BAB 5a Flashcards
What is the mnemonic “HINTS”?
If… a. Head Impulse = Impulse Normal, or b. Nystagmus = Fast and Alternating, or c. Torsion Skew = Refixation Cover Text, then… be afraid of STROKE.
Why can a positive head impulse test be re-assuring (this is the Farid test)?
Bc a negative test does not rule out a stroke. A + test means there is a peripheral problem on a specific side.
Where do the SCCs send their message regarding balance?
Medial Vestibular Nucleus in the medulla.
What is the common finding in MS?
aquired pendular nystagmus
What is the sign if the lesion is in the ASCC or PSCC?
nystagmus with tort. You slow drift to the side of the lesion, but the jerk is away from the lesion. A left beating jerk nystagmus has the lesion on the R.
What are the result of the RIGHT caloric test for the following: a. whole brainstem b. none c. cortex
a. none b. R drift, L nystagmus c. R drift, no nystagmus
An unnoticed MI. What are the lesions
Ischemia in the watershed areas (areas farthest away from blood supply). On histology you would see necrosis, macs, shrunken neurons, etc.
Hyalinosis in vessel walls. Makes for weaker vessels, increased chance for stroke.
Hyalinosis in vessel walls. Makes for weaker vessels, increased chance for stroke.
Hyalinosis in vessel walls. Makes for weaker vessels, increased chance for stroke.
66yo F has TIA, then months later falls dead.
Thickening in the cortex is more from amyloid. Thickening in deeper brain tissue is more hyaline.
Thickening in the cortex is more from amyloid. Thickening in deeper brain tissue is more hyaline.
What stain do you use for amyloid.
Congo red. Amyloid shows up as green.
They also use immuno-fluorescence, and it turns brown.
