Motor control: descending commands and clinical eval Flashcards Preview

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Flashcards in Motor control: descending commands and clinical eval Deck (12):
1

where does planned movement begin

premotor and supplementary motor cortex

2

what can be measured to see planned movement and where

B-potential before movement happens in the pre-motor area

3

what are the 4 descending motor pathways and which are in stem

1. corticospinal
2. rubrospinal - stem
3. vestibulospinal - stem
4. reticulospinal - stem

4

what are 4 ways the brain controls movement

1. control reflex gain
2. select motor program
3. activate groups of M-neurons
4. activate indiv. muscles

5

what is special about fine finger movements

in humans there is a monosynaptic control from the cortex

6

5 signs of UMn lesions

1. paralysis
2. incr. reflexes (clonus and spastcity)
3. clasp knife rigidity ( incr. tone)
4. babinski response

7

5 signs of LMN lesion

1. atrophy
2. fasiculations
3. decreased tone (not really)
4. decresed reflexes
5. no babinski

8

2 disorders of tone

1. spasticity - increased velocity dependent tone with exageratted stretch reflexes
2. clonus - rapid succession of stretch reflexes, best felt at ankle

9

what is sign in stroke UMN

upper body flexor and lower body extensor

10

2 aspects of exaggerated stretch reflexes

1. increased amplitude
2. increased briskness

11

what is clasp knife phenomenon

mixed spacticity and altered flexion reflex

12

pharma and non pharm treatment of spactisicy

pharma - weaken muscles - botox or reduce transmission between affert and motoneuron - baclofen
non-pharm - PT, stretch

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