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samenvatting les 2 zenuwstelsel
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samenvatting van les 2 zenuwstelsel in revaki
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AUTONOOM ZENUWSTELSEL Autonoom zenuwstelsel
o Bestaat uit parasympathisch stelsel (vertering/rust) en orthosympathisch stelsel
(actie/angst)
o Meeste organen worden door beide stelsels bezenuwd, BEHALVE de huid en de
bloedvaten, deze worden enkel door de orthosympathicus bezenuwd.
o Het enterisch zenuwstelsel (voor de darmen) wordt vaak als apart stelsel beschouwd.
o Motorische of efferente banen => ortho- en parasympathicus
o Sensibele banen (pijn)
, o visceromotorische (efferente)
uit laterale hoorn via radix ventralis naar spieren
o viscerosensibele (afferente) zenuwvezels
van nn. splanchnici naar radix dorsalis en eindigt in achterhoorn
Anatomische ligging motorische kernen
o De motorische kernen van de parasympathicus liggen in:
de hersenstam (4)
de laterale hoorn van het grijs merg van de segmenten S2-S4 (S1-S3)
= craniosacraal systeem
o De motorische kernen van de orthosympathicus liggen in:
de laterale hoorn van de ruggenmergsegmenten (C8) T1 – L2
= thoracolumbaal systeem
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