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PSY2002 Cognitive > fMRI > Flashcards

Flashcards in fMRI Deck (5)
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1
Q
Neurons
A
Differ in length and size

Conduct electrical impulses in brain to send messages

Allow communication in brain
2
Q
fMRI
A
Oxygen delivered to neurons by haemoglobin in capillary red blood cells

Haemoglobin diamagnetic when oxygenated
Paramagnetic when deoxygenated

Diamagnetic= strong magnetic field
Paramagnetic= weak magnetic field
BOLD response

Initial dip in the haemodynamic blood flow followed by an increase that overcompensated for the amount of oxygen used

Happens after approx 4 seconds
3
Q
fMRI vs EEG
A
fMRI is exact location

EEG is how fast the response is -> not exact location
4
Q
Culture impact on face processing

Adams et al (2010)
A
Accurate when identifying own culture
High cultural bias

Stronger patterns of activation when viewing faces from own culture
Culturally tuned neural activity in bilateral pSTS

High level of consistency in neural responses when deciding mental states from eyes

Own race bias in ability to infer mental states seen via consistent brain activity

Cultural consistency in neurological architecture

pSTS involved in facial recognition
5
Q
Autistic vs neurotypical

Kana (2016)
A
Autistic = reduced activation in MPFC and pSTS relative to neurotypical ppts for implicit emotion processing

Both activated similar network when explicitly asked to identify emotional expressions a

Brain activity significantly different during implicit emotion processing

Implications: more explicit instructions for autistic individuals when emotion processing is required is helpful