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Flashcards in lesion III Deck (19):
1

Describe basal ganglia

- INHIBITON AND FACILIATION

--> inhibiting involutnary movement at rest

--> releasing or disinhibiting voluntary movements

--> accelerating voluntary movements

--> stopping volitional movements upon completion

Start.... keep going.... stop

2

define chorea

- Dance like movements, jerky movements

3

dystonia

- spastic contraction of muscles

4

blepospasm

- involuntary blinking of eyes

- holding them shut

5

aphetosis

- snake like movements of upper extremities (especially digits)

6

hemiblallsim

- subthalamic nucleus lesion

- involuntary on one side of body (flinging, kind of violent)

7

Parkinson's characteristics

- tremors, rolling motion (roll thumb between forefinger)

- defecits starting movements and turning

- have a masked face (no expression - lack of facilitation of facial muscles)

- reptilian stare (no blinking or slowed blinking)

8

what surgical intervention can be used in parkinson's syndrome

- removal of pallidum allowing for easiler facilitaiton of movements

9

describe cerebellum

- PRECISION

- Integration of equilibrium and locomotion

- integration of head and eye movements (MLF)

- coordinating voluntary movements

--> comparing cortical input with motor output (corticopontocerebellar pathway)

--> providing feedback for ongoing movements (dentorubrothalmic pathway)

--> making adjustments to ongoing movements (vestibulospinal, rubrospinal pathways)

--> ensuring accurate targeting

make precise.... on tine.... on target

10

dysmetria

- abnormal trajectory

- midline or hemispheric

11

tandem walking

- heel to toe walking

- lesion to the midline of cerebellum (axial musculature) they have equal amount of chance to fall to either side; just affects stability

- lesion in the hemisphere will result in falling to SIDE OF LESION (right lesion - falls to the right)

12

finger to nose test

- shows dysmetria on the IPSILATERAL side of the lesion

13

anterior inferior cerebellar

- gives off branches to caudal pons, rostral medulla

14

posterior inferior cerebellar

- gives off branches to the lateral surface of medulla

15

superior cerebellar artery

- runs over and gives off branches to the midbrain and maybe some to tectum

16

SCA syndrome

- results in IPSILATERAL dysmetria, limb ataxia

- contralteral pain and temp loss

- contralteral superior oblique paralysis

Ipsilateral hornor's syndrome

--> drooping of upper lide, constricted pupils, flushed, dry face

17

describe limbic system

- Hippocampus = MEMORY

--> short term memory

--> consolidation into long term memory

- Amygdala = fear

--> basic drives (fear, rage, sexual arousal)

--> organizing behavior appropriate to drives

18

lesion in uncus hippocampus amygdala

- foul but unidentifiable odor accompanied by strong feelings of deja vu

- sweats profusely, his heart races and he gets dry mouth and upset stomach

- violence

19