PRANA - Polygraphic Recording Analyzer

The PRANA® software for polysomnography and biosignal processing has powerful computing capabilities and modularity allowing multiple software plug-ins to be executed efficiently.

Various software plug-ins for general and specific purposes are already available:

• the power spectral analysis plug-in
• the spectral coherency analysis plug-in
• the feature extraction plug-in
• the heart rate variability analysis plug-in
• the respiratory rate analysis plug-in
• the event-related waveform analysis plug-in
• the event-related neuro-autonomic analysis plug-in
• the automatic sleep/wake scoring plug-in*

All the software plug-ins can be executed in a single run by using the software plug-in launcher. Additional plug-ins can easily be implemented using the software developer kit.

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Power spectral analysis

The software power spectral analysis plug-in allows the study of human and animal brain functions by measuring EEG powers and frequencies using adjustable settings.

With its graphical interface, this user-friendly and flexible software plug-in features:

• single-run multiple channel processing,
• adjustable settings (window length, overlap, windowing type, maximal frequency, averaging type and length),
• automatic artifact removal using a quality threshold,
• selectable spectral parameter extraction (absolute powers, relative powers, mean frequency and peak frequency),
• default settings for quantitative human EEG,
• user-definable settings.

The software power spectral analysis plug-in of the PRANA® software features state-of-the-art quantitative biosignal time-frequency analysis. Quantitative analysis can be carried out easily and independently of the recording collection system, which allows ensure data from different studies to be compared.

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Spectral coherency analysis

The software spectral coherency analysis plug-in allows studying brain functions by measuring EEG temporal-spectral coupling between different brain areas.

With its graphical interface, this user-friendly and flexible software plug-in features:

• single-run processing of multiple and selectable channel pairs,
• adjustable settings (window length, overlap, windowing type, maximal frequency, averaging type and length),
• automatic artifact removal using a quality threshold,
• selectable coherency parameter extraction (coherence and phase),
• default settings for quantitative human EEG,
• user-definable settings.

Thanks to the software spectral coherency analysis plug-in, the PRANA® software provides an analytical capability with an adjustable temporal resolution of the spectral coupling between biosignals.

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Feature extraction

The software feature extraction plug-in allows for biosignal time-varying analysis by extracting from the signals any mathematically defined features.

With its graphical interface, this user-friendly and flexible software plug-in features:

• single-run processing of selectable set of channels,
• multiple features extraction for each channel,
• adjustable analysis settings (feature selection, signal filtering, window length, averaging type and temporal resolution),
• user-programmable features using simple m-file functions,
• automatic artifact removal using quality threshold,
• saving and loading analysis settings,
• default settings for human EEG, EOG and EMG analysis,
• user-definable settings.

With the PRANA® software feature extraction plug-in, temporal analysis of any biosignals using any mathematical function can be performed. New signal processing features can thus be easily implemented and evaluated by the user.

Software functions for biosignal feature extract: absolute and relative powers; mean and peak frequencies; correlation dimension, spectral, sample, approximate, Shannon and Tsallis entropies; Hjorth activity, complexity and motility; statistical descriptors such as minimum, maximum, sum, difference, mean, median, standard deviation, variance, skewness, kurtosis and slope; wave peak and root-mean-square amplitudes, inflexions and zero-crossings.

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Heart rate variability analysis

The software heart rate variability analysis plug-in allows the study of human and animal autonomous nervous function by detecting heartbeats from any ECG signal and measuring heartbeat intervals variability using standard methods.

With its graphical interface, this user-friendly and flexible software plug-in features:

• ECG channel selection and filtering,
• QRS-complex detection using a validated algorithm,
• adjustable QRS-complex detection settings for any species,
• displaying and editing QRS-complex detection results directly from the ECG traces,
• ectopic heartbeat detection using adjustable settings,
• time-domain and frequency-domain analysis of NN-intervals using adjustable time window and overlap settings and artifact removal,
• default settings for human HRV analysis,
• user-definable settings,
• direct compatibility with various cardio-frequency meters.

With the software heart rate variability analysis plug-in, the PRANA® software allows for high-quality HRV analysis independently of the recording system.

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Respiratory rate analysis

The software respiratory rate analysis plug-in allows the study of human and animal autonomous nervous function by detecting breathing cycles from any respiratory strain, flow or pressure signal and measuring breathing cycles using adjustable settings.

With its graphical interface, this user-friendly and flexible software plug-in features:

• respiratory channel selection and filtering,
• respiratory cycle detection using a validated algorithm,
• adjustable respiratory cycle detection settings,
• displaying and editing respiratory cycle detection results directly from the respiratory traces,
• ectopic respiratory cycle detection using adjustable settings,
• time-domain analysis of respiratory cycles (rate, amplitude and volume) using adjustable time window and artifact removal,
• default settings for human respiration analysis,
• user-definable settings.

The software respiratory rate analysis plug-in together with the PRANA® software allows for high-quality respiratory rate analysis independently of the recording system.

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Event-related waveform analysis

Page under construction, please check back later.

Plug-in available.

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Event-related neuro-autonomic analysis

Page under construction, please check back later.

Plug-in available.

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Automatic sleep/wake scoring*

Page under construction, please check back later.

*Compatible only with specific recording settings. Validity test required.

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PhiTools provides advanced software solutions and services for biosignal processing, sleep analysis, psychophysiological research and clinical trials. PhiTools, software tools and services for psychophysiology, polysmonography and chronobiology.