Extras: Study Sheets Flashcards
other names for cingulate and uncal herniations
cingulate = subfalcine uncal = transtentorial
major sign of transtentorial herniation
CN3 compression -> dilated pupil, eye down and out, ptosis
Kernohan’s notch phenomenon (from transtentorial herniation)
ipsilateral hemiparesis or hemiplegia
what perinatal brain injury causes chalky yellow plaques in the brain?
periventricular leukomalacia
aggregates found in diffuse axonal injury (DAI) vs CTE
DAI: a-synuclein
CTE: Tau
two things associated with holoprosencephay
Trisomy 13, decreased SHH signaling
CT of pt with agenesis of corpus callosum
bat wing lateral ventricles
presentation of dandy walker dz
hydrocephaly & progressive skull enlargement, slow motor development
sx of Syringomyelia
UE loss of pain + temp
most important cellular indicator of CNS injury
gliosis (hypertrophy & hyperplasia of astrocytes)
ACA vs MCA stroke sx
- ACA: weakness, leg hemiplegia, alien hand syndrome
2. MCA: hemineglect, face & arm hemiplegia, hemianopia, aphasia
MCA stroke causes gaze preference…
towards lesion
sx of vascular dementia
- pseudobulbar signs (inappropriate emotions)
- dementia
- gait abnormalities
vascular dementia brain change
multiple bilateral grey and white matter infarcts
CAA: cerebral amyloid angiopathy
amyloid deposited around vessels -> lobar hemorrhage/microbleeds (a type of hypertensive cerebrovascular disease)
MC cause of SAH
saccular aneurysm rupture
meningitis in neonate vs unvaxxed baby
- neonate: E.coli, group B strep
2. unvaxed bb: HIB
four things that cause chronic meningitis
- TB
- lyme disease
- neurosyphilis
- cryptococcus neoformans
sx of neurosyphilis
communicating hydrocephalus, delusions, dementia, tabes dorsalis (impaired joint sense, joint pain, lightening pain, decreaed DTRs)
what condition causes “soap bubble” brain
cryptococcus neoformans
brain changes in HSV-1 encephalitis
necrotizing and hemorrhagic temporal lobes
inclusions in HSV1 encephalitis
cowdry body intranuclear inclusions
CMV in fetuses vs immunocompromised adults
fetus: micrcephaly
adults: subacute encephalitis
inclusions in rabies
Negri bodies
sx of SSPE
kids: cognitive decline, limb spasticity, SZRs
if you see free tachyzoites and encysted brachyzoites on CT what u lookin at
toxoplasmosis gondii
what kind of infection does acanthamoeba cause?
chronic granulomatous meningoencephalitis
orbital inflammatory pseudotumor
fat and tendons replaced by fibrosis
histo of sebaceous carcinoma
pagetoid spread, stains with oil red O stain
what does conjunctival scarring cause?
dry eye (due to decreased goblet cells)
cause of pinguecula and pterygium
actinic sun damage
anterior vs posterior segment uveitis causes
- anterior: juvenile RA
2. posterior: pneumocystis, sarcoid, auto-immune
mutations in uveal melanoma
GNAQ, GNA11
hallmark of FUch’s dystrophy
anvil-shaped bumps on descemet’s membrane
what condition causes “oil droplet keratopathy”
actinic band keratopathy
four conditions associated with developing keratoconus
Down syndrome, Marfans, atopic dz, juv glaucoma
primary vs secondary closed angle glaucoma
primary: pupil block / iris bombe -> increases fluid
secondary: membrane forms over iris (from VEGF from another source)
what does retinal detachment entail
separation of neurosensory retina + RPE
three signs of malignant HTN on fundoscope
- macular star (firework)
- elsching spots (choroid infarcts)
- cotton wool spots
wet vs dry AMD
wet: choroid neovascularization
dry: atrophic (no neovasc)
tx for wet AMD
VEGF antagonist injections
chromosome for RB
chr 13Q14
two signs of RB on histo
flexner-wintersteiner rosettes, fleurettes of rods and cones