Electroencephalograms Module
Home Products Biomedical Instrumentation Electroencephalograms Module
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The VPL-BIO-EEG module is a versatile instrument which is specially designed to perform laboratory experiments and
demonstration of EEG. The module is useful for measuring psycho-physiological stimuli, for recording physical disorders
and for observing a wide range of physical events. It is possible to measures variety of waves produced over the entire surface of the head. Typical waves which can be measured are alplha,
theta waves. The system uses various basic instrumentation and monitoring circuits which can be very easily understood by the students. The user can analyze the signals at different sections of circuitry using oscilloscope or PC recorder.
Features
has differential Amplifier:
Common Mode Rejection Ratio (CMRR) : 80 dB
Gain : 120 dB
Sensitivity to 5 mV
Frequency Response : DC to approximately 1 KHz
For protection against line power,safety devices has been incorporated which limits the input voltage.
Control Switches for varying roll off frequencies and amplifier gain
Optocoupler isolates the front end amplifier and reference ground from earth ground circuitry
Selectable notch filter which allows 50Hz/60Hz filtering.
Isolated Power Supplies to isolate the front end amplifier from
the common earth ground supply (provides an additional margin of safety)
Polarity Correction Circuitry enables the R wave to be either positive or negative; the output is always a positive signal
Pulse Stretching Circuit uses the R wave as the signal and converts it into a rectangular pulse
Tone Generator produces the tone whose on period is controlled by the Pulse Stretcher Circuit
Converts the pulse stretched signal into a DC level for the 1 mA meter
Band pass filter to provide signals in range of 8-14 Hz.
Calibration 1mV facility
Various instrumentation circuits can be individually tested which are fully explained in laboratory manual like Differential Amplifier, Opto Electronic components, Notch filters etc.
Module Capability
To record waves at different position of head like temporal, frontal, parietal, occipital.
Effect of eyes movement on brain waves like open, close, blinking.
Can record alpha waves by using selectable bandpass filter 8-14 Hz.
Effect of frustration thoughts on brain waves
Can record theta waves by disabling bandpass filter.
Effect of loud noise, physical touch, odors, bright lights and other activities on brain waves
Many more capabilities
Equipments Supplied
EEG electrodes
Laboratory manual
Biomedical disposal Accessories Package
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