EEG data acquisition and preprocessing by microcomputer satellite system.
Recent development in computer technology allows already medium scale EEG data processing to be performed within the clinical neurophysiology department, if a fast minicomputer with adequate mass storage and graphical output facilities is used. Data acquisition, however, should be delegated to a microcomputer which also should take over as much preprocessing as possible. A system is presented, where one or several microcomputer-based satellite units perform analog-digital conversion, Fourier transformation (FFT), calculation of power spectra and crossproducts, as well as event related averaging or other preprocessing procedures. The units are connected to a fast central minicomputer, where a supervisor program loads the microprocessors with their programs, supervises their activity, receives preprocessed data and activates appropriate postprocessing programs to produce the final results.
D000703:Analog-Digital Conversion; D003201:Computers; D004569:Electroencephalography / Q000295:instrumentation*; D005583:Fourier Analysis; D006801:Humans; D008433:Mathematics; D008838:Microcomputers; D008905:Minicomputers