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oral cavity - BDS 1 > dissection > Flashcards

dissection Flashcards

1
Q

what runs vertically across sternocleidomastoid

A

external jugular vein

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2
Q

what does the external jugular vein drain and where to

A

face and scalp

to subclviaun

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3
Q

why does a valsalvas manoeuvre make the external jugular vein stand out

A

increases thracic pressure

venous return to heart is decreased

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4
Q

what is likely to be on medical treatement if you can see the external jugular vein

A

congestive heart failure

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5
Q

what happens to the EJV if patient reclines

A

more visible due to impaired venous return

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6
Q

4 pairs of infra hyoid muscles

A

sternohyoid
omohyoid
thryohyoid
sternothyroid

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7
Q

what do the infra hyoid muscle do

A

depress the hyoid bone

hold the hyoid bone so the suprahyids can depress he mandible

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8
Q

what is the nerve supply for the infrahyoids

A

ansa cervicalis (cervical plexus)

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9
Q

where do arteries enter the thyroid gland

A

superior - poles of each lobe

inferior - posterior border

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10
Q

where do the artieres for the thyroid gland arise from

A

superior
- external carotid
inferior
- subclavian

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11
Q

what do the thyroid arteries also supply

A 
superior thyroid arteries branches into
-hyoid
- sternocleidomastoid 
-superior laryngeal 
arteries
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12
Q

what is left on removal or benign lesions affecting the gland

A

posterior regions so blood can still enter

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13
Q

function of trapexisu

A

elevate retract and depress scapula

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14
Q

function of sternocleidomastoid

A

flexion of neck

movement of face side to side/tilitng

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15
Q

accessory nerve
type, where to
in and out of skull

A

CN XI
motor to SCM and trapezius
from C1-C4 in foramen magnum and out via jugular foramen

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16
Q

what spinal nerves contribute to cervical plexus

A

c1-c4

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17
Q

what do the other cervical spinal nerves contribute to

A

contribute to brachial plexus

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18
Q

testing for accessory nerve function

A

shrug shoulders

turn head against resistance

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19
Q

what supplies the larynx

A

recurrent laryngeal nerve

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20
Q

divisions of trigeminla nerve

A

ophthalmic
maxillary
mandibular

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21
Q

where do the branches of trigemnial exit on the face

A

v1- supraorbital foramen
v2- intraorbital formaren
v3- mental foramen

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22
Q

what is the modilous

A

knot of non contracitile fibrous tissue (where orbicularis orgs and buccinators meet)

23
Q

where can facial arteries be felt

A

lower border of mandible, anterior to masseter

24
Q

why is the facial artery tortuous

A

elasticity lost in older arteries

25
Q

difference between veins in head ad neck vs elsewhere

A

lack valves

- therefore infection can spread from superficial to deep veins

26
Q

how do the deep and superficial drainages of the face connect

A

retromandibular vein comminate between the internal and external jugular vein

27
Q

where can you palpate the parotid duct

A

clench teeth

duct superficial to masster, below zygomatic arch

28
Q

where does the parotid duct open into the mouth

A

opposite upper secodnmolar

29
Q

what does the parotid duct pass through to reach the mouth

A

buccinator

30
Q

why is inflammation of the parotid painful

A

surrounded by fascia/capsule

31
Q

divisions of the facial nerve and what they supply

A 
temporal- frontalis
zygomatic - obicularis oculi
buccal - buncinator and lip elevators
mandibular - lip depressors
cervical - platysma
32
Q

most common form of facial palsy

A

bells palsy

33
Q

effect of damage to peripheral motor nerve (short term(

A

flaccid paralysis

34
Q

test for integrity of facial nerve

A

exaggerated facial expression

taste on anterior 2/3 tomgue

35
Q

effect of interruption of facial nerve in parotid gland

A

loss of all 5 branches therefore paralysis to all muscles of facial expression

36
Q

where does the facial nerve enter and leave the skill

A

enters viat IAM

exit via stylomastoid foramen

37
Q

what if the facial nerve was damaged in the internal auditory meatus

A

loss of lacrimation

reduction in saliva production in sublingual and submandibular

38
Q

test for trigemnila nerves

A

sharp blunt test

protrusion of jaw - deviation to injured side

39
Q

what does the hypoglossal nerve supply

A

muscles of the tongue

expect for palatoglossus

40
Q

testing for hypoglossal

A

protrude tongue, dont deviate to opposite side

41
Q

function of digastric

A

elevate hyoid

depress mandible

42
Q

function of mylohyoid

A

elevate hyoid bone

elevate floor oral cavity

43
Q

what happens if both infra an d supra hyoids act together

A

hyoid bone stablised

mandible depressed

44
Q

where is the submandibular gland

A

inferior to the ramus

posterior to the mylohyoid

45
Q

where do submandular secretions enter OC

A

via whartons duct to sublingual papillae

46
Q

what type of gland is the submandibular gland

A

mixed

seromucus

47
Q

how to distinguish between submandibular swelling of nodes or glands

A

nodes swell along a chain

smaller and more superfocial

48
Q

where do the internal carotid arteries pass of the skull

A

carotid canal

49
Q

where do the internal jugular vein pass the skill

A

jugular formamen

50
Q

where will the heaviest plaque deposits occur

A

along gingival margins

lingual side of teeth

51
Q

what are the supra hyoid muscles

A

digastric
mylohyoid
geniohyoid
stylohyoid

52
Q

what do the supra hyoid muscles do

A

elevate the hyoid bone

53
Q

attachments of the supra hyoid muscles

A

stylohyoid - styloid process to hyoid
digastric - 2 bellies anterior hyoid to digastric fossa of mandible, posterior hyoid to mastoid process
mylohyoid - mylohyoid line of mandible
geniohyoid - inferior mental spine of mandible

54
Q

actions of the supra hyoid muscles

A

stylohyoid - pulls hyoid poster and superiorally
digastric -elvate the hyoid, depress the mandible
mylohyoid - elevates hyoid
geniohyoid -depress mandible and elevates hyoid

oral cavity - BDS 1 (66 decks)

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