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BDS3 Anatomy > Anterior Triangle : Carotid Sheath and Neurovascular Structures > Flashcards

Anterior Triangle : Carotid Sheath and Neurovascular Structures Flashcards

1
Q

contents of carotid sheath

A

IJV
CCA –> ICA + part of ECA
Vagus CNX

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2
Q

start and end location of carotid sheath

A

carotid canal in base of skull to aortic arch

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3
Q

where does the CCA and subclavian artery branch directly from aortic arch

A

left side
(comes from brachiocephalic trunk on R side)

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4
Q

what does the ICA supply

A

brain = no branches in neck

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5
Q

where are the carotid body and sinus located

A

at the bifurcation of the CCA at level of C3/4 / superior border of thyroid cartilage and larynx
body is in wall of ICA
sinus is on the bifurcation

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6
Q

what innervates the carotid sinus and body

A

CNIX - carotid sinus nerve
CNX

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7
Q

what does the carotid body house

A

chemoreceptors which communicate w medulla

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8
Q

what role does the carotid body house

A

monitors O2, CO2, pH and temp and acts in emergency by increasing these

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9
Q

what does the carotid sinus house

A

baroreceptors/ pressoreceptors which communicate w medulla

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10
Q

what role does the carotid sinus play

A

monitors BP and keeps in homeostatic values
baro = stretch eg if BV dilate

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11
Q

8 branches of the external carotid artery

A

SALFOPMS

superior thyroid
ascending pharyngeal
lingual
facial
occipital
post auricular
maxillary -> middle meningeal
superficial temporal

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12
Q

where does the CCA branch into ICA and ECA

A

level of 3/4 / superior border of the thyroid cartilage

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13
Q

which branches run anteriorly from the ECA

A

superior thyroid
lingual
facial

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14
Q

which branches run posteriorly from the ECA

A

occipital
posterior auricular

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15
Q

which branch runs medial to the ECA

A

ascending pharyngeal

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16
Q

what is the relevance of the foramen spinosum to the ECA

A

the maxillary branch of the ECA passes through here where it becomes the middle meningeal artery

17
Q

what are the 7 branches of the IJV

A

SMLFPOI
superior thyroid
middle thyroid
lingual
facial
pharyngeals
occipital
inferior petrosal sinus

18
Q

what is the IJV a continuation of

A

sigmoid sinus

19
Q

how many bulbs does the IJV have

A

2 superior and inferior
before and after the branches
bulbs contain valves

20
Q

how does the sigmoid sinus exit the skull

A

jugular foramen

21
Q

what are the 2 branches of the brachiocephalic vein

A

subclavian vein
IJV
on both R and L sides

22
Q

origin of the IJV

A

brain
skull
face
parts of neck

23
Q

which muscle runs across the IJV

A

omohyoid

24
Q

origin of the EJV

A

angle of mandible
has post and ant divisions form here
drains into the subclavian

25
Q

5 branches of the EJV

A

ASTRP

anterior JV
suprascapular
transverse cervical
post external division-retromandibular vein
posterior auricular

26
Q

course of anterior JV

A

branches off the EJV at the level of the hyoid bone and joins with the AJV from opposite side via the jugular venous arch

27
Q

what is the only tributary of the subclavian vein

A

EJV

28
Q

what CN pass through the jugular foramen

A

CN XI X IX
9 10 11

29
Q

course of CNXII (hypoglossal)

A

exits skull through the hypoglossal canal and goes the oral cavity - no branches in neck

30
Q

course of CNXI (spinal accessory)

A

exits skull through jugular foramen and ascends to supply the SCM and trapezius

31
Q

course of CNX

A

exits skull through jug foramen
branches into : PCSRL
pharyngeal
carotid body branch
superior laryngeal
right recurrent laryngeal - at level of subclavian vein
left recurrent laryngeal- at level of arch of aorta

32
Q

course of CNIX (glossopharyngeal)

A

exits skull through jugular foramen
branches into : OSPC
oral cavity
stylopharyngeus muscle branch
pharyngeal branch
carotid sinus branch

33
Q

course and supply of transverse cervical

A

anterior rami C2+3 make the transverse cervical which gives cutaneous supply to the SCM and anterior triangle of neck

34
Q

course and supply of ansa cervicalis

A

formed of C1-3 has a superior and inferior root and goes to supply infrahyoids

35
Q

cervical plexus

A

ant rami of C1-4 form the plexus which supplies : infrahyoids, diaphragm, skin of ant and lateral neck, inferior head

36
Q

origin of brachial plexus

A

C5-T1

37
Q

origin of phrenic nerve

A

ant rami C3+4

BDS3 Anatomy (11 decks)

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