The electrical current that can be captured by EEG is created during excitation of the dendrites in pyramidal neurons in the cerebral cortex.
Because the signal of a single cell is weak and has to pass through many layers, such as skin and skull before reaching the electrodes, only large populations of active neurons can generate recordable electrical activity.
The weak signals reaching the electrodes placed on the scalp are then massively amplified and displayed on paper or stored electronically.
Interpreting EEG data
Although each individual’s brain wave patterns are unique and complex, some patterns can be generalised and associated with certain states. This is what we will be trying in our immersive exhibition.