Glossary E

Glossary E

Electroconvulsive therapy (ECT) refers to a form of therapy used to treat depressed patients, in which brain seizures are created by passing an electric current through the head.

Electrocorticogram (ECoG) refers to a form of EEG in which electrodes are placed directly on the exposed cortex during surgery to isolate a precise location of brain pathology.

Electrode is defined as any device, such as a wire, needle, or metal plate used to electrically stimulate or destroy nerve tissue or to record its activity.

Electrodermal response refers to a measure of skin resistance to an electrical current Skin conductivity increases with increasing arousal and increasing perspiration. Electrodermal response is also known as Galvanic skin response.

Electroencephalogram refers to an electrophysiological measure of brain functioning whereby electrodes are taped to the surface of the subject’s scalp to record the electrical activity of the brain.

Electroencephalogram (EEG) refers to the
electrical measurements of brain wave activity.

Electrolyte imbalance is defined as a condition caused by loss of body minerals.

Electromagnetic spectrum is defined as continuum of electromagnetic energy that extends from very-short-wavelength gamma rays to long-wavelength radio waves. Visible light is a narrow band within this spectrum.