PreTest Flashcards
trihexyphenidyl (and benztropine)
anticholinergic drug for PD –decrease Sx PD. Interfere with DA neurotransmission by creating relative deficiency of ACh neurotransmission
haloperidol, pimozide, trifluoperazine, fluphenaine
Tourette syndrome - suppress tics
L-Dopa / Carbidopa –mech of action
L-Dopa – crosses BBB, dopa decarboxylase converts it to DA
Carbidopa –does not cross BBB, inhibits dopa decarboxylase and stops conversion
meige syndrome – & some drugs that bring it on & Tx
focal dystonia: blepharospam, jaw opening, lip retraction, neck contractions, tongue thrusting
- -phenothiazine, butyrophenone
- -Tx-botulinum
ET vs PD
ET does not have general slowing, mainly effects head and arms (unlike PD). ET occurs during action and stops when limb is relaxed
vegetative state
autonomic activity is sustained without cog fcn
locked-in syndrome
consciousness is preserved
Tardive Dyskinesia
involuntary movements of tongue, face, arms, etc.
use “tricks” to alleviate
PD tremor vs cerebellum tremor
PD = resting
Cerebellum tremor = intention
T1 vs T2 vs FLARE vs DWI
T1: bright = white matter
T2: bright = old infarct, CSF
DWI: bright = acute infarct
T1/FLARE: dark = CSF
OD phenytoin SFx
nystagmus (“lateral beating movements of the eyes”)
Rinne vs Weber
Weber: BC is equal always
Sensorineural loss - softer side
Rinne: BC > AC = louder side Sensorineural loss - softer side
Sensorineural loss = injury to R cells in cochlea or to the cochlear division of auditory nerve
Conductive loss = injury in the system of membranes and ossicles designed to focus the sound of the cochlea
CN V Damage
CN VII Damage - ear
CN VIII Damage
CN V = loose TM but no change
CN VII = stapedius muscle -hyperacusis (inc sensitivity to sound)
CN VIII = hearing loss
Stroke workup process
immediate: labs, CT non-con, ECG
secondary: brain, heart (TTE)
Vertigo locations
vestibular system, cerebellum
BPPV vs
Vestibular neuritis vs
Labyntheritis vs
Meniere Syndrome
BPPV - vertigo + nystagmus
Vestibular neuritis - vertigo wo hearing loss
Labyntheritis - vertigo + hearing loss
Meniere Dz - episodes of vertigo, tinnitus, hearing loss
epilepsy vs
deja vu
epilepsy - cerebral cortex
deja vu - temporal love
Primary generalized seizure etiologies
hereditary, toxic-metabolic insult
EEG Patterns
Absence vs
JME vs
MG
Absence = 3Hz generalized spike + wave
**Not Complex Partial S – no aura, no postictal
JME = 4-6 Hz irreg polyspike + wave
MG = 3-5 Hz with decremented response
JME Px
myoclonic jerks am
GTC or absence in a.m.
Fhx (auto-dom)
tx - lifelong AEDs/lamotrigene
MRI Gadolinium +
differentiate between neoplastic vs inflammatory
Causes of C6 Radiculopathy (5)
herniated disk osteophyte tumor hematomas abscess chronic meningitis
C6 Radiculopathy - no need to investigate
1 - Hx consistent with herniated disc
2 - Recent onset (go conservative mgmt.)
3 - sensory only (can have decrease reflexes)
\\
yes: motor sx/signs, chronicity, serious?
EMG vs NCS
EMG - muscles –> “denervation” shown by fibrillations/+sharp waves
NCS - myelin dmg / conduction slowed
Numbness in Hands and Feet - localization (4)
1 - Brain
2 - Brainstem fcn (CN deficits? vision loss?)
3 - Spinal Cord (bladder, bowel, sexual function)
4 - Nerves to muscle
Sensation - parasthesias and pain –where?
nerve roots (ventral/anterior >>> dorsal/posterior) \+ peripheral nerves
Reflex - how does it word? UMN/LMN
Spinal Reflex Arc – tendon->SC->contraction
LMN = SRA disruption (hypo)
UMN = central (hyper)
Coordination
cerebellar fcn
Axonal neuropathy vs
Demyelinating neuropathy
AN - toxic metabolic, vascular dmg
DN - acquired: GBS
GBS CSF findings
Inc pr nrm/inc WBC **macrophage mediated demyelination (why pr inc) -diffuse areflexia*** can get CN findings peak 2-4 weeks, recovery wks-months Cx: respiratory failure, dysautonomia
What decreases consciousness? (2)
1 -bi-cerebral hemispheres
2 - BS-RAS
Tonic Phase
urinary bladder incontinence, abdominal & respiratory muscle contraction, jaw clenching
Clonic Phase
rhythmic - violent shaking
Seizure / Generalized SE labs
- serum chemistries + inf (hypomagnesium?)
