Summary
Samenvatting AFP Zenuwstelsel, Kennisweek 1, OP4, jaar 1 (OVK14GPK01)
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Samenvatting van AFP zenuwstelsel, kennisweek 1, OP4, leerjaar 1. OVK14GPK01
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By: SandraVerpleegkunde • 2 year ago
nice and clear summary.
By: ElizeHBOV • 2 year ago
It's a nice, compact summary that shows the key points about the nervous system!
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ZenuwstelselDeel II (Deel I → OP3)
Samenvatting AFP Kennisweek 1, OP4
Inhoud
Centraal zenuwstelsel (CZS) .................................................................................................................... 2
Trunchus cerebri.................................................................................................................................. 2
Functies ........................................................................................................................................... 2
Formatio reticularis ......................................................................................................................... 2
Thalamus ............................................................................................................................................. 3
Functie ............................................................................................................................................. 3
Bewustzijn ............................................................................................................................................... 4
Inhoud ............................................................................................................................................. 4
Helderheid ....................................................................................................................................... 4
Oorzaak bewustzijnstoornissen....................................................................................................... 4
Coma.................................................................................................................................................... 4
Glassgow-comaschaal /EMV-score ................................................................................................. 4
Oorzaak............................................................................................................................................ 4
Limbische systeem .................................................................................................................................. 5
Functies ............................................................................................................................................... 5
Verslaving ................................................................................................................................................ 6
Verslavende middelen ......................................................................................................................... 6
Oorzaak van verslaving........................................................................................................................ 7
, Centraal zenuwstelsel (CZS)
Grote hersenen, kleine hersenen, hersenstam en het ruggenmerg
1. Cerebrum → grote hersenen
2. Cerebellum → kleine hersenen
3. Trunchus cerebri → hersenstam
a. Middenhersenen
b. Pons
c. Medulla oblongata
4. Medulla spinalis → ruggenmerg
5. Foramen magnum
Sensorische prikkels. Ascending (opstijgende) tracts.
Afferent naar de hersenen toe.
Motorische prikkels. Descending (afdalende) tracts.
Efferent van de hersenen af.
Trunchus cerebri
Hersenstam
Functies
• Regulatie van hartslag
• Vasomotorisch centrum → regelt de omvang van de bloedvaten (denk aan vasoconstrictie en
vasodilatatie).
• Regulatie ademhaling
• Temperatuurregulatie
• Braakregulatie
• Paraatheid en bewustheid
Formatio reticularis
De functionele kern van de hersenstam. = diffuus netwerk van korte neuronen over de hele lengte
van de hersenstam.
Functie
Dit centrum reguleert het functieniveau van het CZS, de staat van paraatheid. Daartoe ontvangt het
informatie (afferent) uit de zintuigen, bewegingsapparaat enz. Omgekeerd staat de formatio
reicularis in verbinding (efferent) met de grote hersenen, tussenhersenen en het ruggenmerg.
ARAS
Afferenten: Ascenderende Reticulaire ActiveringsSysteem → opstijgende
Actief bij alertheid
DRAS
Efferenten: Descenderende Reticulaire ActiveringsSysteem → dalende
Schade aan de ARAS en DRAS → daling van de bewustheid of bewusteloosheid.
Actief bij wegzakken van bewustzijn → slaap
2
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