1. a machine or instrument that records the electrical activity of the brain; an electroencephalograph.
Usage: medical/technical term; often abbreviated as EEG in clinical practice

Examples

• The neurologist used an encephalograph to monitor the patient's brain waves during the sleep study.
• An encephalograph can detect abnormal electrical patterns that may indicate seizure disorders.
• The hospital installed a new digital encephalograph in the neurology department.
• Technicians attached electrodes to the patient's scalp and connected them to the encephalograph.
• The encephalograph recording showed increased activity in the frontal lobe during the cognitive task.