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Samenvatting Motorische banen en craniale zenuwen

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Samenvatting van de motorische banen en het verloop van de craniale zenuwen.

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Uploaded on
June 14, 2023
File latest updated on
June 14, 2023
Number of pages
8
Written in
2022/2023
Type
Summary

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Overzicht motorische banen
Dalende motorische banen
Corticospinale baan
Oorsprong : premotorische, motorische, sensorische, parietale cortex
1. Corona radiata
2. Capsula interna
3. Cerebrale pedunkel
4. Descussatio pyramidis
-> laterale corticospinale baan : 80% contralateraal, 10% ipsilateraal
-> anterieure corticospinale baan: 10% ipsilateraal
5. Motorische voorhoorncel

Motorische regio voor bovenste ledematen -> lateraal
Motorische regio voor onderste ledematen -> mediaal

Stijgende sensorische banen
Bewust sensorische input (corticaal)
-> exteroceptief via de spinothalamische baan: ruggenmerg -> thalamus
 Tastzin, pijnsensatie, temperatuurszin
-> proprioceptief via lemniscaal systeem
 Vibratiezin en positiezin

Onbewuste sensorische input (cerebellair)
-> interoceptief
-> proprioceptief
 Dorsaal spinocereballaire tractus (OLM)
 Cuneocerebellaire tractus (BLM)

Spinothalamische baan
1. Dorsaal ganglion
2. Nucleus proprius -> schakeling van eerste neuron met tweede neuron
3. Opstijgen contralateraal -> hersenstam
4. Laterale spinothalamische tractus
-> onderste lidmaat: dorsaal – lateraal
-> bovenste lidmaat: centraal – mediaal
5. VPL nucleus van de thalamus: schakeling tweede derde neuron
6. Somatosensorische cortex
-> sensibele zone aangezicht -> lateraal
-> sensibele zone lidmaat -> mediaal

Lemniscaal systeem
1. Dorsaal ganglion
2. Fasciculus cuneatus (arm), fasciculus gracilis (been)
3. Nucleus cuneatus (lateraal), nucleus gracilis (centraal) -> schakeling eerste en tweede neuron
4. Lemniscus medialis
5. VPL nucleus thalamus: schakeling tweede derde neuron
6. Somatosensorische cortex

, Spinocerebellaire tractus
1. Dorsaal ganglion
2. Achterste nucleus van clarke
-> achterhoorn T1-L2
-> Onder L2 via fasciculus gracilis
3. Dorsaal ganglion
4. Dorsale spinocerebellaire tractus
5. Inferieur cerebellair pedunkel

Cuneocerebellaire tractus
1. Dorsaal ganglion
2. Nucleus cuneatus accesorius
3. Cuneocerebellaire tractus
4. Inferieur cerebellair pedunkel


Overzicht zenuwen
N. olfactorius
 Olfactorisch epitheel
 Olfactorische zenuw ; tractus en bulbus
 Olfactorische cortex

N. opticus
 Retinale ganglioncellen vormen de n. opticus
 Chiasma opticum
 Tractus opticus
 Radiatio optica
o Laterale radix: 90% corpus geniculatum laterale
o Mediale radix: 10% colliculi superiores -> lichtreflex
 Visuele cortex

N. oculomotorius
MOTORISCHE VEZELS
Kern: colliculus superior
 Interpedunculaire fossa
 Os petrosum
 Sinus cavernosus
 Fissura supraorbitalis
 Bovenste tak: m. rector superior, m. levator palpebrae
 Onderste tak: m. rector medialis, inferior, m. obliquus inferior

PARASYMPATHISCHE VEZELS
Kern: subnucleus edinger-westphal
 Takt af van onderste tak
 Ganglion ciliare
 Korte ciliaire vezels door lamina cribrosa sclera
 M. ciliaris en m. constrictor pupillae

N. trochlearis
Kern : colliculus inferior

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