W20-L1: Face, Scalp and Parotid Flashcards Preview

Matt's Block 06 - Neuro block > W20-L1: Face, Scalp and Parotid > Flashcards

Flashcards in W20-L1: Face, Scalp and Parotid Deck (33):
1

What are the margins of the scalp?

Extends anteriorly to the supra-orbital margins, posteriorly to the external occipital protuberance, and laterally to the zygomatic arches

2

What are the layers of the scalp?

Skin
Connective tissue
Aponeurotic layer
Loose connective tissue
Peri-cranium

3

Which layer of the scalp allows for movement of scalp over the skull?

The loose connective tissue layer

4

Describe the occipitalitis frontalis muscle

Has two bellies and an aponeurosis between

5

Why do scalp wounds bleed more?

1. Scalp wounds gape as each muscle belly of frontalis occipitalis contracts
2. There are rich anastomoses between internal and external carotid
3. Arteries are attached to fibrous septae and this prevents clotting

6

In which layer of the scalp is the neurovascular structures?

Connective tissue

7

What are the layers of the face?

4 similar layers to scalp, but no loose connective tissue and aponeurosis is replaced by facial muscles

8

Origin and insertions of facial muscles

Origins is the bones over which they lie, and insert into the skin of the face

9

To what structure are facial muscles related to and what do they act as?

Related to an orifice, and can act as sphincters or dilators

10

From which pharyngeal arch are they derived?

2nd

11

Which cranial nerve supplies the muscles of the face?

CN VII

12

Dermatomes of head and neck

Anterior of scalp (to ears) gets V1, posterior is dorsal rami of C2 , then maxillary area is V2, mandibular is V3 and posterior neck is C3

13

What are the two internal carotid derived branches suppling the face?

Supra-orbital and supra-trochlear (more medial)

14

What supplies the face from the external carotid artery?

Facial artery, which winds around the inferior angle of the mandible then a tortuous course to the medial angle of the eye, gives off branches as it goes

15

What supplies the lateral aspect of the scalp?

Superficial temporal artery

16

Suppling the posterior scalp are which arteries?

Occipital artery and posterior auricular artery, both branches of the external carotid

17

What is the difference between the facial artery and vein

Vein is straighter and more superficial

18

Why is Thrombophlebitis of the facial vein possible and why is it important?

Emissary veins of the face can drain into the cavernous sinus, can cause meningitis and encephalitis

19

Where are lymph nodes in the head?

Ring of lymph nodes that surround the base of the skull, submental, sub-mandibular, pre-auricular, parotid, mastoid and occipital nodes

20

Where do lymph nodes in the head drain to?

Deep cervical nodes

21

What is the parotid gland?

serous salivary gland wrapped in fascia

22

Anatomical landmarks of the parotid gland

It is below the zygomatic arch, in front of the mastoid process, above angle of mandible

23

If you removed the parotid gland would you see?

styloid process

24

Where does the parotid Duct run?

parotid duct from anterior border of parotid onto massater, turns inwards pierces buccinater

25

within parotid
gland from superficial to deep it is...

CN VII
Retromandibular vein External carotid artery

26

Scattered throughout the parotid glands are

Lymph nodes

27

Where does the Facial nerve exit the skull?

Exits the posterior cranial fossa by internal acoustic meatus and exit by the styloid mastoid foramen

28

Course of the Facial nerve outside the skull

Gives off posterior auricular nerve which goes to occipitalis, enters posteromedial surface of parotid gland and then forms a plexiform arrangement within

29

What are the 5 terminal branches of the plexiform arrangment of CN VII

Temporal
Zygomatic
Buccal
Mandibular
Cervical
"To zanzibar by motor car"

30

What does the facial nerve supply?

Muscles of facial expression

31

Where is the retromandibular vein and what is it formed by?

In the parotid gland and formed by the superficial temporal veins and maxillary veins

32

What are the two terminal branches of the external carotid artery?

Enters the parotid gland and then gives off maxillary artery and superficial temporal artery

33

What is Facial nerve paralysis called?

Bell's Palsy

Decks in Matt's Block 06 - Neuro block Class (48):