BIOPAC® Systems, Inc. Logo

EOG vs. EMG amplifier

The EOG100C amplifier can record from DC to 100 Hz and is designed to measure a signal correlated with the corneal-retinal potential (the small electrical potential difference between the cornea and the retina which probably results from the higher metabolic rate of retinal tissue).  EOG is useful for recording eye movements.  With electrodes placed around the eyes, the recorded signal will vary with eye position as the cornea moves closer to one electrode and farther from the other (as the retina does the opposite).  The corneal-retinal potential does not vary with eye position, but the extent to which the electrodes experience the effects of that potential vary with eye position.

The EMG100C amplifier can record from 1 Hz to 5000 Hz and is designed to measure muscle biopotential signals. It is intended for higher frequency measurements and cannot be used to record DC potentials.

Although the amplifiers are designed to pick up different signals, the EOG100C can pick up some EMG activity (whatever part of the signal is under 100 Hz) and the EMG100C can pick up some EOG activity (but the acquired signal will be different because the unit cannot record the lowest frequencies that the EOG100C records even when the latter is high pass filtered).

Page last modified 24Dec2014

Spotlight On
free BIOPAC webinar

Fundamentals of Electrical Stimulation

Learn the Fundamentals of Electrical Stimulation with BIOPAC experts Tim Cook and David Pollack!

What You Will Learn:
– The differences between types of electrical stimulation
– Use cases for electrical stim
– How to prep subjects and connect them to stimulator safely
– Best practices for safe stimulation
– Live demos of electrical and haptic stimulators

Register Now
Latest News

New Citations | Keeping Students Attentive in an Online Setting & More!

BIOPAC provides software and hardware that allows research teams to record and analyze numerous body signals for physiological experimentation. Here are a few notable studies using BIOPAC equipment for ECG, EDA, and Respiration data. What Keeps Students More Engaged? The question has been brought to the forefront during COVID, what variations of online learning keep students more engaged? […]

Electrocardiography Guide Now Available

BIOPAC’s comprehensive Introductory ECG Guide addresses fundamental to advanced concerns to optimize electrocardiography data recording and analysis. Topics include: ECG Complex; Electrical and Mechanical Sequence of a Heartbeat; Systole and Diastole; Configurations for Lead I, Lead II, Lead III, 6-lead ECG, 12-lead ECG, precordial leads; Ventricular Late Potentials (VLPs); ECG Measurement Tools; Automated Analysis Routines for extracting, […]

Read All
Request a Demonstration
Request a Demonstration