Unit 3: The neck and face Flashcards Preview

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Flashcards in Unit 3: The neck and face Deck (36):
1

Submental subdivision of anterior triangle

body of hyoid, anterior belly or digastric, mandibular symphysis, includes suprahyoid muscles, lymph nodes and mylohyoid, origin of anterior jugular

2

Submandibular subdivision of anterior triangle

inferior mandible, anterior and posterior digastric, conains submandibular gland, portion of hypoglossal nerve, facial artery and vein, and suprahyoid muscles

3

Carotid subdivision of anterior triangle

Superior belly of omohyoid, anterior SCM, posterior belly of digastric, contains common carotid, internal jugular, vagus, carotid body and sinus

4

Muscular subdivision of anterior triangle

midline of neck, superior belly of omohyoid, anterior SCM, contains infrahyoid muscles, parathyroid glands

5

Mylohyoid

N: mylohyoid A elevates hyoid, floor of mouth and tongue during swallowing and speaking

6

Stylohyoid

N: stylohyoid branch of facial nerve A elevate and retract hyoid

7

Geniohyoid

N: C1 of hypoglossal A: pulls hyoid anerosuperioly, shorten floor of mouth, widens pharynx

8

Digastric

N: (anterior) mylohyoid, (posterior) digastric branch of facial A: elevate and steady hyoid, depresses mandible against resistance

9

Innervation of the face

CN V trigeminal: sensory, motor for muscles of mastication; CN VII facial: motor

10

First branch of trigeminal

Opthalmic V1: purely sensory; supra-orbital, supratrochlear, infratrochlear: innervates scalp, forehead and lacrimal glands*

11

Second branch of trigeminal

Maxillary V2; infraorbital (teeth, eyelid, top lip), zygomaticotemporal (temple), zygomaticofacial (skin on cheek)

12

Third branch of trigeminal

Mandibular V3; sensory and motor: mental (skin of lip and chin), buccal (cheek, gums), auriculotemporal (ear)

13

Bell's Palsy

loss of innervation of facial muscles; loss of facial tone and expression

14

Occipitofrontalis

Front belly (elevates eyebrows and wrinkles skin of forehead), occipital belly (retracts scalp, synergist to front), obicularis oculi (closes eyelid; palpebral and orbital parts)

15

Levator labii superioris

part of dilator of mouth, elevate upper lip, show sadness

16

Buccinator

presses cheek against molars, keeps food in cheek, resists detension

17

Zygomaticus major

dilator of mouth; elevate labial commissure (smile and sneer)

18

Levator anguli oris

part of dilator, widens oral fissure (gin/grimace)

19

Risorius

dilator, depresses labial (sadness)

20

depressor anguli oris

dilator, depresses labial (sadness)

21

depressor labii inferioris

dilator, retracts or everts lower lip (sadness)

22

Mentalis

elevates and protrudes lower lip, elevates skin of chin (doubt)

23

Facial nerve

CN VII: posterior auricular-occupitalis, temporal, zygomatic, buccal, marginal mandibular, cervical

24

Posterior auricular supplies

occupitalis

25

temporal supplies

O. oculi and inferior muscle

26

Buccal supplies

buccinator and O oris

27

marginal mandibular supplies

risorius and chin muscles

28

cervical supplies

platysma

29

Cutaneous scalp nerves

greater occipital and lesser occipital (C2)

30

Blood supply

mostly external carotid: facial, superficial temporal, and occipital; some internal carotid

31

Facial

Along inferior mandible deep to platysma, crosses inferior border anterior to masseter, mandible, buccinator, maxilla to canthus, superior and inferior labial branch

32

Superficial temporal

formed at TMJ joint between TMJ and auricle, produced the transverse facial almost immediately, supplies parotid gland and masseter, divides into frontal and parietal branch in scalp

33

Occipital

courses inferiorly under auricle through posterior triangle, emerges at back of head to supply scalp and occipitalis

34

Internal carotid

supplies superficial face via supratrochlear and supra orbital arteries

35

SCALP

Skin, connective tissue, aponeurosis, loose CT, periosteium; arteries within CT, held tightly, will bleed profusely, infection transmitted easily

36

Veins of head and neck

most with arteries, abundant anastomoses, drain to external or internal jugular via facial vein