EEG: Electroencephalography

Modular construction...extreme flexibility

MP systems offer features to support nearly every physiological recording scenario. The following advanced features apply to the application you selected.

If you don't see an Advanced Feature that interests you, please contact BIOPAC so we can identify the best solution for your particular need.

Amplitude Histogram

Create an amplitude histogram to highlight changes within the EEG recording. Use this powerful feature to compare baselines on pre- and post-protocol data. View multiple histograms within the same graph window for easy visual comparisons of skewness and kurtosis. The degree of deviation from Gaussian distribution of the EEG has been shown to depend on […]

Automated EEG Analysis

AcqKnowledge includes a number of fully automated EEG analysis functions. Compute Approximate Entropy Approximate entropy is a statistical measure that attempts to quantify the predictability of a data sequence. A perfectly predictable data series (such as a pure sine wave) has an approximate entropy of zero. Several studies are beginning to examine approximate entropy of […]

Cross- and Auto-correlation

To correlate one channel of EEG data with another, use the off-line correlation function in AcqKnowledge. To obtain the auto-correlation of a signal, correlate a channel with itself. To obtain the power spectral density, perform the FFT on the auto-correlation result.

Dividing EEG Into Specific Epochs

Use the display scrolling controls to adjust the rate at which data is scrolled across the screen. For example, set the horizontal axis to sweep exactly 30 seconds of data across the screen. This mode is very useful when scoring sleep studies in 30-second epochs.

EEG Frequency Bands

 

EEG Remove EOG Noise

The EEG frequency analysis provides a fully automated, epoch driven, analysis of the EEG signal. Automatically remove eye blink artifacts from the EEG signal with the EOG removal utility. The analysis uses an independent component analysis technique to separate the EOG signal from the EEG waveform.

Event-Related Potentials (ERP) Analysis

Present a variety of visual and auditory stimuli on one computer while AcqKnowledge records the stimuli event markers and psychological responses on another computer. As the stimuli are presented, the STP100W simultaneously (with 1ms resolution) sends trigger signals to the MP System for data synchronization and collection. The STP100W software (SuperLab) can be used to change […]

Evoked Responses

Record and analyze auditory, visual and somatosensory evoked responses. The on-line averaging function allows the user to perform detailed evoked response studies. Average physiological evoked responses in synchronization with stimulus presentation. Remove background noise and extract the signal of interest with the on-line signal-averaging mode. The system can trigger a stimulator at the start of each […]

Field Potential Measurements

To perform field potential measurements, position electrodes around the isolated tissue or organ and use the MCE100C to record the potential. Each MCE100C can record a single differential potential. Multiple MCE100C amplifiers can be configured for unipolar (common reference) or bipolar (multiple reference) recordings. Up to 16 channels of field potential data can be collected simultaneously. […]

Real-time EEG Filtering

Record single- or multi-channel montages with on-line calculation channels for Delta, Theta, Alpha, and Beta wave activity. On-line calculation channels allow the display of raw and filtered data in real time, and users can employ a variety of other transformations to filter the data off-line and further analyze the data. af_filt_eeg.gif