EEG Flashcards
An ERP is the summation of…
postsynaptic potentials in pyramidal cells.
What is a postsynaptic potential?
When neurotransmitter bind to the membrane of the postsynaptic cell.
What is an electric dipole?
A separation of positive and negative charges.
Scalp electrodes measure the voltage from…
the summation of multiple dipoles.
Observed ERP waveforms reflect the sum of several independent…
latent (hidden) components.
The temporal resolution of EEG is in…
milliseconds.
What are the advantages of EEG?
High temporal resolution
Relatively cheap (compared with fMRI)
Non-invasive
ERP component is a scalp-recorded voltage change that reflects specific…
neuro-cognitive processes.
What areas of basic research can be done with ERPs?
Attention
Memory
Language
Visual cognition
What areas of clinical research can be done with ERPs?
Schizophrenia
Neurodegenerative disorders
Depression & anxiety
What is divergence of temporal resolution?
When waveforms for 2 conditions (e.g. - faces and cars) diverge.
Divergence allows us to say that the brain…
discriminates between 2 conditions at a specific time.
EEG can explain the time course and stages of _______ _______ & _______ ________.
stimulus processing, decision making
Divergence cannot tell us…
when discrimination between conditions begins.
What is sub-division of processing?
Identifying differences between ERPs at different time points.