Neck II

Question 1

anterior triangle boundaries

Answer 1

1) posterior
- anterior border of SCM
2) anterior
- median line of neck
3) superior
- lower border of mandible

Question 2

cervical cavity

Answer 2

1) posterior
- cervical vertebrae
2) posteriolaterally
- scaleni ms.
3) lateral
- SCM
4) anterior
- infrahyoidn

Question 3

nerves and vessels in the anterior triangle

Answer 3

1) common carotid
2) internal jugular vein
3) vagus n
4) external jugular vein
5) vagus nerve
6) external carotid a. and some branches
7) internal carotid artery
8) vertebral artery
9) thyrocervical trunk

Question 4

bony and cartilaginous landmarks

Answer 4

1) hyoid bone
2) thyroid cartilage
- laryngeal prominence
3) thyrohyoid membrane
- cricoid cartilage
4) cricothyroid membrane
5) trachea

Question 5

major vessels of subclavian

Answer 5

1) vertebral artery
2) thyrocervical trunk
- inferior thyroid a.
- suprascapular a.
- transverse cervical a.
3) internal thoracic artery
4) costocervical trunk
- supreme intercostal
- deep cervical

Question 6

lymphatic drainage

Answer 6

1) 3/4 drain from thoracic duct
- into subclavian vein
2) 1/4 drain from lymphatic duct

*into junction of internal jugular and subclavian vein

Question 7

muscular triangle boundaries

Answer 7

1) superior
- hyoid bone
2) lateral
- superior belly or omohyoid
3) inferior
- sternum and medial 1/3 of clavicle

Question 8

muscular triangle muscles

Answer 8

1) infrahyoid muscle
- omohyoid m
- sternohyoid m
- thyrohyoid m
- sternothyroid m

Question 9

carotid triangle nerve

Answer 9

1) accessory nerve (CN XI)
2) hypoglossal nerve (CN XII)
3) nerve to the thyrohyoid m (C1)
4) ansa cervicalis
5) vagus nerve (CN X)

Question 10

ansa cervicalis

Answer 10

1) superior root (C1)
- descends hypoglossi
2) inferior root (C2-3)
- descends cervicalis

*embedded in superior aspect of carotid sheath
- purely MOTOR for strap muscles (sternohyoid, sternothyroid, and omohyoid)

Question 11

cervical plexus

Answer 11

1) GSE
- ansa cervicalis
- phrenic nerve
2) GSA
- cutaneous nerves

Question 12

vagus nerve

Answer 12

1) superior laryngeal n.
- external laryngeal (cricothyroid muscle)
- internal laryngeal (through thyrohyoid membrane)
2) inferior laryngeal
- recurrent laryngeal

Question 13

common carotid artery

Answer 13

1) internal
- NO BRANCHES
- moves to base of brain and joins vertebral artery
2) external
- many branches

Question 14

external carotid artery

Answer 14

1) superior thyroid
- superior laryngeal
2) ascending pharyngeal artery
3) lingual artery
4) occipital artery
5) facial artery

Question 15

anterior triangle veins

Answer 15

1) internal jugular vein
- through jugular foramen
2) many things drain into it

Question 16

anatomical relationships

Answer 16

1) superior thyroid artery
- runs with external laryngeal nerve of vagus
- into the cricothyroid m. and the thyroid gland
2) superior laryngeal artery
- runs with internal laryngeal nerve
- enters thyrohyoid ligament

Question 17

submandibular triangle

Answer 17

1) anterior
- anterior belly of the digastric (innervated by CN V)
2) posterior
- posterior belly of the digastric (innervated by CN VII)
3) superior
- inferior border of the mandible 4) posterior

Question 18

submandibular contents

Answer 18

1) submandibular gland
2) facial artery and vein
3) stylohyoid m. (CN VII)
4) hypoglossal n.
5) mylohyoid m. and n. ( CN V)

Question 19

submental triangle

Answer 19

1) inferior
- body of hyoid
2) lateral
- right and left anterior bellies of the digastric
3) floor
- mylohyoid m.

Question 20

submental triangle contents

Answer 20

1) lower central and lateral
- infection will go to submental lymph node
2) tip of tongue and lower lip
- also goes to submental lymph node