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 ASA features 
 ASA comes as a modular program with many options to choose. Please contact us to discuss the optimal combination of modules for your partical purpose. 
 
Features: Data Import and Review
 
 
  • EEG/MEG import of all major formats as supplied by the manufacturer. Review capabilites, free adjustment of sensitivity, color, filters per channel or group of channels for each modality. Paging, scrolling, automatic paging, navigation to event markers, different editable montages, compressed display of long recordings. Video review.
  • Full support of annotations, triggers, spike/seizure events and others, navigation through events, export of event information and data around events
 
  • Versatile and highly interactive 3D mapping of EEG/MEG in time and frequency domain, completelt synchonized with data, scalable, zoomable. Color tables, display mode and transparency can be changed freely. Interpolation over a time window (smoothing), simultaneous display of different data or time steps or frequency bands.
  • MRI and fMRI import (DICOM 3, Analyze, ASA) and review with free rotation and navigation of the 3D image data. Overlay with maps/cortical maps/LORETA results. Highly interactive display with zoom and mouse-rotate functions.
 
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Features: Signal processing
 
 
  • Filtering, artefact detection and correction methods, baseline correction, detrending, data template substraction for correction of repetitive artefacts, averaging and grand averaging
  • FFT/Coherence/Wavelet transform on continuous and event-related data, hilbert transform, ERD/ERS on scalp EEG, MEG, and cortical current densities, mapping tools for these
  • Resampling, concatenation and other data handling methods
 
  • Export of data into a variety of pub;ic and proprietary formats, e.g. ASCII and EDF
  • Scripting interfaces for direct interaction and data exchange with Matlab, MS-Excel and other applications
  • EOG artefact correction based on blind source separation technique (SOBI)
 
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Features: Source Reconstruction and Modeling
 
 
  • Multiple spatio-temporal dipole models for EEG/MEG
  • ERD/ERS and cortical ERD/ERS
  • MUSIC (multiple signal classification)
 
  • LORETA (low resolution tomographic analysis) on regular and cortical source space
  • Cortical imaging (cortical current density mapping)
  • All methods apply the boundary element method and individually shaped realistic head models. Models are created in ASA from the 3D MR or CT images of the subject. Alternatively, a variety of different standard head models is supplied with the ASA installation.
 
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Features: EEG/ERP Recording and Online Analysis
 
 
  • EEG data acquisition with various amplifiers, ranging from 8 - 256 channels using optical cable or wireless BlueTooth data transmssion
  • ERP data acquisition, using external triggering (e.g. applying eevoke) or internal built-in stimulation functions for AEP, VEP, and P300 paradigms
  • Adjustable artefact cancellation for the recording of EEG with electrical or transcranial magnetic stimulation
  • Full control of recording parameters (set-up and sampling rate, bipolar/auxiliary channel definition and others) and montage for recording and online display
  • Open data format (C and Matlab code for interfacing available) with data compression during the recording, 32 bit format
 
  • Synchronized video recording with various camera models (PAL resolution or below, analog and digital cameras supported) and video review, pruning of EEG/video ouput to save disk space
  • Remote start of external eevoke stimulation via PC network to automate ERP recording
  • Online averaging, trigger statistics, spectral analysis and mapping
  • Online data access for neur-feedback application, Matlab link
 
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