electroencephalogram /elec·tro·en·ceph·a·lo·gram/ (EEG) (-en-sef´ah-lo-gram″) a recording of the potentials on the skull generated by currents emanating spontaneously from nerve cells in the brain, with fluctuations in potential seen as waves. 
Electroencephalogram (EEG)
electroencephalogram (EEG)
electroencephalogram
)
Electroencephalogram. Recordings made while the subject was excited, relaxed, and in various stages of sleep. During excitement the brain waves are rapid and of small amplitude, whereas in sleep they are much slower and of greater amplitude.
e·lec·tro·en·ceph·a·lo·gram ( -l k tr -n-sf  -l-gr m)n. Abbr. EEG A graphic record of brain waves as recorded by an electroencephalograph. |
Electroencephalogram (EEG)
A record of the tiny electrical impulses produced by the brain's activity. By measuring characteristic wave patterns, the EEG can help diagnose certain conditions of the brain.
electroencephalogram (EEG)
[ilek′trō·ensef′ələgram′]
Etymology: Gk, elektron + enkephalos, brain, gramma, record
a graphic chart on which is traced the electric potential produced by the brain cells, as detected by electrodes placed on the scalp. The resulting brain waves are called alpha, beta, delta, and theta rhythms, according to the frequencies they produce, which range from 2 to 12 cycles per second with an amplitude of up to 100 μV. Variations in brain wave activity are correlated with neurologic conditions, psychologic states, and level of consciousness. See also encephalography.
electroencephalogram
the record produced by electroencephalography; a tracing of the electric impulses of the brain. Called also EEG.
electroencephalogram
Neurology A graphic recording of minute electric currents produced by neuronal activity scalp electrodes, which is used to diagnose neurologic disorders and in neurophysiologic research
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