- PT/PTT and platelets
- Drug toxicity & alcohol withdrawal
- AED levels (too low?)
GSE Rx path
Ativan -> Ativan -> fosphenytoin -> phenobarbital (Must intubate 1st! bc respiratory depression levels)
Fosphenytoin - use and SFx
seizure prophylaxis
SFx - hypotension, cardiac arrhythmias
visuospatial impairment vs
difficulty with calculations vs
motor apraxia
visuospatial impairment - ex: can’t read clock face parietal lobes
difficulty with calculations - dom parietal lobes
motor apraxia - ex: dressing self - dom parietal lobe
Lobe localization: frontal temporal parietal occipitotemporal & occipitoparietal junction
frontal - paranoia, personality change, poor insight
temporal - memory
parietal - calculations, visuospatial, apraxia
occipitotemporal & occipitoparietal junction - complex visual hallucinations
neurofibrillary tangles vs
senile (neuritic, amyloid) plaques
neurofibrillary tangles - hyperphosphorylated tau within neurons
senile (neuritic, amyloid) plaques - extracellular deposition of B-amyloid synaptic cleft = impairs transmission
AD brain area progression
1 - hippocampus (medial temporal), postierior parieto-temporal cortex (word finding, calculations, spatial)
2 - Lateral temporal, frontal, and occipital levels (**social behavior preserved. poor judgement, delirium, agitation) -> akinetic mutism = cessation speaking
AD mgmt. - Rx (2)
1 - Acetylcholinesterase inhibitors: donepezil, rivastigmine, galantamine–help attention, memory, learning
2 - NMDA antagonist: memantine –> blocks NMDA R (increase cognitive performance) … glutamate is neurotoxic
meningitis 18-50
strep. pneumo
N. meningitides
H. flu
meningitis: newborn
GBS, E. Coli, listeria
meningitis: 3mo-18 yo
N. meningitides, S. pneumo, H. flu
meningitis 50+
strep. pneumo
listeria
gram neg bacilli
Nrm CSF
Open P: 6-20mmHg WBC: 0-5 RBC: 0 Pr: 18-58 Glucose: 2/3 serum glucose
Tx meningitis / N. meningitides
1 - Dexamethasone
2 - Cefotaxime or Ceftriaxone
+Vancomycin
3 - if pt 50+ add ampicillin
Aphasias
- “trans trend”
- Broca = nonfluent
- anomia
- “trans trend” = repetition intact
- “nonfluent” = broca issue
- anomia = word finding deficit, rare isolation **does not mean mixed transcortical.
Basilar migraine
- vision disturbance -> can go blind
- can have psychosis
- *terrible headache
- can have: syncope, transient quadriplegia
Transient trigeminal neuralgia - causes
MS, basilar artery aneurysms, acoustic schwannomas, posterior fossa compression
trigeminal neuralgia vs atypical facial pain
TN - paroxysmal, lancinating pains, unilateral
AFP - constant and deep pain can be unilateral or bilateral
Migraine Rx: abortive vs prophylaxis
Abortive: triptans, ergotamine, metoclopramide (nausea)
Prophylaxis: propranolol, verapamil, amitriptyline, valproate
Cluster headaches vs vertebrobasilar headahces
cluster headaches - men can be irritable, look for seasonality
verebrobasilar headaches - look for initial vision issues, then headache, then can have: psychosis, hemiplegia, etc.
