neuroscience Flashcards
the Brain contains several
billions of neurons
exchange electro-chemical signals - neural activity
how to measure brain activity
metabolic activity, electrical activity
metabolic activity if neurons are more active
they need more oxygen - indicate how much activity issuing on
fmri scans - measures oxygen levels
electrical activity being active means
exchanging electrical signals
EEG- uses electrodes on the scalp to measure changes in the electrical current produced by a large group of synchronised neurons
event related potential
pattern of activity that remind the asme for each occurrence of an event
lateralised readiness potential
shows how a manual response develops overtime
damage to the right parietal cortex after stroke results in
no deficit in perception ,movement or cognitive skills but consistently ignore the left half of the world
how to test visual neglect
line dissection task, object comparison test, implicit knowledge test
line bissection test
ask participants to bisect the line exactly
object comparison task
ask participants whether two objects are the same
implicit knowledge task
in which one of these would you prefer to live in - able to make implicit selective choices
lesion to primary visual cortex causes
scotoma- blindness in part of the visual field
subjective blindness
patients report not seeing anything in that area
objective blindness
patients do not respond to stimuli presented
localisation task
point when you see a flashing light
but patients only react to blind field stimuli when prompted. tell them to guess- good accuracy
