ICAST Flashcards
Layers of scalp
- S = skin
- C = cutaneous
- A = aponeurosis
- L = loose areolar tissue
- P = periosteum
In which layer of the scalp does shearing occur
Loose areolar tissue
Which nerve supplies posterior scalp
c2
Which nerve supplies lower dentition
5c
Which nerve passes through infraorbital fossa
Infraorbotal nerve (branch of 5b)
Where can infection in pterygopalatine fossa pass to and why
Anywhere in head/neck - acts as a crossroads
Which nucleus is associated with primary afferents of taste
nucleus solitaires
On which nerve are taste fibres carried in tongue?
lingual from 5c
on which nerve are taste fibres carried into skull base
chorda tympani
Bleeding skin cancer
SCC
How to tell if SCC has invaded bone
Is it mobile
Pain temp coarse touch in
spinothalamic
pain detected in
frontal cortex, limbic system and thalamus
brown squared syndrome
hemisection of spinal cord
UMN lesion
ipsilateral UM signs due to lateral corticospinal tract damage
course of pudendal nerve as it enters perineum
leaves sacrum, goes through greater sciatic foramen, allcocks canal and re-enters through lesser sciatic foramen
bony landmark for episiotomy
ischial spine
How does infection spread from ear to sigmoid sinus
emissary veins or direct contact via bone
which sinus empties into sigmoid sinus
transverse sinus
bone surrounding ossicles and cochlea
bony labyrinth
fluid inside bony labyrinth
perilymph
membranous labyrinth
system of membranes within bony labyrinth is membranous labyrinth - contains endolymph
pars…
pars flaccida = top part, floppy
pars tensa = bottom part, rigid
cholesteatoma forms when negative pressure sucks pars flaccida into upper ear = dead skin and smell
hillocks 1-3 from pharyngeal arch
1
hillocks 4-6 from pharyngeal arch
2
front of ear supplied by
auriculotemporal nerve - trigeminal
posterior ear supplied by
c2 - greater auricular
which pharyngeal arch forms cleft lip
1
what do semi-circular canals detect
angular movement
what do utricle and saccule detect
acceleration and elevation respectively
how many turns does cochlear have
2.5
how many openings from semi-circular canals into vestibule
5
cognitive decline
dementia
artery occlusion leading to right leg weakness
left anterior cerebral artery
condition when foramen of Monroe occluded
hydrocephalus
are UMN sx immediate
no takes a while to occur
what is sensory level?
level below which sensation is lost
uncal herniation
third nerve compressed and spills over tenotium cerebella
structures passing through jugular foramen
jugular vein
Cn 9,10,11
sigmoid sinus
why is it bad when tonsils coning
compression of respiratory centres = die
why is it bad to do LP on coning pt
makes pressure difference greater so tonsils sucked further down
motor supply to pharyngeal constrictors
vagus
nerves damaged in waiters tip
c5.6
pair of muscles behind kidneys
psoas
nerves passing through psoas
lumbar plexus
subarachnoid aneurysm
berry aneurysm
thunderclap headache
drooping eyelid and pupillary constriction
horner’s
c8/t1 palsy
Horner’s and klumpke’s palsy
names of neurones
multipolar, bipolar and unipolar
inflammation of nervous system in brain
MS
sx MS
fatigue pain weakness visual changes
which CN involved in tears
7
what is topic nerve surrounded by
meninges - dura
Where does optic nerve leave retina
optic disc
What is papilloedema a sign of
high ICP
So function
lateral and down
IO
lateral and dup
LR
abduction
which cn does snellen check
2
cavernous sinus thrombosis
headache around eye, swelling and bulging eye after infected piercing
CN in cavernous sinus thrombosis
6
retinal artery occlusion
pale disc and cherry red spot