Which component is the primary generator of the EEG?

The primary generator of the electroencephalogram (EEG) is related to the activity of pyramidal neurons in the cortex, particularly their dendritic processes. Pyramidal cells are excitatory neurons that have long dendritic trees oriented in a vertical plane, which allows them to effectively summate the postsynaptic potentials from many synaptic inputs.

These cells generate postsynaptic potentials (PSPs) when they receive excitatory input, and the synchronized activity of a large number of pyramidal cells contributes to the electrical fields that can be detected on the scalp as EEG waves. The specific arrangement and orientation of these cells within the neocortex enable them to produce measurable voltage changes that can be picked up by EEG electrodes placed on the scalp.

While cerebellar granule cells and glial cell activation play important roles in overall brain function, they do not serve as the principal source of EEG signals. Cerebellar granule cells are more involved in motor coordination and do not contribute significantly to the cortical electrical activity recorded by EEG. Glial cells are crucial for supporting neuronal function but do not generate the electrical potentials that are measured in the EEG.

Neocortex neurons are indeed involved in generating EEG signals, but it is specifically the pyram