The Source of the Electrical Potentials Recorded from the Scalp

Multiple Choice

The source of the electrical potentials recorded from the scalp of a subject is

A) the natural flow of electrical current along the outer cell layers of skin.
B) the signals generated by the contraction of muscle fibers that lie under the scalp.
C) the summated activity of nerve cell action potentials and postsynaptic potentials.
D) the signals generated by the activity of the sweat glands in response to stressors.
E) movement of ions generated by magnetic currents.