Neuron: Any of the impulse-conducting cells that constitute the brain, spinal column and nerves.

K-complex: The largest event in healthy human EEGs; occurs in deep sleep.

Neuroscientist: A scientist who studies the brain and the nervous system.

EEG: A graphic record of the electrical activity of the brain as recorded by an electroencephalograph

Epilepsy: Any of various neurological disorders characterized by sudden recurring attacks of motor, sensory or psychic malfunction with or without loss of consciousness or convulsive seizures.