delta wave


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delta wave

n.
An electrical oscillation occurring in the human brain at a frequency of less than about four hertz as recorded on an electroencephalogram, associated with a state of deep sleep or unconsciousness. Also called delta rhythm.

del′ta wave`


n.
any of the slow brain waves constituting delta rhythm.
[1935–40]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.delta wave - the normal brainwave in the encephalogram of a person in deep dreamless sleep; occurs with high voltage and low frequency (1 to 4 hertz)
brain wave, brainwave, cortical potential - (neurophysiology) rapid fluctuations of voltage between parts of the cerebral cortex that are detectable with an electroencephalograph
References in periodicals archive ?
Neuroimaging studies on fibromyalgia patients have revealed functional sleep disturbances including reduced short-wave sleep and the presence of abnormal [alpha]-rhythms or waves (usually present when we are awake, but relaxed), during delta wave deep sleep, which suggest frequent awakenings during non-REM sleep (stages 1-4).
The astounding findings, which could lead to both medical and ethical challenges concerning postmortem organ donation, were based from 'single delta wave bursts [which] persisted following the cessation of both the cardiac rhythm and arterial blood pressure (ABP).
Patient's rhythm was reverted to sinus rhythm and repeat ECG showed short PR interval and delta wave in V1, V2, V3, V4.
The Arruda ECG algorithm included delta wave polarity in its design while the Taguchi ECG algorithm included R/S ratio.
Infants below 2 years posess irregular delta wave activity(2-3.
Subsequent EP studies demonstrated that the patient had an accessory atrioventricular (AV) tract, causing electrical activity in the heart to bypass the AV node, resulting in a delta wave on EKG (FIGURE 3, GREEN ARROWS).
A Delta wave soldering machine equipped with a spray nozzle fluxer, three bottom side preheaters, and nitrogen was used.
Whereas delta wave brain activity seems to be modulated by the cholinergic transmitter system, theta brain activity is related to the neurotransmitter, noradrenaline.
12 seconds and the QRS complex contains an initial slur called the delta wave that broadens the complex.
Additional data: EKG was done revealing normal sinus rhythm with no evidence of ectopic activity, pre-excitation, or delta wave.