electrooculogram


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Related to electrooculogram: Electrooculography

e·lec·tro·oc·u·lo·gram

(ē-lek'trō-ok'yū-lō-gram),
A record of electric currents in electro-oculography.

e·lec·tro·oc·u·lo·gram

(ĕ-lek'trō-ok'yū-lō-gram)
A record of electric currents in electrooculography.

electrooculogram (EOG)

Recording of eye movements and eye position provided by the difference in electrical potential between two electrodes placed on the skin on either side of the eye. The EOG consists of two potentials: the standing potential (resting potential, dark phase, dark current) which is evoked by moving the eyes in the dark and originates from the retinal pigment epithelium and the light potential (light rise) which is evoked by moving the eyes in a lighted environment and originates from the photoreceptors. Clinically, the ratio between the light and dark potentials (sometimes also called the Arden index or Arden ratio) is assessed. If that ratio is less than 1.8 it indicates a malfunction of the structures from which the potential originates. The EOG is also used to monitor eye movements (Fig. E3). See Best's disease; fundus flavimaculatus; resting potential of the eye.
Fig. E3 Principle of electrooculography. The eye acts as a dipole in which the anterior pole is positive and the posterior pole is negative. 1. Left gaze; the cornea approaches the electrode near the outer canthus resulting in a positive-going change in the potential difference recorded from it. 2. Right gaze; the cornea approaches the electrode near the inner canthus resulting in a positive-going change in the potential difference recorded from it (A, an AC/DC amplifier)enlarge picture
Fig. E3 Principle of electrooculography. The eye acts as a dipole in which the anterior pole is positive and the posterior pole is negative.1.Left gaze; the cornea approaches the electrode near the outer canthus resulting in a positive-going change in the potential difference recorded from it. 2.Right gaze; the cornea approaches the electrode near the inner canthus resulting in a positive-going change in the potential difference recorded from it (A, an AC/DC amplifier)
References in periodicals archive ?
Jung, "Online voluntary eye blink detection method using electrooculogram," in Proceedings of the 2012 International Symposium on Nonlinear Theory and Its Applications, pp.
Specifically, the students grew in terms of understanding basic principles of psychophysiology, research content, and skills that were at the heart of the workshops: electrocardiogram, electromyogram, electroencephalogram, and electrooculogram.
Pulse oximetric saturation (SpO2) and waveform bilateral electrooculogram
1] according to the 10-20 international electrode placement system), right and left electrooculogram, chin electromyogram and electrocardiogram.
Electrooculogram (EOG) activity was recorded at the outer canthus and infraorbitally to the left eye.
Electrooculogram activity was also recorded from electrodes located above each eye that were referenced to an electrode at the outer canthus of each eye.
The patient who is being studied for the presence of SAS needs a polysomnogram, which includes coincidental recordings of the electrooculogram, electrocardiogram, electromyogram, and electroencephalogram (Powell, 1997).
A typical polysomnogram montage includes an EEG, electrooculogram, and electromyogram and may include measurement of airflow, respiratory effort, EGG (electrocardiogram), oximetry, and leg movements.
The electrooculogram (EOG), which measures eye movements through electrodes placed on the skin around the eyes and records tiny electric signals that occur when the eyes move.
Electrodes near the eyes can pick up these signals to produce an electrooculogram (EOG).
A vertical electrooculogram (VEOG) and a horizontal electrooculogram (HEOG) were recorded with two pairs of electrodes, one pair (VEOG) placed above and below the right eye, and the other pair (HEOG) at the outer canthus of each eye.