100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Samenvatting Fysiologie naurotransmitters $7.50
Add to cart

Summary

Samenvatting Fysiologie naurotransmitters

 0 purchase
  • Course
  • Institution

Samenvatting over de neurotransmitters, hoofdstuk 3 van blokboek voor ZEZI

Preview 2 out of 6  pages

  • May 12, 2022
  • 6
  • 2021/2022
  • Summary
avatar-seller
AZ  hydroxylatie & decarboxylatie  amine

Tyr  Dopa  DOP  NOR  EPI

AC: ATP  cAMP + PPi PLC: PIP2  DAG + IP3

FR:




ACh
Immunocytochemie adhv choline-acetyltransferase of acetylcholinesterase, clear/translucent vesicles

Receptoren:

- Nicotine-R: ionotroop, NN,M, 2 ionen nodig voor opening van receptorkanaal  Na+ en K+ stijgt, perifere
cholinesterase inhibitor pyridostigmine bij myasthenia gravis
- Muscarine-R: metabotroop, M1-5, GPCR, direct of via 2de boodschapper, atropine als antagonist
o M1,3,5: stimulatie PLC  Ca2+ stijgt
o M2,4: inh. AC  K+ stijgt
o Farmaca bij Alzheimer: Memantine = inh., centrale cholinesterase inhibitor tacrine
- Postsyn. Na+-, K+-, Ca2+-stroom verandert  exciteerbaarheid verandert, AHP door activatie K +(Ca2+)-kanalen

Formatio reticularis met RAS met nucleus basalis van Meynert  cortex (diffuus over 6 lagen), thalamus, amygdala,
hypothalamus

Cholinerge dorsale nucleus  MS, hersenstam, thalamus, frontale en occipitale neocortex

Arousal = corticale activatie bij ontwaken en sensoriële input door N-&M 1,3,4-R (inh. & exc.) & signaal/ruis stijgt

Aandacht, perceptie, geheugen, cognitie, activatie REM

Inhibeert TRN= reticulaire nucleus thalami, dus disinhibitie van pathway tss thalamus en cortex



NOR
Immunocytochemie adhv afbraak door MAO & COMT (ook re-uptake), small dense core vesicles

Receptoren: met 2de boodschappers

- α1: postsyn., stimulatie PLC  daling K+  elektrische prikkelbaarheid stijgt
- α2: presyn. dus autoR dus inh., inh. AC  stijging K+, daling Ca2+  elektrische prikkelbaarheid verandert
- β1: stimulatie AC  daling K+  prikkelbaarheid stijgt  minder sterke AHP, op dendrieten van Glu
neuronen thv V1  verhoogde alertheid thv LGN
- β2: stimulatie AC

FR met locus ceruleus  cerebellum, gyrus cinguli, MS, hippocampus, amygdala, hypothalamus, thalamus, cortex

DMNV (X) & NTS (solitarius)  hypothalamus, amygdala, MS: ventrale noradrenerge bundel = lateraal tegmentaal
systeem

Alertheid bij onverwachte prikkels, stemming, gemoed,  limbisch systeem (gyrus cinguli, hippocampale cortex,
amygdala, (hypo)thalamus): angst, emotie, motivatie, seksueel gedrag

Spieratonie tijdens REM thv locus ceruleus

1

, DOP
Receptoren:

- D1-fam: D1,5: stimulatie AC, activeren Ca2+-signalisatie, exc.
- D2-fam: inh. AC, onderdrukken Ca2+-signalisatie via sluiting Ca2+-kanalen, meer K+
o D2: autoreceptor, minder availability bij farmaca
Parkinson en schizofrenie en bij novelty seeking
personality, in SNc en striatum
o D3: meer availability bij schizofrenie en
verslaving, in NA en hypothalamus
o D4: ADHD, in MS en MC en frontale cortex

PFC:

- Mediaal: plannen, preferences
- Dorsolateraal DLPFC: delayed reward, werkgeheugen
- Orbitofrontaal: foutcorrectie
- Ventromediaal VMPFC: foutcorrectie

Tubero-infundibulair systeem: inh. prolactinevrijstelling
(lactatie), reward learning, impulse control diseases zoals kleptomanie en pyromanie

Parkinson: nigrostriatale baan: SNc  striatum, 8 hypothesen, L-Dopa over BBB endotheel via L1 samen met perifere
decarboxylase remmer zoals benserazide, MAO-B inhibitoren zoals selegiline

Schizofrenie: onderactiviteit mesocorticale en overactiviteit mesolimbische baan: MC  PFC en limbische cortex 
neg. en pos. symptomen

Verslaving: overactiviteit VTANA baan, opiaten: μ-R op GABAerge neuronen  disinh., alcohol: disinh., nicotine:
stimulatie DOPerge neuronen, cannabinoïden: inh. GABAerge neuronen thv NAc, cocaïne en amfetamine remmen
re-uptake DOP, mediale PFC, amygdala en hippocampus sturen exc. Gluerge neuronen nr NA, deel hedonisch
systeem(voortzetting)

ADHD: hypoactiviteit DOP

Afbraak door MAO presyn en in gliacellen: Selegiline inhibeert

DAT=transporter voor presyn re-uptake: geremd door rilatine en cocaïne, amfetamine kan hier ook door en
stimuleert dan DOP vrijstelling  psychostimulantia verhogen c DOP in synaps



5-HT
<tryptofaan AA

Verwijderd uit synaps door re-uptake en afbraak door MAO: immuunhistochemie

Nuclei raphes: rostraal en caudaal  volledig CZS

Synaptic cradle: ook astrocyten en microgliacellen, ~noradrenerge synaps

Antidepressiva: re-uptake inh.: Prozac=fluoxetine of MAO inh.

Onderdrukt REM

Depressie: lage 5-HIAA in CSF: afbraakproduct, ook rol NOR en groeifactor voor neuronen, stress  Glu
excitotoxiciteit en verhoogd cortisol  neuronale apoptose




2

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller annavancaenegem. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $7.50. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

64450 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 15 years now

Start selling
$7.50
  • (0)
Add to cart
Added