Neurology Flashcards
What type of genetic disorder is Huntington disease?
Autosomal dominant
What is the patho of Huntington disease?
trinucleotide repeats (CAG/glutamine) of the Huntington gene (chromo 4)
What age does Huntington disease usually appear?
30-50yr
What are the 3 classic signs of Huntington disease?
progressive chorea, rigidity, and dementia, frequently associated with seizures.
How is Huntington dx diagnosed?
sx + family hx+ genetic confirmation
What is seen on imaging for Huntington dx?
cerebral & striatal (caudate nucleus & putamen) atrophy
Txt for Huntington dx?
None, fatal in 15-20yr, genetic counseling
1st FDA approved txt for chorea associated with Huntington dx?
Tetrabenazine
MC cause of primary headaches?
tension headaches
Bilateral, pressing, tightening “band like” non-throbbing headache?
tension headache
What is seen on PE for tension headaches?
pericranial muscle tenderness to the head, neck, or shoulders
Tx for tension headache?
NSAIDS
Dx of tension headaches?
clinical
severe, unilateral periorbital or temporal pain headache?
cluster headache
What can trigger a cluster headache?
alcohol, stress, specific foods
When are cluster headaches worse?
at night
Horner’s syndrome?
ptosis, miosis, anhidrosis
What is seen on PE for cluster headaches?
horner’s syndrome, nasal congestion, rhinorrhea, conjunctivitis, lacrimation
1st line txt for cluster headache?
100% oxygen followed by anti-migraine meds
1st line prophylaxis for cluster headaches?
Verapamil
What is the MC type of migraine?
migraine without aura
What type of focal neurologic symptoms is the most common type during a migraine?
visual
When should a CT be used to dx migraine?
- onset of migraine > 50y
- first or worse severe headache
- new daily, persistent headache
1st line txt for migraine?
NSAIDS, Acetaminophen, Aspirin
What can be added to improve meds during migraines?
caffeine
2nd line txt for migraines?
Triptans or Ergotamines
Prophylactic txt for migraines?
anti-hypertensives = BB and CCB
C/I to triptans?
ischemic stroke, heart dx, uncontrolled hypertension, pregnancy
Adv event of triptans?
chest tightness from vasoconstriction
Adv event of ergotamines?
rebound headache
Used for abortive migraine therapy?
IV Metoclopramide
What nerve does bell palsy affect?
VII
What is bell palsy closely related too?
Herpes simplex virus reactivation
What sx are seen in bell palsy?
Ear pain, unilateral facial weakness, taste disturbance, inability to completely close eyelid
Txt for Bell palsy?
Supportive- eye drops
Prednisone
Acyclovir
What txt for bell palsy should be given within the first 72hrs to decrease recovery time?
Prednisone
When used in combination can in severe cases can improve symptoms and timing of recovery of bell palsy?
Acyclovir and glucocorticoids
In bell palsy weakness and paralysis only affects?
The face
What is the MC cause of Gillian barre?
Campylobacter jejuni
What is gullain barre syndrome?
Demyelination polyradiculopathy of the peripheral nervous system
Sx of guillain barre?
Symmetric ascending weakness and sensory changes
What is a life threatening symptom of guillain barre?
Weakness of respiratory muscles
Sx of guillan barre?
Nerve conduction studies
CSF analysis
What is seen on CSF for Guillain barre?
High protein
Normal WBC
Normal glucose
Txt for Guillain Barre?
Plasmapheresis or IVIG
What txt should not be used for Guillan Barre?
Prednisone
What is the prognosis for Guillan Barre?
60% full recovery in 1yr
What is MS?
autoimmune, inflammatory demyelinating disease of the CNS
What axon degeneration does MS affect?
white matter (brain & spinal cord)
What type of MS is the MC?
relapsing-remitting
What is the MC presenting symptoms of MS?
weakness and visual disturbances
What visual disturbances are seen in MS?
diplopia, optic neuritic
What is Uhthoff’s phenomenon?
worsening of symptoms w/ heat
What is Lhermitte’s sign?
neck flexion causes lightning shock type pain radiating from the spine down the leg
The best initial and accurate test for MS?