intracranial HTN causes:
pseudo tumor cerebri, SLE, renal dz, hypoparathyroidism, radical neck dissection, vit A intoxication, steroid withdrawal
Nerve involved in sarcoidosis
facial nerve
Brain enhancing lesions in AIDs patients (2)
- CNS lymphoma –> get LP, check CSF for EBV
- Toxoplasmosis
Most common cause of acute encephalitis
herpes encephalitis - temporal, CSF with increased number of lymphoctyes
common meningitis
neonate: GBS, E. Coli, listeria
6mo-6 yrs: strep pneumo, N meningitis, HiB, enterococcus
6yrs-60yrs: strep pneumo, N meningitis, enterococcus, HSV
60+yrs: S. pneumo, G-, listeria
PML Etio
- HIV/AIDs
- Oligodendrocytes with abnormally large nuclei with dark staining inclusions
Most common adult brain tumor and type
- GBM (astrocytoma)
- from glial cells
Most common met to brain is from…
lungs
Most common location for met in brain…
grey/white junction, where bloodborn cells will stop and grow (especially the cerebellum and cerebral hemispheres)
Hypothalamic hamartomas vs
Malignant tumors
(cause and tx)
Hypothalamic hamartomas - increases function and overproduction of GHrH –> precocious puberty. Tx by Sxx!
Malignant tumors – Tx = CHEMO!!
Paraneoplastic cerebellar degeneration - Sx, CA that causes (3 in order)
Sx - progressive ataxia, dysarthria, nystagmus
CA - small cell carcinoma of lung > ovarian carcinoma > lymphoma
Hypercalcemia - neurologic Sx
fatigability, lethargy, generalized weakness, areflexia
RLS - Tx and worseners
Tx - clonazepam, gabapentin, L-dopa, DA agonists (pramipexole, ropinirole), opiates
Worseners - neuroleptics, calcium channel blockers, caffeine
Nicotinic Acid Deficiency
Pellagra - skin, CNS, digestive tract, hematopoietic system
Vitamin E Deficiency
-Neuro Dz rare but is in childhood -spinocerebellar degeneration
Pickwickiann Syndrome
Obesity + hypersomnia
Females with Fragile X gene have 50% chance?
mental retardation
divalproex sodium = ?
Depakote / valproate / valproic acid
Correcting sodium too fast up or down = ?
Correcting serum Na+ too fast: “From low to high, your pons will die” (osmotic demyelination syndrome)
“From high to low, your brain will blow” (cerebral edema/herniation)
Wilson disease (hepatolenticular degeneration)
- Copper accumulates, especially in liver, brain, cornea, kidneys, joints.
- Presents before age 40 with liver disease (eg, hepatitis, acute liver failure, cirrhosis), neurologic disease (eg, dysarthria, dystonia, tremor, parkinsonism), psychiatric disease, Kayser-Fleischer rings (deposits in Descemet membrane of cornea) A, hemolytic anemia, renal disease (eg, Fanconi syndrome).
- Treatment: chelation with penicillamine or trientine, oral zinc.
Tuburous Sclerosis - Infantile spasms/seizures Tx
ACTH
Down Snydrome - brain deformity
smaller than normal for age and body size
Fetal alcohol impacts what CNS part of fetus?
impaired neuronal migration
Type 1 and 2 chiari malformations - when becomes Sx? What Sx?
T1 and 2 -mostly adult as ataxia
T2 - might be kids as hydrocephalus with retardation
Pt with small cell carcinoma can get what kind of myopathy?
Dermatomyositis – as a part of a paraneoplastic syndrome
Myotonic dystrophy - later Sx
- balding
- testicular atrophy
- agitation
- heart defects
- cataract development
- EMG with “dive bomber pattern”
Myositis with CK - nrm? abn?
Nrm CK = PMR
Inc CK = dermatomyositis, polymyositis
Papillitis vs ICP and Papiledema
Papillitis= vision loss (and pain with moving globe as well as light pressure)
*no vision loss with ICP and Papiledema
Eye findings:
cHTN
AV nicking - segmental narrowing of the arteries (not drusen)
Face injury - CN most likely injured
CN 4 - bc it goes most anterior to the orbit (also shares a nerve sheath with CN V1)
Drug that causes NYSTAGMUS
Alcohol and Barbiturates
Fredreich Ataxia - spinal involvement
- lesion not in cerebellum, it is the spinocerebellar tracts
- peripheral neuropathy from DRG invovlement
B12 def vs Thiamine def
B12 - Subacute Combined Degeneration -> dorsal columns, lateral corticospinal tracts, spinocerebellar tracts
Thiamine - CAN: Confusion, Ataxia, Nystagmus
ADEM (Acute Disseminated Encephalomyelitis) vs MS
-Look the same on MRI
ADEM = monophasic
vs
MS = polyphasic
DM - ocular nerve palsy
CN 3 palsy
Multiple foci of punctate hemorrhage = ?
Diffuse axonal injury
LT improvement of pt with severe traumatic head injury
hypothermia! **NOT PROPHYLATIC HYPERVENTILATION