and sternoclavicular joint

Question 26

What is the insertion of the sternohyoid?

Answer 26

Body of hyoid bone

Question 27

What are the actions of the sternohyoid?

Answer 27

Depression of hyoid bone and larynx

Question 28

What is the innervation of the sternohyoid?

Answer 28

Ansa cervicalis

Question 29

What is the origin of the longus capitis?

Answer 29

TPs of C3-C5

Question 30

What is the insertion of the longus capitis?

Answer 30

Occipital bone (anterior foramen magnum)

Question 31

What are the actions of the longus capitis?

Answer 31

Flexion of head and neck

Question 32

What is the innervation of the longus capitis?

Answer 32

Cervical spinal nerves (ventral rami)