MRI w/ gadolinium (contrast)
What proof is needed to dx MS?
2 areas of white matter involvement
If MRI is inconclusive what other test can be used to dx MS?
Lumbar puncture
What is seen on lumbar puncture for MS?
increased IgG & oligoclonal bands
1st line txt for MS?
IV glucocorticoids
Prevention of MS?
Beta-interferon or Glatiramer
What vitamin deficiency puts you at risk for MS?
Vitamin D
Patho of Myasthenia gravis?
autoantibodies against acetylcholine postsynaptic receptor at the neuromuscular junction
2 main symptoms of Myasthenia gravis?
ocular weakness
generalized weakness
Weakness is worsened with repeated muscle use and throughout the day with activties?
Myasthenia gravis
What is myasthenia crisis?
respiratory muscle weakness
What is the outpatient dx of myasthenia gravis?
acetylcholine receptor antibodies
What is the most accurate outpatient test for myasthenia gravis?
electrophysiology testing
What is the dx for emergent myasthenia gravis?
Edrophonium (Tensilon) test- brief improvement of sx
Ice pack test
What is the long term txt for myasthenia gravis?
Acetylcholinesterase inhibitors: Pyridostigmine or Neostigmine
What is the txt for myasthenia crisis?
Plasmapheresis or IVIG
Possible curative txt of myasthenia gravis?
thymectomy
What is parkinson disease?
idiopathic loss of dopaminergic neurons in the substantia nigra.
Triad of symptoms seen in Parkinson disease?
resting tremor, bradykinesia, muscle rigidity
What is the 1st symptom of Parkinson dx?
resting tremor
Dx of Parkinson?
autopsy, lewy bodies and loss of pigment cells in the substantia nigra
Most effective txt for Parkinson?
Levodopa- carbidopa
1st line txt for pts < 65yr with Parkinson?
dopamine agonists- Bromocriptine
What is the role of Carbidopa?
reduces the amount of Levodopa needed, keeps it from being being metabolized in the gut, liver and other tissue
What should be used in monotherapy for patients with Parkinson with tremor as a predominant symptom?
anticholinergics- Trihexylphenidly, Benztropine
What virus is associated with encephalitis?
Herpes simplex virus-1
What symptoms are seen in encephalitis?
headache, neck stiffness, photosensitivity, fever, seizures, altered mental status
What symptoms distinguishes encephalitis from aseptic meningitis?
altered mental status
Dx of encephalitis?
CT first, then lumbar puncture
What is seen on lumbar puncture for encephalitis?
increased lymphocytes, normal glucose
What part of the brain is usually affected in encephalitis?
temporal
The most accurate test for herpes encephalitis?
PCR
Txt for HSV encephalitis?
IV acyclovir
DOC of concussion?
CT head without contrast
DOC for prolonged symptoms of a concussion?
MRI
Txt for concussion?
cognitive and physical rest
How long should pts be watched after a concussion?
min of 24hrs
When can a person resume strenuous activities after a concussion?
upon resolution of symptoms and recovery of memory as well as cognitive functions
When can a athletic return to play after a concussion?
We recommend that athletes NOT return to play the same day after concussion, and also that athletes NOT return to play until asymptomatic off medication
What type of genetic disorder is essential tremor?
autosomal dominant
What type of tremor is seen in essential tremor?
postural bilateral action tremor
What part of the body does essential tremor affect?
upper extremities and head
Tremor that is worsened with intentional movement and emotional stress?
essential tremor
What tremor is improved w/ alcohol?
essentital tremor
Dx of essential tremor?
exclusion, family hx
Txt for essential tremor?
only txt if it interferes
Txt for severe or situational essential tremor?
Propranolol
2nd txt for essential tremor?
Primidone
Initial dx of transient ischemic attack?
CT scan
Definitive dx of transient ischemic attack?
conventional angiography
Txt for non-cardiogenic TIA?
