Anterior Neck

Question 1

Platysma superior?

Answer 1

inf. border of mandible + subcutaneous tissue of lower face

Question 2

Platysma inferior?

Answer 2

fascia covering pectoralis major and deltoid

Question 3

Platysma innervation?

Answer 3

Facial n (CN7)

Question 4

Platysma action?

Answer 4

Draws corners of mouth inferiorly and widens it; draws skin of neck superiorly when teeth are clenched

Question 5

Sternocleidomastoid superior?

Answer 5

mastoid process

Question 6

Sternocleidomastoid inferior?

Answer 6

anterior manubrium and superior medial clavicle

Question 7

Sternocleidomastoid innervation?

Answer 7

spinal accessory n (CN11)

Question 8

Sternocleidomastoid action?

Answer 8

a. unilateral – flex and rotate head to same side
b. bilateral – flex neck anteriorly
c. with head fixed&raquo_space; elevate sternum for ventilation

Question 9

Scalenes superior?

Answer 9

cervical vertebrae (CII-CVII)

Question 10

Scalenes inferior?

Answer 10

first and second ribs

Question 11

Scalenes innervation?

Answer 11

anterior rami of C3-C8

Question 12

Scalenes action?

Answer 12

elevate rib 1 and 2

Question 13

Digastric origin?

Answer 13

Anterior belly arises from digastric fossa of mandible

posterior belly arises from mastoid process

Question 14

Digastric distal?

Answer 14

both bellies are connected by an intermediate tendon, which attached to hyoid e via fibrous sling

Question 15

Digastric innervation?

Answer 15

anterior belly trigeminal n (V3); posterior belly digastric branch of facial n (CN7)

Question 16

Digastric action?

Answer 16

depresses mandible and -elevates hyoid

Question 17

Mylohyoid origin?

Answer 17

mylohyoid line (of mandible

Question 18

Mylohyoid distal?

Answer 18

hyoid

Question 19

Mylohyoid innervation?

Answer 19

Mandibular branch of trigeminal n (CNV3)

Question 20

Mylohyoid action?

Answer 20

raises oral cavity floor, elevates hyoid, elevates tongue, depresses mandible

Question 21

Geniohyoid origin?

Answer 21

mandible

Question 22

Geniohyoid distal?

Answer 22

Hyoid

Question 23

Geniohyoid innervation?

Answer 23

C1 (travels with hypoglossal n (CN12)

Question 24

Geniohyoid action?

Answer 24

moves hyoid and tongue upward during swallowing

Question 25

Stylohyoid origin?

Answer 25

styloid process

Question 26

Stylohyoid distal?

Answer 26

hyoid

Question 27

Stylohyoid innervation?

Answer 27

facial n (CN VII)

Question 28

Stylohyoid action?

Answer 28

elevate hyoid during swallowing

Question 29

Omohyoid origin?

Answer 29

superior border of the scapula near suprascapular notch

Question 30

Omohyoid distal?

Answer 30

inferior border of the hyoid

Question 31

Omohyoid innervation?

Answer 31

both via anterior rami (of C1-C3 via ansa cervicalis)

Question 32

Omohyoid action?

Answer 32

depresses, retracts, steadies hyoid

Question 33

sternohyoid origin?

Answer 33

manubrium of sternum

Question 34

sternohyoid distal?

Answer 34

hyoid

Question 35

sternohyoid innervation?

Answer 35

anterior rami 1-C3 via branch of ansa cervicalis

Question 36

sternohyoid action?

Answer 36

depresses hyoid after elevation during swallowing

Question 37

sternothyroid origin?

Answer 37

posterior surface of the manubrium of the sternum

Question 38

sternothyroid distal?

Answer 38

oblique line of thyroid cartilage

Question 39

sternothyroid innervation?

Answer 39

C2 and C3 by a branch of ansa cervicalis

Question 40

sternothyroid action?

Answer 40

depresses hyoid and larynx

Question 41

thyrohyoid origin?

Answer 41

Thyroid cartilage

Question 42

thyrohyoid distal?

Answer 42

hyoid

Question 43

thyrohyoid innervation?

Answer 43

C1 via hypoglossal n (CN12)

Question 44

thyrohyoid action?

Answer 44

elevates thyroid and depresses hyoid