psych of perception chapter 2 Flashcards
recording electrode
inside the fiber
refernce electrode
outside the fiber
resting potential
-70mV
action potential
show propagated response
remain the same size regardless if stimulus intensity increases
ions - carry an electrical charge
Na+ (sodiom ions) positive charge
Cl- (chlorine ions) negative charge
K+ (potassium ions) positive charge
what makes neuron to depolorize?
sodium ions flow into the axon
what makes neuron repolorize?
potassium flows out of the axon
excitory transmitters
cause depolarization
neuron becomes more positive and the likelihood for action potential increases
inhibitory transmitters
cause hyperpolarization
neuron becomes more negative and the likelihood for an action potential to occur decreases
modularity
the idea that specific brain areas are specialized to respond specific types of stimuli or functions
each specific area is called a module
distributed representation
the idea that the brain represents information in patterns distributed across thecortex, not just brain area
multiple modules
structural connectivity
‘road map’ of fibers connecting different areas of the brain
fMRI
functional magnetic resonance
measures blood flow
brain activity takes up oxygen, which binds to hemaglobin and makes it more magnetic