Patent
Nystagmus processor for EEG machines
TLDR
In this article, a pair of active probes and a datum probe are affixed to the patient, and the active probes' signals are coupled to a preamplifier involving both common mode rejection and differential amplification.Abstract:
A pair of active probes and a datum probe are affixedto the patient, and the active probes' signals are coupled to a preamplifier involving both common mode rejection and differential amplification. The information bearing voltage levels are coupled to a voltage controlled oscillator, the output of which bears information in the form of frequency variations. A photocoupler isolates the patient from unwanted feedback, and drives a phase locked loop which demodulates the signal back to an information bearing voltage. The derivative of the voltage signal is taken, is separated by polarity to correspond to the direction of eye motion, and is coupled to the EEG, thereby representing nystagmus velocity.read more
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Patent
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Glaucoma testing from observations of optokinetic nystagmus
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References
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Journal ArticleDOI
A simplified circuit for stimulus artifact suppression
Robert J Roby,Ettore Lettich +1 more
TL;DR: This note describes a simple electronic method of eliminating time-locked stimulus artifacts from recordings of cerebral evoked potentials using a 16-channel battery-powered suppressor system.
Patent
System for the measurement, display and instrumental conditioning of electromyographic signals
TL;DR: In this paper, a plurality of electrical contacts are applied to human beings to detect muscle (i.e., electromyographic, or E.M.G.) activity at various points of the body.
Patent
Method of and apparatus for sleep monitoring by brainwave, electromyographic and eye movement signals
H Hakata,K Higuchi,M Kozeni +2 more
TL;DR: In this article, an analog-to-digital signal conversion device for electroencephalograms, movements of the eyes and electromyograms, a data processor for processing the output signals from the conversion device and a tape recorder for recording the signals indicative of the EEG, the eye movements and the EMYograms, is presented.
Patent
Biological signals monitor
TL;DR: In this article, a digital phase lock loop for generating fetal heart rate signals related to the loop frequency is presented. But this loop is only used for estimating the rate during occurrences of blank spaces caused by removal of signals representing merged maternal and fetal heart beats and counter controlled means for disabling readout.
Patent
System and method for monitoring physiological parameters
Jose R. Silva,John M. Narrace +1 more
TL;DR: In this paper, a method and apparatus for generating a continuous audible indication of a physiological parameter such as human skin resistivity and the like, suitable either for comparison with a preselected calibration value or for correlation with a functionally related other physiological parameter.