Perifeer zenuwstelsel
Hersenenzenuwen
Ruggenmergzenuwen
Zenuwen van het vegatieve zenuwstelsel.
3 hersenvliezen
Dura mater ( harde vlies)
Arachnoidea mater (spinnenwebvlies)
Pia mater (zacht vlies)
Ken ze van buiten naar binnen
Bij achterhoofdsgat gaan hersenvliezen over in ruggenmergvliezen
Hersenvocht = liquor cerebrospinalis.
Liquor
Weefselvocht (afkomstig uit bloed)
Vorming in plezus choroideus (ventrikelwand- pia mater
500 ml per dag
Functies
Aanvoeren 02, voedingsstoffen bijv glucose
Afvoeren afvalstoffen
Constante inwendige druk
Bescherming tegen stoten en schokken
Ondersteunt gewicht van hersenweefsel
Bloed hersenbarrière
Selectief doorlaten van stoffen
Liquor heeft constante samenstelling.
Doorbloeding aanvoer
- Hoog zuurstof en glucose verbruik
- 750 ml bloed/min naar hersenen
- Lastig: tegen zwaartekracht in
,
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