1 Flashcards
Location of Lumbar Puncture
L3-L4 or L4-L5
Very low glucose in CSF
Tuberculosis
Positive EBV PCR in CSF
CNS Lymphoma in immunocompromised
T1
Anatomic; fluid is black
T2
Reverse anatomic: fluid is white
T2 FLAIR
Reverse anatomic; fluid is black
____ waves (___ Hz): posterior head regions during relaxed awake state with eyes closed
Alpha; 8-13
____ waves (___ Hz): o frontal regions during relaxed awake state with eyes closed
Beta; 14-30
____ waves (___ Hz): during drowsiness and sleep
Theta/Delta; less than 7
Absence seizures may be stimulated with _____.
Hyperventilation
Myotonic seizures may be stimulated with _____.
Photic stimulation
Central or Peripheral Nystagmus? Unidirectional
Peripheral
Central or Peripheral Nystagmus? May be purely vertical or purely horizontal
Central
Central or Peripheral Nystagmus? may be bidirectional
Central
Central or Peripheral Nystagmus? fixation inhibits nystagmus
Peripheral
Central or Peripheral Nystagmus? Tinnitus or hearing loss
Peripheral
Central or Peripheral Nystagmus? Chronic
Central
Which type of nystagmus? normal response to moving object
optokinetic
Which type of nystagmus? horizontal jerks changing direction every 2-3 minutes
Periodic alternating
Which type of nystagmus? seen in familial periodic ataxia
Downbeat
Which type of nystagmus? seen in Wernicke encephalopathy
Upbeat
Which type of nystagmus? greater amplitude than endpoint; seen in drug intoxication
Gaze evoked
Which type of nystagmus? Horizontal and rotary components
Vestibular
6 Causes of Vertigo
Labyrinthine concussion, infarction, perilymph fistula, vestibular neuronitis, Meniere Disease, BPPV
Medical treatment of orthostatic hypotension
Midodrine, fludrocortisone
Medical treatment of neurogenic syncope
Beta blockers
Which diagnosis? Ataxia in children following viral infection, complete recovery
Post-Infectious Cerebellitis
Which diagnosis? Ataxia with UE>LE and loss of reflexes, impairment of vibration/proprioception; HOCM, DM, arrhythmia
Friedreich Ataxia
Most common headache
Tension-type
Tx of tension-type HA
simple analgesics
Abortive Tx of cluster HA
triptans
Prophylactic Tx of cluster HA
Verapamil or lithium
Tx of paroxysmal hemicrania
indomethacin
The duration and frequency of Paroxysmal hemicrania compared to tension-type headache are ____ and ____, respectively
decreased; increased
Most common nerve palsy in IIH
CN6
Claudication of the Jaw and AION: think _____
Giant Cell Arteritis
Tx of trigeminal neuralgia
carbamazepine (and other anticonvulsants
Tx of postherpetic neuralgia
gabapentin, TCAs
Neurofibrillary tangles are located _____ and consist of ____
intracellularly; tau
Senile plaques are located ____ and consist of ____.
extracellularly; amyloid
Second most common cause of dementia
Lew Body Disease
Lewy bodies consist of _____.
alpha-synuclein
Which dementia? Hallucinations and sensitivity to anti-epileptics, parkinsonism
Lewy Body Disease
Which dementia? Gait ataxia/falls early in disease, extra-pyramidal rigidity
PSP
Medical tx of Huntington chorea
dopamine antagonists/neuroleptics
Which dementia? Prominent behavior/personality changes and disinhibition
Frontotemporal Dementia
Which dementia? myoclonus and periodic sharp waves on EEG
Prion/CJD
Benzodiazepines suppress ___ stage of sleep
N3
Antidepressants and alcohol suppress ___ stage of sleep
REM
What nutrient is commonly deficient in RLS
Iron
Tx of narcolepsy
Modafinil, stimulants
Tx of cataplexy
TCAs
Cause of subarachnoid hemorrhage
Circle of Willis Aneurysm
Medical tx of SAH
Nimodipine
Cause of intraparenchymal hemorrhage
HTN
Which epilepsy syndrome? 1-2 Hz spike and wave, associated with intellectual disability
Lennox-Gastaut
Which epilepsy syndrome? Simple partial (especially mouth/face), centrotemporal spikes
Benign Rolandic
Which epilepsy syndrome? 4-6 Hz polyspike and wave, often in early morning
Juvenile Myoclonic
Which anti-epileptic? gingival hyperplasia, coarsening of facial features
Phenytoin
Which anti-epileptic? hyponatremia, a granulocytosis
Carbamazepine
Which anti-epileptic? tremor, weight gain, hair loss, hepatotoxicity
Valproic acid
Which anti-epileptic? affects T-type Ca channels
Ethosuximide
Which anti-epileptic? most notorious for SJS
Lamotrigine
Which diagnosis? Muscle rigidity, fever, autonomic instability, altered level of consciousness
