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Samenvatting Fijne tast en Proprioceptie

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Dit document bevat de uitleg en de samenvatting van het deel fijne tast en proprioceptie uit het hoofdstuk neurologie bij pathofysiologie 1.

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Fijne tast en proprioceptie

Bezenuwing van de huid Bezenuwing van het lichaam Bezenuwing van het aangezicht
de perceptie verloopt via lage drempel Via spinale zenuwen: komen de axonen van het Sensibel bezenuwd door nervus trigeminus:
mechanoreceptoren. PZS het CZS binnen. Deze heeft drie takken:
 Fast adapting responsen (FA): vuren kort  Oftalmische tak
bij het begin of het einde van een Dorsale wortel: draagt de sensibele vezels.  Mandibulaire tak
stimulus. Dermatomen = het distributiegebied van iedere  Maxillaire tak
 Slow adapting responsen (SA): blijven dorsale sensibele wortel.
aanhoudend actiepotentialen vuren bij Ventrale wortel: draagt de motorische vezels. Tanden, orale holte, nasale holte en craniale dura
aanhoudende stimulatie. w ook door deze nervus trigeminus bezenuwd.
Opdeling volgens receptieve veld:
 Type 1 vezels: kleine welomlijnde De zenuw komt hersenen binnen halverwege de
receptieve velden, vrij uniforme hoge pons en eindigt in de sensibele trigeminale
sensiviteit voor stimuli. => handpalmen, nucleus.
voetzolen.
 Type 2 vezels: groter, minder scherp
omlijnd receptief veld, sensiviteit neemt
geleidelijk af vanuit 1 centraal punt.
FA1, FA2, SA1, SA2
4 gespecialiseerde receptoren:
1. Meissner’s corpuscules (FA1)
2. Merkelse schijven (SA1)
1+2 = oppervlakkig in de huid, receptoren zijn
klein en georiënteerd; nemen stimuli waar die
op de bovenste huid drukken.
3. Ruffini receptoren (SA2)
4. Pacini receptoren (FA2)
3+4 = dieper in de huid, dekken groter gebied,
nemen traag veranderende of aanhoudende
stimuli waar.

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Uploaded on
January 14, 2022
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Written in
2020/2021
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SUMMARY

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