Posterior Triangle of Neck

Question 1

Skin of Back of Scalp innervated by….

Answer 1

Dorsal Rami of spinal nerves C2-C5

Question 2

Skin of Anterior and Lateral Scalp innervated by….

Answer 2

Ventral Rami of C2-C4

Question 3

Lesser Occipital Nerve

Answer 3

from C2, C3

Supplies skin over lateral part of occipital region and upper part of medial surface of auricle

Question 4

Great Auricular Nerve

Answer 4

from C2, C3

supplies skin over angle of mandible and parotid gland and both surfaces of lower part of auricle

Question 5

Transverse Cervical Nerve

Answer 5

from C2, C3

Supplies skin of anterior and lateral aspects of neck

Question 6

Supraclavicular Nerves

Answer 6

from C3, C4

Supply skin at base of neck and skin covering upper parts of pectoralis major and deltoid muscles

Question 7

Platysma

Answer 7

embedded in superficial fascia
Tenses neck, depresses mandible, draws down lower lip and angle of mouth
inn by cervical branch of facial n (CN VII)

Question 8

Posterior Auricular Vein

Answer 8

Drains scalp posterior and superior to auricle

drains into external jugular v

Question 9

Retromandibular V

Answer 9

formed w/in parotid gland by superficial temporal and maxillary v
divides into anterior and posterior branches

Question 10

Anterior Branch of Retromandibular V

Answer 10

drains into facial vein

Question 11

Posterior Branch of Retromandibular V

Answer 11

joins posterior auricular v to make the external jugular v

Question 12

External Jugular V

Answer 12

drains into subclavian vein

Question 13

Tributaries of External Jugular Vein

Answer 13

Transverse Cervical, Suprascapular, and Anterior Jugular Veins

Question 14

Sternocleidomastoid

Answer 14

Attaches at sternum and clavicle and at mastoid process

supplied by ventral rami C2 and C3

Question 15

Unilateral Contraction of Sternocleidomastoid

Answer 15

flex head and neck to side of contraction

rotation of head and neck to opposite side of contraction

Question 16

Bilateral Contraction of Sternocleidomastoid

Answer 16

Draw head forward
flex head and neck against resistance
accessory m of inspiration

Question 17

Parts of Deep Cervical Fascia

Answer 17

Investing, Pretracheal, Prevertebral Layers, Carotid Sheath

Question 18

Investing Layer

Answer 18

encircles neck, splits to enclose sternocleidomastoid and trapezius

Question 19

Pretracheal Layer

Answer 19

Encloses infrahyoid muscles, thyroid gland, trachea, esophagus, larynx, pharynx

Question 20

Buccopharyngeal Fascia

Answer 20

Behind pharynx and esophagus

Question 21

Prevertebral Layer

Answer 21

in posterior part of neck

surrounds cervical vertebrae and anterior and posterior vertebral muscles

Question 22

Carotid Sheath

Answer 22

Fascial tube from base of skull to root of neck

contains common and internal carotid arteries, int jugular v, vagus n

Question 23

Retropharyngeal Space

Answer 23

b/t buccopharyngeal fascia and prevertebral fascia

loose CT allows for mvmt of pharynx and esophagus

Question 24

Nerve Supply of Scalene Muscles

Answer 24

branches from ventral rami of cervical spinal nerves

Question 25

Actions of Scalene Muscles

Answer 25

lateral flexion of neck

aid in inspiration- elevate 1st and 2nd ribs in forced

Question 26

Omohyoid

Answer 26

depresses hyoid bone

supplied by Ansa Cervicalis