Antiplatelet therapy- aspirin, clopidogrel
Txt for internal carotid artery stenosis 50-99%?
carotid endarterectomy
Txt for cardiogenic artery stenosis?
oral anticoagulation
What is a focal partial seizure?
one discrete part of the brain
simple- w consciousness
complex- w/o consciousness
MC childhood seizure?
Absence Petit mal
What is seen on EEG for absence seizures?
bilateral symmetric 3 Hertz spike and wave activity
Txt for absence seizures?
Ethosuximide
Second line txt for absence seizures?
Valproic acid
Txt for generalized grand mal seizures?
Levetiracetam
Txt for status epliepticus?
Benzo (Lorazepam)
Second line tx for status epliepticus?
Phenytoin or Fosphenytoin
Third line txt for status epliepticus?
Phenobarbital
Definitive txt for status epilepticus if no meds work?
general anesthesia
Giant cell arteritis has a similar clinical spectrum too?
polymyalgia rheumatica
Sx of giant cell arteritis?
headache, jaw claudication, visual changes, scalp tenderness
Definitive dx for giant cell arteritis?
temporal biospy
Txt for giant cell arteritis?
high dose corticosteroids
MC complication of giant cell arteritis?
blindness
What is use to monitor txt effectivity in giant cell arteritis?
sedimentation rate
Sx of deliruim?
fluctuating mental status changes and marked deficit in short term memory
Three patho of alzheimer dx?
beta-amyloid plaques
neurofibrillary tangles
acetylcholine deficiency
What is the 1st sx in dementia?
short term memory loss
Dx of dementia?
r/o, MRI
Txt of dementia?
acetylcholinesterase inhibitors-Donepezil, Tacrine, Rivastigmine, Galantamine
Best add on drug for dementia?
Memantine
MC and most aggressive primary malignant CNS tumors in adults?
Glioblastoma multiforme
DOC for brain tumors?
MRI w/ contrast
Txt for brain tumors?
excision, radiation
Most benign brain tumor?
astrocytoma
MC cause of meningitis in adults?
strep pneumoniae
MC cause of meningitis in older children (10-19y)?
neisseria menigitidis
MC cause of meningitis in newborns?
group B strep
MC cause of meningitis in the immunocompromised?
Listeria monocytogenes
What is Brudzinski sign?
neck flexion produces knee or hip flexion
What is Kernig sign?
Inability to extend the knee/leg with hip flexion
Dx of meningitis?
lumbar puncture
What is seen on lumbar puncture in meningitits?
decrease glucose, increase neutrophils, increase protein, increase opening pressure
Txt for bacterial meningitis?
Vancomycin + Ceftriaxone
Txt for listeria meningitis?
Vancomycin + Ceftriaxone + Ampicillin
What should be given w/ abx in bacterial meningitis?
Dexamethasone
Post-exposure prophylaxis for bacterial meningitis?
Ciprofloxacin or Rifampin
What is complex regional pain syndrome?
autonomic dysfunction following bone or soft tissue injuries
Sx of complex regional pain syndrome?
pain, hypalgesia, allodynia, trophic changes,
Txt for complex regional pain syndrome?
NSAIDS, anesthetic blocks
What prophylaxis can be used after fractures to reduce complex regional pain syndrome?
Vitamin C
MC area of berry aneruysm?
Circle of Willis (anterior communicating artery)
Gold standard dx of berry aneurysm?
angiography
Txt for aneurysm?
surgical clipping, endovascular coiling within first 24 hours
Glasgow Coma scale of what is indicative of coma?
<9
What 3 things should be checked in a non responsive patient after ABCs?
Glucose (for low blood glucose levels)
Thiamine (Wernicke)
Narcan (opiates)
MC type of ischemic stroke?
Middle cerebral artery
Location of stroke when symptoms are greater in the leg, foot, and can cause urinary incontinence?
anterior cerebral artery
Location of stroke that causes vomiting, vertigo, visual changes?
Posterior cerebral artery
Location of stroke that causes sx in the face, arm?
middle cerebral artery
Txt for ischemic stroke?
alteplase (thrombolytic)