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SIGS Unit 8

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    SIGS class review
  •   Study   Slideshow
  • Discuss mechanisms underlying neuronal injury after an ischemic event
    neurons need O2 and glucose (no glycogen storage)
  •  15
  • Discuss the risks and benefits of administering tPA
    Risks: cause a bleed, exacerbate a bleed. Benefits: save the penumbra!
  •  15
  • Differentiate expressive, conductive, and receptive aphagia
    Expressive: Broca's motor non-fluent. Conductive: aka global. Arcuate fasiculus connects. Receptive: Wernike, understanding "word salad"
  •  15
  • Explain how peginterferon beta-1 therapy is utlized in MS
    Interferon beta1 is a polypeptide that binds to immune cells to ↓ antigen presentation and t-cell proliferation. PEG extends the half-life of the drug.
  •  15
  • Describe Lhermitte's phenomenon
    It's an uncomfortable electrical sensation running through the back and limbs that is elicited by flexing the head. The pain can ascend or descend. (MS)
  •  15
  • Draw out the basal ganglia pathway including major structures, neurotransmitters, and overall function (sorry guys!)
    motor cortex, striatum (CN+P), GPi, substantia niagra, thalamus, GPe, subthalamic nucleus
  •  25
  • Overall, parkinson Dz is a ____ of dopamine and huntington is a _____ of dopamine
    Parkinson = dopamine deficiency. Huntington = dopamine excess
  •  5
  • Modifiable risk factors in alzheimer Dz
    Diabetes, obesity, dyslipidemia, HTN, artherosclerosis, cerebrovascular Dz
  •  15
  • What is the suspected pathophysiology of Meniere Dz?
    impaired absorption or overactive production of endolymph (viral, autoimmune, allergy) → LOSS of vestibular and cochlear input →peripheral vertigo
  •  15
  • How can one distinguish between central and peripheral vertigo?
    HINTS exam (head impulse test, nystagmus, test of skew)
  •  15
  • Justify why a low salt diet and/or HCTZ are effective therapies for Meniere Dz
    Osmotically reduce the pressure of the endolymph
  •  15
  • Discuss the kindling theory of seizure control
    Seizures are the path to epilepsy. Little seizures lead to big seizures, big seizures lead to epilepsy - Yoda or something
  •  15
  • What is the inheritence pattern of tuberous sclerosis?
    autosomal dominant
  •  15
  • Outline the aura phase of migraine
    More tired than usual, excessive yawning, scotoma, photophobia, phonophobia, n/v
  •  15
  • Amitriptyline is often used off-label for migraine. What is its class?
    tricyclic antidepressent (blocks NE and 5HT reputake)
  •  5
  • What are the components of a mental status exam?
    1) Appearance/behavior 2) Speech 3) Mood/affect 3) Thoughts/perceptions 4)judgement/insight 5) cognition (attention, memory, orientation)
  •  15