T1 - PowerPoint PPT Presentation

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T1

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if both strength and pain/temperature are impaired in a single limb, the lesion ... 6. diplopia is always due to a lesion in the brain stem or periphery (nerve/NMJ ... – PowerPoint PPT presentation

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Title: T1


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SLIDE 1
T1

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SLIDE 2

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SLIDE 3
PONS

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SLIDE 6


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A
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C
B
D
E
F
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D
C
E
A
B
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right ear light reflex (Lr) is always anterior
ventral quadrant Hmhead of malleus (dont sweat
the other abbrevs/labels!)
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B
A
E
C
D
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G
A
B
C
D
E
F
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SLIDE 25
A
E
D
B
C
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SLIDE 26
A
B
C
D
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B
A
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C
B
A
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  • SPEED PLAYS
  • if both strength and pain/temperature are
    impaired in a single limb, the lesion is either
    in the periphery or the cortex. The ALS carries
    crossed info in the spinal cord while the LCST
    controls ipsi muscles via LMNs. The ALS and CST
    are physically separated as they go up the brain
    stem, so usually are not damaged together.
    However, they are pretty close in cortex (pre-
    versus postcentral gyrus) and could be damaged at
    the same time.
  • if there is reduced pain/temperature in one limb
    and reduced vibration sense in a contralateral
    limb, the level of the lesion is somewhere in the
    spinal cord (on the side of the
    vibration/position loss)
  • increased reflexes in a symptomatic limb (after
    spinal shock) suggests a central (CNS/spinal
    cord) lesion reduced reflexes in a symptomatic
    limb suggest a peripheral lesion
  • facial weakness ipsilateral to body weakness
    implies a lesion rostral to motor VII (rostral
    pon and above)
  • both a third nerve palsy and a Horners can
    result in ptosis and pupillary asymmetrybut with
    a third nerve palsy the ptosis is on the side of
    the large pupil with a Horners the ptosis is on
    the side of the small pupil
  • 6. diplopia is always due to a lesion in the
    brain stem or periphery (nerve/NMJ/muscle) but
    not in the cortex (frontal eye fileds). A gaze
    palsy (impaired movement of both eyes in one
    direction, but both eyes move congruently and
    remain aligned in all postions of gaze) is due to
    a lesion in cortex or brain stem, but not in the
    periphery

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SLIDE 32

I guess this is it!! Sorry to see it end!!
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