An instrument, using electrodes attached to the scalp, that measures the minute electrical currents (brainwaves) generated by brain cells, especially in the cerebral cortex. See also, "brain," "brainwave coherence," "cerebrum" and "cortex."
A recording through the scalp of the electrical potentials from the brain and the moment-to-moment changes in these potentials. With the EMG and EOG, the EEG is one of the three basic variables used to score sleep stages and waking. Sleep recording in humans utilizes surface electrodes to record potential differences between brain regions and a neutral reference point, or simply between brain regions. Either the C3 or C4, central region, placement in the International 10-20 system is the standard electrode from which stage scoring is done.
a measurement of brain wave activity. This data is collected through sensors on the scalp.
A graphic recording of electrical activity of the brain, usually of the cerebral cortex, but sometimes of lower areas.
A graphic recording of electrical currents developed in the cerebral cortex during brain functioning. Sometimes called a Brain wave test. A machine called an electroencephalograph records the pattern of these electrical currents on paper.
a technique for recording electrical activity in the brain.
A diagnostic technique which measures the electrical activity of the brain, i.e., the brain waves.
(EEG) • A graphic recording of electrical potentials from the brain.
A test that records electrical events in the brain.
Electroencephalogram [EEG] is a tracing of electrical activity arising from brain function.
recording through the scalp of electrical potentials from the brain and the changes in these potentials. The EEG is one of the three basic variables (along with the EOG & EMG) used to score sleep stages and waking. Surface electrodes are used to record sleep in humans, recording potential differences between brain regions and a neutral reference point, or between brain regions.
A procedure in which brain waves are recorded using electrodes which are stuck to the scalp.
(e-lek´´tro¯-en-sef´ah-lo-gram) A measure of electrical brain activity.
Electrical potentials generated from the brain that can be measured at the surface of the skull. Provides a direct measure of neural activity.
A device used to measure and record electrophysiologic changes in the surface of, or within the substance of, the brain.
A tracing to record electrical discharges in the brain. The pattern of EEG reflects the state of the person's brain and level of consciousness. EEG is used to detect and locate disease such a tumours and epilepsy.
Record of electrical activity of the brain obtained from scalpelectrodes.
a graphical record of electrical activity of the brain; produced by an electroencephalograph
a non-invasive test which detects and records electrical impulses on the surface of the brain
a painless test that records electrical patterns in your brain (brain wave activity)
a recording which shows the variations in electrical potentials at a number of scalp sites
a medical procedure that records patterns of electrical activity in the brain.
Aa technique for recording electrical activity in the brain.
a test in which the electrical signals of the brain are recorded. This electrical activity is detected by electrodes, or sensors, placed on the patient's scalp and transmitted to a polygraph that records the activity.
electro-en'seflo-gram; EEG The record, obtained by means of the electroencephalograph, of the brain potentials derived from scalp electrodes Brain waves Term: Definition: Description: . . . .
also called an EEG; the measurement and recording of brain wave activity. Frequency measurement in hertz ranges from below 3.5 per second (delta), 4 to 7.5 second (theta), 8 to 12 second (alpha), and above 13 second (beta). Electrodes are typically placed at C3 and C4 positions on the scalp.
The recording of electrical activity of the brain by positioning electrodes on the scalp.
A test that measures the electrical activity of the brain. A “flat-line” EEG, or one showing the total absence of electrical activity, is one indicator of brain death.
A record of the electrical activity in the brain.
a method of recording and analyzing the electrical activity of the brain.
A medical device for monitoring the electrical activity of the brain.
a measurement of the electrical activity associated with brain activity.
A method of recording the brain's continuous electrical activity by means of electrodes attached to the scalp.
A procedure that uses electrodes on the scalp to record electrical activity of the brain. Used for detection of epilepsy, coma, and brain death.
a procedure that records the brain's continuous electrical activity by means of electrodes attached to the scalp.
a test in which the electrical signals of the brain are recorded. Electrical activity detected by electrodes, or sensors, placed on a person's scalp are transmitted to a machine that records the activity.
