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Samenvatting NLT hersenen en leren 6 VWO
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Samenvatting van de module hersenen en leren NLT 6 VWO
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yanniekjongkind
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NLT hersenen en lerenHoofdstuk 3
CT-scan
Veel Röntgenfoto’s, telkens vanuit een andere hoek
Bouw van hersenen bestuderen. Met PET tumoren opsporen
Maakt gebruik van ioniserende straling
MRI-scan
Maakt gebruik van magneetveld → opgewekt door supergeleidende spoelen
Waterstofatomen in lichaam richten zich naar magneetveld; Als ze terug in
grondtoestand vallen, zenden ze radiosignaal uit
Driedimensionaal beeld van anatomie hersenen
Mensen met metaal kunnen niet in MRI-scanner
→ Allebei kunnen ze bepalen welke delen van hersenen beschadigd zijn en ze leveren zo
informatie over relatie tussen breingebieden en functies
fMRI-scan (functionele MRI)
Gebieden met grootste activiteit zichtbaar maken → Hogere ac viteit van zuurstof en
glucose
PET-scan
Patiënt wordt ingespoten met moleculen waarin radioactief atoom in voorkomt →
vervalt tot stabiel atoom
Positron botst tegen elektron → twee fotonen → schieten in tegenovergestelde
richting weg
EEG
Elektrische stroompjes buiten het brein meten
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