Unit 4 - Head and Neck: Scalp (Ex. III) Flashcards Preview

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Flashcards in Unit 4 - Head and Neck: Scalp (Ex. III) Deck (7)
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1

boundaries

from S nuchal lines of O bone to supraorbital ridge of F bone

2

layers

S ==> skin
C ==> connective tissue containing neurovasculature
A ==> aponeurosis of occipitofrontalis, tempoparietalis, and S auricular muscles
L ==> loose areolar tissue
P ==> periosteum

3

What lie in the loose connective tissue layer?

muscles of facial expression
- originate on bones of face
- insert into overlying skin

4

From what a. are the branches that supply the face and scalp?

EXTERNAL carotid a.
- S and I labial aa. --> lips
- L nasal a.
- angular branches of facial a.
- mental branch of I alveolar a. --> chin
- superficial temporal a.
- P auricular a.
- occipital a.
- supratrochlear and supraorbital branches of ophthalmic a. (branch of INTERNAL) ==> anastomose w/ angular a.

5

sensory nn. of face and scalp

supraorbital and supratrochlear nn. (CN V1)
infraorbital n. and zygomaticotemporal and zygomaticofacial n. (V2)
auriculotemporal n., buccal n., and mental n. (branch of I alveolar n.) (V3)
great auricular n. and lesser occipital n. --> A rami of C2 and C3 via C plexus
greater occipital n. and 3rd occipital n. --> P rami of C2 and C3

6

motor nn. of face and scalp

temporal, zygomatic, buccal, and marginal mandibular branches of facial n. (CN VII) ==> facial muscles
T and P auricular branches of facial n. ==> scalp muscles
muscular branches of mandibular division of trigeminal n. (CN V3) ==> muscles of mastication

7

What does it cover?

neurocranium

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