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Blok 1.5 - OG 3: Al die bewegingen... (praxis): Samenvatting
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In dit document vind u OG 3 terug die gaat over praxis/motoriek. Ook zijn er afbeeldingen aanwezig in de samenvatting.
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OG 3: Al die bewegingen (praxis)Samenvatting
Blok 1.5
3 BASISPROCESSEN IN CZS
1. Initiëren van de beweging
● Besluit tot beweging
● Vaststellen richting, snelheid & doel
● Commando niveau
2. Programmeren van beweging
● In actie brengen v juiste spiergroepen (in juiste volgorde)
● Coördinatie niveau
3. Uitvoeren van beweging
● Activatie motorische eenheden
● Bediening motorische eenheden met juiste frequentie ap
● Perifeer servosysteem
ORGANISATIE: 3 NIVEAUS
, COMMANDO NIVEAU
Ligging
● Cerebrale cortex (vooral frontaal deel)
○ Primaire motorische cortex
■ Gelegen voor gyrus precentralis
■ Somatotopische indeling: ieder gebied op schors gaat bepaalde
spiergroep aansturen
■ Verantwoordelijk voor: uitvoering bewegingen
○ Premotorische velden
■ Supplementaire motorische cortex (secundair)
● Onbewuste sturing in samenwerking met cerebellum & basale
ganglia (spierspanning)
● Verantwoordelijk voor: programmering v beweging
■ Premotorische cortex (tertiair)
● Stuurt bewegingen v axiale spiergroepen
● Meestal via extrapiramidale baan
Functies
● Initiatie
● Programma versturen
● Willekeurige bewegingen w aangezet &
gestuurd
COÖRDINATIE NIVEAU
Ligging & onderdelen
● Cerebellum (kleine hersenen)
○ 3 delen:
■ Archi/vestibulocerebellum
● Evenwicht behouden → input v evenwichtsorgaan
● Regulatie v oogbewegingen tov hoofdbewegingen (vestibulo-
oculaire reflex)
■ Paleo/spinocerebellum
● Tonus & houdingsregulatie
● Input v proprioceptieve & exteroceptieve structuren
● Verwerking sensorische feedback obv efferentie kopie
■ Neo/cerebrocerebellum
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