Neuroleptic Malignant Syndrome
Tx of akathisia
anticholinergics, Beta Blockers
Tx of Neuroleptic Malignant Syndrome
Antipyretics, hydration (consider dantrolene or bromocriptine)
Tx of tardive dyskinesia
Reserpine or tetrabenazine
Tx of Stiff Person Syndrome
Benzos, baclofen
Tx of ET
Propranolol, primidone
Tx of chorea
Haloperidol
Cause of hemiballismus
Basal ganglia stroke
Tx of dystonia
Botulinum
Which diagnosis? Tics and/or OCD triggers by antibody response targeted against basal ganglia
PANDAS
Which diagnosis? ipsilateral CN3 palsy, impaired consciousness, ipsilateral hemiplegia, progressive temporal/occipital dysfunction
Uncal herniation
Ways to decrease ICP
Elevate head of bed, mannitol, hyperventilation, ventricular drain, barbiturates
Which diagnosis? Pulmonary involvement, non-caveating granulomas, increased serum ACE
sarcoidosis
Tx of sarcoidosis
Steroids
Which diagnosis? dementia, seizures, myoclonus, ataxia, supranuclear ophthalmoplegia, oculomasticatory myorhythmia
Whipple Disease
Which diagnosis? Ophthalmoplegia, ataxia, and confusion; may have signs of nutritional deficiency, hypothermia, or postural hypotension
Wernicke Encephalopathy
Which diagnosis? Isolated memory disturbance, confabulation
Korsakoff Psychosis
Complications and tx of antiphospholipid syndrome
Stroke; anticoagulation
Most common CNS tumor
Metastasis
Which genetic syndrome? Associated with ependymoma
NF1
Which genetic syndrome? Associated with medulloblastoma
Li-Fraumeni
Which genetic syndrome? Associated with hemangioblastoma
VHL
Most common primary brain tumor in adults
Glioblastoma Multiforme
Imaging pattern for GBM
Butterfly pattern
Which PBT? Slow growing, calcifications, fried egg cells
Oligodendroglioma
Most common location for ependymoma in adults and children
spinal cord; 4th ventricle
Pathologic feature of ependymoma
Pseudorosettes
Tx of Schwannoma
Stereotactic radiosurgery
Which tumor? cerebellar cystic lesions
Hemangioblastoma
Which tumor? Calcified suprasellar cyst on imaging
Craniopharyngioma
Most common metastases
Lung > Melanoma
Metastases most likely to bleed
Melanoma, Chorio, Renal clear cell
Which diagnosis? Painful loss of visual acuity, pain with EOM use, papilledema
Optic Neuritis
Worsening of symptoms with heat
Uhthoff Phenomenon/MS
Tx of MS flare
IV Methylprednisolone followed by oral prednisone taper
Which diagnosis? Monophasic demyelinating illness in the CNS preceded by viral infection
Acute Disseminated Encephalomyelitis (ADEM)
Tx of ADEM
corticosteroids may help; recovery usually full
Which diagnosis? optic neuritis and transverse myelitis
Neuromyelitis optica
NMO involves antibodies to ____
aquaporin 4
Tx of NMO
Steroids
Which diagnosis? Dementia, focal cortical dysfunction, cerebellar dysfunction; seen in context of AIDS
Progressive Multifocal Leukoencephalopathy
Cause of PML
JC virus (infects oligodendroglial cells to cause demyelination)
Which diagnosis? acute confusional state and cortical vision loss in context of rapidly progressive HTN or use of immunosuppressants
Posterior Reversible Encephalopathy Syndrome (PRES)
Which diagnosis? HA, neck stiffness, myalgias, meningismus, CN palsies
Lyme Disease
Most CN palsy in Lyme Disease
7
Which diagnosis? HA, fever, altered consciousness, partial seizures, memory disturbance, olfactory hallucinations
HSV encephalitis
Most common fungal intracranial infection
Cryptococcal Meningitis
Which diagnosis? India Ink staining and tx with amphotericin
Cryptococcal Meningitis
Most common parasitic intracranial infection
Toxoplasmosis
Which diagnosis? Multiple cystic lesions with surrounding edema, endemic in central and south America
Neurocysticercosis
Cause of neurocysticercosis
Taenia solium
Tx of neurocysticerosis
Albendazole, steroids/anticonvulsants
Which diagnosis? Resembles subacute combined degeneration, but no B12 deficiency
Vacuolar Myelopathy (HIV-Associated)
Which diagnosis? Antiganglioside antibodies
GBS
Tx of GBS
Plasmapheresis, IVIG
Which diagnosis? Sensorimotor axonal neuropathy, abdominal pain
Porphyria
Most common inherited peripheral neuropathy
CMT
Palpable nerve hypertrophy
CMT, Leprosy
Inheritance pattern of DMD/BMD
X-Linked
Inheritance of Periodic Paralysis
AD
CGG trinucleotide repeat causing mental retardation
Fragile X