Posterior Triangle of Neck Flashcards Preview

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Flashcards in Posterior Triangle of Neck Deck (26):
1

Skin of Back of Scalp innervated by....

Dorsal Rami of spinal nerves C2-C5

2

Skin of Anterior and Lateral Scalp innervated by....

Ventral Rami of C2-C4

3

Lesser Occipital Nerve

from C2, C3
Supplies skin over lateral part of occipital region and upper part of medial surface of auricle

4

Great Auricular Nerve

from C2, C3
supplies skin over angle of mandible and parotid gland and both surfaces of lower part of auricle

5

Transverse Cervical Nerve

from C2, C3
Supplies skin of anterior and lateral aspects of neck

6

Supraclavicular Nerves

from C3, C4
Supply skin at base of neck and skin covering upper parts of pectoralis major and deltoid muscles

7

Platysma

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)

8

Posterior Auricular Vein

Drains scalp posterior and superior to auricle
drains into external jugular v

9

Retromandibular V

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

10

Anterior Branch of Retromandibular V

drains into facial vein

11

Posterior Branch of Retromandibular V

joins posterior auricular v to make the external jugular v

12

External Jugular V

drains into subclavian vein

13

Tributaries of External Jugular Vein

Transverse Cervical, Suprascapular, and Anterior Jugular Veins

14

Sternocleidomastoid

Attaches at sternum and clavicle and at mastoid process
supplied by ventral rami C2 and C3

15

Unilateral Contraction of Sternocleidomastoid

flex head and neck to side of contraction
rotation of head and neck to opposite side of contraction

16

Bilateral Contraction of Sternocleidomastoid

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

17

Parts of Deep Cervical Fascia

Investing, Pretracheal, Prevertebral Layers, Carotid Sheath

18

Investing Layer

encircles neck, splits to enclose sternocleidomastoid and trapezius

19

Pretracheal Layer

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

20

Buccopharyngeal Fascia

Behind pharynx and esophagus

21

Prevertebral Layer

in posterior part of neck
surrounds cervical vertebrae and anterior and posterior vertebral muscles

22

Carotid Sheath

Fascial tube from base of skull to root of neck
contains common and internal carotid arteries, int jugular v, vagus n

23

Retropharyngeal Space

b/t buccopharyngeal fascia and prevertebral fascia
loose CT allows for mvmt of pharynx and esophagus

24

Nerve Supply of Scalene Muscles

branches from ventral rami of cervical spinal nerves

25

Actions of Scalene Muscles

lateral flexion of neck
aid in inspiration- elevate 1st and 2nd ribs in forced

26

Omohyoid

depresses hyoid bone
supplied by Ansa Cervicalis