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Samenvatting zenuwstelsel deel 2
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Samenvatting college zenuwstelsel deel 2
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kellydejonge1
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Zenuwstelsel deel 2Hersenstam
- Middenhersenen (mesencephalon)
o Visuele en auditieve reflexen
o Reguleren spiertonus
- Pons
o Verbinding met cerebellum (kleine hersenen)
o Betrokken bij beheersing beweging
- Medulla oblongata
o Schakeling sensorische informatie
o Reguleert autonoom functioneren
Mesencephalon
- Colliculus inferior en superior
Visuele en auditieve reflexen
o Colliculus inferior: regelt reflexbeweging van hoofd, hals en romp t.g.v.
gehoorprikkels
o Colliculus superior: regelt reflexbewegingen van de ogen, hoofd en hals t.g.v.
gezichtsprikkels
Formatio reticularis
- RAS – waaksysteem (aurosal) -> wakker worden
Substantia nigra -> dopamine
- Beschadiging: toename van de spiertonus -> tremor
o parkinson
pons !
- verbinding tussen cerebellum met het mescencephalon, diencephalon, het ruggenmerg en
het cerebrum
- snelheid en diepte van de ademhaling, snelheid van de hartslag
- verfijnen van bewegingen (vrouwen beter -> seks)
medulla oblongata !
- verbinding van hersenen met ruggenmerg
o hartregulatiecentrum
reguleren hartslag en de bloeddruk
kracht hartcontracties
bloedstroom
o ademhalingscentrum
ritme ademhaling en diepte
deze activiteiten worden aangepast door de pons
cerebellum (kleine hersenen) !
- aanpassing houdingsspieren
- slaat bewegingspatroon op
- heeft geen geheugenfunctie
- stemt de meeste bewegingen af
- pons past bewegingen aan
- cerebellaire ataxie -> beschadiging van het cerebellum
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