From single neurons to the clinical EEG: neurophysiological basics (two parts). A few formulas, only.
Part 1: spiking neurons, local field potentials, current dipoles
Part 2: from current dipoles and columns of pyramidal cells to EEG
Presentation slides
EEG Essentials Some essentials (clinical) of the human EEG (pdf).
Papers
A revised glossary of terms (pdf) most commonly used by clinical electroencephalographers can be found here.