neuromethods of decision making Flashcards
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what are the methods of analysing the brain
VBT
DTI
methods of analysing brain functioning
RSFC
resting state functional connectivitly
methods of neurostimulation
tDCS
transcranial direct current stimulation
what is grey matter
neuronal cells and unmyelinated no myelin sheath axons
what is white matter
myelinated axons - connectivity
how do MRI’s work
exploiting the magnetic properties of hydrogen in brain
hydrogen becomes aligned with magnetic field
radio frequency pulse is applied that resonate at frequency into the body
protons
when RF pulse ends - hydrogen returns to equilibrium
released energy absorbed by this picked up by detector in MRI scan
grey and white matter show up differently
what were the results of the London taxi driver study
significant increase in posterior hippocampus grey matter volume in taxi drivers
positive corrolation between time as taxi drivers and posterior hippocampus
what happens with diffusion tensor imaging - what matter integrity
analysis of brain connectivity
myelin content - made by oligonucleotides
breakdown of myelin results in disruptive connectivity
what does functional MRI allow
allows researchers to create images distinguishing between active/inactive regions in the brain
what does BOLD stand for
blood
oxygen
level
dependent
meassures
what does bold measures and assume
neural activity
assumes systemic relationship between reigns of varying activity during different processes
what is resting state FMRI
functional connectivity by correlating bold time series across different parts of the brain
if bold in different regions are similar means info has passed through them
highlights differences in brain activity
default mode network
orbitofrontal cortext
value based decision making
dorsal lateral prefrontal cortext
association with outcome motoring
anterior cingulate cortext
associated with error monitoring