A diagnostic test of brain electrical activity; helpful in diagnosing epilepsy.
Usually referred to as EEG. It records your brain wave activity when you are concentrating, asleeep, and awake.
A technique for recording the pattern of electrical currents inside the brain.
a diagnostic test that measures brainwaves, the electrical impulses in the cerebral cortex. This test helps a doctor to diagnose epilepsy.
A study of electrical current within the brain. Electrodes are attached to the scalp. Wires attach these electrodes to a machine which records the electrical impulses. The results are either printed out or displayed on a computer screen. Electroencephalogram is abbreviated EEG. See the entire definition of Electroencephalogram
A graphic record of the electrical activity of the brain as recorded by an electroencephalograph. Also referred to as an encephalogram.
A procedure used for the detection of epilepsy, coma or brain death; uses electrodes on the scalp to record electrical activity of the brain.
A record of the summed activity of cortical cells picked up by wires placed on the skull.
A procedure that measures the amount and type of brain wave activity using electrodes placed on the surface of the scalp.
The electroencephalogram measures brain wave activity. It can detect seizures and other causes of brain damage.
An electroencephalogram is a device which records the electrical activity from different parts of the brain and converts it into a tracing called an electroencephalogram or EEG. The machine that records this activity is known as an encephalograph. The pattern of the EEG reflects the state of the patient's brain and the level of consciousness in a characteristic manner. A recording of the electrical impulses of the brain can be used to diagnose certain diseases (such as epilepsy), furnish information regarding sleep and wakefulness, and confirm brain death.
Record of electrical activity of the brain obtained from scalp electrodes.
a recording of the electrical activity of the brain, used to diagnose neurological conditions such as seizure disorders (epilepsy).
(EEG): A measurement of the brain's electrical activity. The EEG is derived from sensors pasted in various spots on the scalp, which react to the activity of neurons in a particular region of the brain (e.g., beneath the forehead, temples, etc.).
A graphic record of the electrical activity of the brain made by attaching electrodes to the scalp.
A recording of the electrical impulses of the brain using electrodes attached to the scalp.
(EEG)-- the brain's electrical output as measured on the scalp.
(e-lek-tro-en-sef-ah-lo-gram): Recording of the electrical activity from various parts of the brain. It is used to study the brain's electrical activity, which may be used to help make a diagnosis of mental disorders.
electrical measurements of brain wave activity.
A record of the activity and types of brain waves illustrated as a graph.
Recording of electrical activity of brain from the surface of the head. Reflects the summed activity of the neural tissue and has characteristic patterns depending on the state of the subject.
A record of brain electrical activity.
A record obtained by attaching electrodes to the scalp (or occasionally to the exposed brain). Among the brain waves observed are alpha waves (8-13 Hz), characteristic of relaxed wakefulness; delta waves (1-3 Hz), a slower wave of high amplitude that occurs during deep sleep; and theta waves (4-7 Hz), a pattern characteristic of the EEG of the hippocampus and indicative of behavioral arousal.
A chart that provides a record of the electrical activity of the brain. which is derived from electrodes placed on the scalp. The instrument used is an electroencephalograph. An electroencephalogram is useful in diagnosis of seizure disorders and tumor detection.
a graphical record of the electrical activity of the brain. Electrodes are placed on the scalp to obtain this information.
A recording of the electrical activity generated by the brain. Brain wave frequencies are expressed in hertz (Hz) or cycles per second (cps), and amplitude is expressed in microvolts. Characteristic frequency and amplitude patterns of the activity define which stage of sleep the patient is experiencing. Brain waves are recorded in both diagnostic and CPAP titration sleep studies.
A graphic record of the electrical impulses produced by the brain.
An electroencephalogram is a noninvasive procedure to chart electrical impulses of the brain. An EEG is used to help locate the origins of seizures.