histo neuro Flashcards
sx of stroke
FAST numbness dyphagia
sx of TIA
amaurosis fugax <24 hours carotid bruit
tx of stroke
thrombolyse if <4 hours aspirin and dipyridamole
tx of tia
aspirain and dipyridamole
IX for stroke
CT FBC, BP, glucose, ESR ECG carotid doppler
ix for TIA
carotid dopplers FBC, U&E, glucose, bp, ECG
RF for stroke or TIA
FH HTN DM OCP PVD ETOH sickle cell/ PCV
non traumatic cerebral haemmorhages
parechymal haemmorhage SAH
causes of parenchymal haemmorhage
HTN
what occurs in parenchymal haemmorhage
charcot-bouchard aneurysms
where do parenchymal hammorhages occur
basal ganglia
SAH causes
ruptured berry aneurysms AVM Ehler danlos/ coarction of aorta
presentation of SAH
thunderclap headache vomiting loss of conciousness
extra dural hammorhage pathology
middle meningeal artery rupture due to trauma and skull fracture
presentation of extradurual haematoma
rapid arterial bleed lucid interval LOC
causes of subdural haematoma
fall often in elderly/ alcoholics b/c brain atrophy is a RF
presentation ofsubdural haematoma
fluctuating conciousness
coup vs contre coup
coup= site of trauma dn contr coup is region opporiste
define contusion (brain)
where brain touches skull +/- fracture
6 types of brain herniation
uncal transtentorial subfalcine tonsillar upwards transcalvarial
what is meningism
kernig’s sign stiff neck photophioiba headache
what to do if suspected meningitis
immediate abs then confirm with LP and cultures
Lp of bacterial meningitis
turbid appearance low glucose <40mg/dL high protein >250g/L neutrophils bacteria in smear 90-1000+ cells/mm^3
LP of viral meningitis
clear appearance lymphocytes present low ornormal protein <100g/L normal glucose >40mg/dL 50-1000 cells/mm^3
LP of TB meningitis
fibrin web lymphocytes present low glucose <40 high protein 50-500mg/dL 10-1000 cells/mm^3
neonatal cause of bacterial meningitis
GBS listeria E.Coli
paediatric causes of bacterial meningitis
haemophilus influenzae streptococcus pneumoniae
adult causes of bacterial meningits
strep pneumoniae neisseria meningitis
causes of bacterial meningitis in elderly
strep pneumoniae gram negative rods e.g. e coli
viral causes of meningitis in neonate
coxsackie echovirus HIV mumps
causes of viral encephalitis
rabies herpes simples 1
sx of viral encephalitis
drowsiness behavioural changes headache fever seizures
neurofibromatosis causes what tumour
meningioma
a ventricular tumour with hydrocephalus is usually a
ependymoma
an indolent childhood tumour is often a
pilcytic astrocytoma
a soft gelatinous calcified tumour is often a
oligodendroma
protein involved in alzheimners
tau beta amyloid
protein involved in DLB
ubiquitin alpha synuclein
protein involved in CBD
tau
protein involved in FTD
tau
protein in picks disease
tau
treatmetno falzheimers disease
glutamate antagonist nAchR agonists anticholinesterases
histology of alzheimers
NFTs of tau beta amyloid plaques
gross findings in alzheimers
wide sulci and narrow gyri widened ventricles
DLB presentations
parkinsonism psychological disturbances hallucinationsfalls
Parkinsons’ disease
death of dopaminergic neurones in SN
sx of parkinsons
Tremor Rigitidy Akinesia Postural instability pscyh features e.g. hallucinations
protein in oparkinsons
alpha synuclein
MS pathology
loss of myelin and plaques
types of MS
RRMS primary progressive
protein markder in MS
myelin basic protein proteolipid protein
Multiple system atrophy three subtypes
shy drager syndrome olivopontocerebellar striatonigral
shy drager syndrome features
autonomic dysfunction