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Samenvatting Neurowetenschappen Open Vragen (Behaald Resultaat: 17/20)

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Dit bevat uitgebreide antwoorden op de lijst met open vragen opgesteld door Alain Labro. Op het examen wordt er een vraag gesteld van deze lijst en dit telt voor 20 procent mee.

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Uploaded on
November 2, 2020
Number of pages
13
Written in
2020/2021
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Summary

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Open vragen
Neurofysiologie

Hoofdstuk 10 tot 12

Geef de basis classificatie van neuronen en bespreek ruimtelijke en tijdelijke sommatie van input
signalen en AP vuur frequentie ter hoogte van soma/ axon initieel segment.

Basis van classificatie van neuronen:

1.Afstand axonale projectie

o projecting of principal neuron: overbrugt verschillende regio´s: lange afstand zoals
teen naar ruggenmerg
o interneuron: blijft in zelfde regio (lokaal)

2. Patroon van dendritische boom (kan spiny of aspiny zijn)

o pyramidale vorm: duidelijk onderscheid tussen dendrieten en axon
o radiale vorm: geen duidelijk onderscheid dendrieten en axon
o bij de spines zien we lokale verhoogde concentratie aan Ca wat leidt tot
geometrische veranderingen dus invloed op membraanpotentiaal en AP.

3. Aantal processen

o unipolair: 1 proces (signaal wordt enkel doorgegeven en niet verwerkt). Het signaal
wordt rechtstreeks doorgegeven.
o bipolair: 2 processen (beperkte verwerking van signaal)
o multipolair: veel processen (veel inputs die worden verwerkt aangezien er veel
vertakkingen zijn)
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