Abstract: An electrode harness to be applied to a patient, for use with equipment for monitoring neurological function comprises a flexible adhesive-backed harness pad and a plurality of electrodes mounted on the harness pad such that the contact portions thereof are exposed on the adhesive side of the harness pad at predetermined locations on the pad, to thereby facilitate the accurate and consistent placement of the electrodes on the patient. The electrode harness may also include a pair of earpiece portions having associated electrodes thereon, the earpiece portions being contoured to readily facilitate the application of those portions to the patient's ears in an earring-type manner.

Abstract: Circuitry for use with a brain wave monitoring device is provided for selectively monitoring the impedance of the current paths in the patient's scalp concurrently with brain wave monitoring, and circuitry for self-testing the system for proper functioning.

Abstract: A brain wave monitoring device for monitoring brain wave activity measures the frequency and amplitude of brain wave signals from the left and right hemispheres of the brain. The brain wave signals are filtered and applied to an amplitude detecting device, and a frequency-to-voltage converter which employs a zero-crossing technique such that signal frequencies are detected independent of signal magnitude. The amplitude and frequency information is displayed on separate power and frequency displays on the front panel of the brain wave monitoring device. Each of the power and frequency displays employ a pair of linear LED arrays such that a "bar graph" of the amplitude and frequency of the brain waves is produced. Additionally, signals indicative of the power of the brain waves on the left and right hemispheres are selectively applied to a voltage controlled oscillator having an earphone output, such that the operator may listen for differences in amplitude between left and right hemisphere brain waves.