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Flashcards in lesions Deck (62)
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1

damaged oculomotor nerve (midbrain)

-IPSILATERAL oculomotor palsy
-diplopia
-dilated pupil

2

damaged cerebellothalamic fibers (midbrain)

-CONTRALATERAL ataxia,
-tremor
-red nucleus hyperkinesias

3

damaged corticonuclear fibers (midbrain)

-CONTRALATERAL facial weakness lower face
-tongue deviation to contralateral side on protrusion
-IPSIlateral trapezius and sternoCM weakness

4

damaged occulomotor fibers (midbrain)

-IPSILATERALoculomotor paralysis
-diplopia,
-dilated pupil

5

damaged cortico spinal fibers (midbrain

contralateral hemiplegia

6

lesion to subthalamic nucleus deficits?

HEMIBALLISUMUS(corticospinal)
= rapid and unpredictable flailing of contralateral extremities; movements are usually more obvious in UE

7

occlusion of lenticulostriate branches to internal capsule: deficits

- CONTRALATERAL hemiplegia (corticospnal)
- loss or decreased pain, temp, proprio (thalamocortical fibers thru posterior capsule)
- maybe: partial CONTRALATERAL paralysis of facial muscles/tongue (genu/corticonuclear fibers)

8

occlusion of distal brances of MCA: deficits

- CONTRALATERAL motor and sensory loss of UE, trunk, face (precentral, postcentral gyri)
- deviation of eyes to ipsilateral side (frontal eye fields)

9

occlusion of distal branches of ACA:deficits

- motor and sensory losses in contralateral foot, leg, thigh (ant. post. paracentral gyrus)

10

antrior watershed infarct: where? deficits?

- ACA/MCA junction
- contralateral hemiparesis (usually leg)
- expressive language
- behavioral changes

11

posterior watershed infarct: where? deficits?

- MCA/PCA junction
- visual deficits
- language problems

12

anterior choroidal artery syndrome: deficits?

- HOMOnymous hemianopsia (optic tract)
- LOWER portions of basal nuclei
- hemiplegia, hemianesthesia (LOWER aspects of internal capsule)

13

clinical presentation of parkinsons

- stooped posture
- resting tremor
- rigidity
- shuffling or festinating gait
- trouble maintaining mvmt (a-, hypo-, or bradykinesia)
- dimentia (later)

14

medial midbrain lesion damages what STRX, what blood vessel

- corticspinal fibers in crus cerebri
- occulomotor nerve
- maybe corticobulbar fibers
- maybe substantia nigra, but usually no noticeable deficits
- paramedian branches of PCA

15

deficits of lesion to corticospinal fibers in crus cerebri?
blood vessel to area?

- CONTRALATERALhemiplegia of UE, trunk, LE (from occlusion of paramedian branches of PCA)

16

deficits of lesion to occulomotor nerve ?
blood to area?

- IPSILATERAL paralysis of eye movement: eye is "DOWN AND OUT"
- pupil dilated, fixed
- paramedian branches of PCA

17

deficits of lesion to corticobulbar fibers in crus cerebri?

- in tongue deviating to OPPOSITE side of lesion upon protrusion
- paralysis of lower half of facial muscles on CONTRALATERAL side

18

central midbrain lesion damages what structures

- oculomotor nerve
- red nucleus and CBELLOthalamic fibers
- maybe ML
- maybe ventral trigeminothalamic fibers

19

deficits of lesion to red nucleus and CBELLOthalamic fibers/

- CONTRALATERALataxia
- tremor of CBELLAR origin

20

pineocytoma can impinge?

- superior colliculi
- cerebral aquaduct
- trochlear/occulomotor nerve
- MLF

21

deficits of pineocytoma?

- paralysis of upward gaze (superior colliculi)
- hydrocephalus (cerebral aquaduct)
- failure of eye mvmt (trochlear/occulomotor nerve)
- nystagmus (MLF)

22

initial signs of uncal herneation

- dilation of pupils (uni or bipolar)
- slow reaction to light
- followed by weakness of occulomotor movement

23

progressive symptoms of uncal herniation

- fully dilated pupils
- eyes deviate laterally b/c of unapposed abducens nerves
- weakness on CONTRALATERAL side (crtocospinal fibers in crus)

24

symptoms of an especially large or bilateral supratentorial lesion

decorticate rigidity
= flexion and adduction of UE; extention of LE with internal rotation and plantar flexion

25

symptoms of an intratentorial lesion

decerebrate rigidity
= UE and LE extended, toes point inward, pronated forearm, head and neck extended

26

opisthotonos symptoms

EXTENDED head and neck

27

midline optic chiasm lesion

- BITEMPORAL hemianopia
- may have relative afferent pupillary defect (RAPD)

28

lateral optic chiasm lesion

- BINASAL hemianopia
- may have RAPD

29

optic tract lesion

- HOMOnymous hemianopia on ipsilateral side
- may have RAPD

30

total optic radiation lesion

- ipsilateral HOMOnymous hemianopia (also in lesion or total primary visual cortex)