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Samenvatting Les 9 neurofysiologie: autonoom zenuwstelsel ()
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Samenvatting Les 9 neurofysiologie, autonoom zenuwstelsel, op basis van lesnotities en theorieslides.
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Les 9: autonoom zenuwstelsel= algemene opbouw van centraal zenuwstelsel
Algemene opbouw somatisch vs autonoom zenuwstelsel:
somatisch ZS:
- bewuste waarneming
- uitvoeren van willekeurige bewegingen
- integratie van opgenomen informatie
- aansturen van skeletspieren
soma van betrokken neuron op spinaal niveau
→ rechtstreekse axonale uitloper naar de
effectorcel (vb: skeletspier)
= 1 neuronsysteem
Autonoom ZS:
eerst soma op spinaal niveau
→ uitloper (niet rechtstreeks), maar naar
tweede autonoom neuron
→ vanuit tweede neuron dewelke soma
vaak in ganglion (cluster van neuronen) zijn
soma heeft gelegen vertrekt opnieuw
zenuwuiteinde
→ zenuwuiteinde gaat de effectorstructuren bezenuwen
, = 2 neuronsysteem
Autonoom zenuwstelsel
- Geen willekeurige controle
- Somatisch zenuwstelsel
- = bewust aansturen
- = veelal onder willekeurige controle
- Perifeer: scheiding autonoom – somatisch ZS
- Centraal: verbinden autonoom – somatisch ZS
- Functie:
- = regeling orgaanfuncties
- = homeostase
- synoniem: visceraal of vegetatief zenuwstelsle
in de middenhersenen
gelegen
vormt belangrijkste
structuur van autonoom
zenuwstelsel
Hypothalamus
- Hoogste integratiecentrum ~ autonoom ZS
- (Belangrijkste) Regelsysteem vegetatieve en endocriene processen
- vegetatieve = regeling werking
- endocriene = secretie hormonen interne organen
- Centraal: verbinden autonoom & somatisch ZS
- Functie:
- = regeling orgaanfuncties
- = homeostase
Hypothalamus: homeostase
Introductie van de term HOMEOSTASE
HOMEOSTASIS: the property of either an open system or a closed system,
especially a living organism, that regulates its internal environment so as to maintain
a stable, constant condition under varying external conditions
⇒ Evenwicht vitale functies
⇒ Intern milieu zo constant mogelijk houden
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