This window provides all channels and all digital triggers from the recorded file. The mean is calculated from all recorded and selected data pieces, not only from a circular buffer. The units used in this window are all physical units. Use therefore the calibration values in the instruments to define the equivalent to 1V to a physical unit, e.g. 1V = 100N. Press New Selection to return to the selection of digital triggers and signal pieces. This is useful if you want to process one trigger condition after each other with slightly different cursor positions. This can be done without leaving the online processing. Press Refresh to re-calculate the reflex sizes and delays. Especially when moving the cursors this might be necessary. After pressing Save+Repeat or Save+Exit a file selection box appears and you can choose a name to write text files with all relevant information for further examinations with Excel. The file extension will be defined automatically and represents the digital trigger number. Choosing Save+Repeat will not exit the processing window so that you have the possibility to do some changes and once more save the result without leaving the window. On the left side of the window you see all selected signal pieces. These signals are used as the basis for the processing. Select Rectified and a filter if necessary. Amp. per channel [V] defines the Y-scale zoom of the window. It has no influence on the offset of the signals. H-Reflex The H-Reflex tab is programmed especially for the Hoffmann reflex measurement. It needs the stimulus current as an analog channel to plot the reflex size against the stimulus current. Since the current impulse is normally 1ms or smaller, an electric circuit is necessary to hold the amplitude of the stimulus for some milliseconds to get a precies current measurement. Check the stimulus current channel and the cursor positions in the summation window. If the cursor position is changed, press Refresh to get the new results. All selections can be stored in a file. Press Save Setup to store the file and Load Setup to re-load it. The filename of the stored file can be combined with the setting which is stored in IMAGO Record. After the selection and saving the setup in the online processing window, go back to IMAGO Record and save the complete setting with the reference to the online processing file. With the activation of Append Graphs each new selection of channel or trigger will be added to the existing plot in the Summation window. This function can be used to show differences between two different trigger conditions in the same window. PSTH while recording The PSTH function has a speciality while recording. It can either show the plot of the rotating buffer in the lower half of the screen or it can show the complete signal of the selected channel to have a good feedback on the EMG activity. PSTH freq [Hz] shows the frequency measured in the continuous time signal with amplitudes which are above the PSTH level. The PSTH diagram is not only generated from the signal pieces of the rotating buffer. Each new signal piece is processed and adds to the histogram. The additional button Clear can be used to clear the internal PSTH buffer. PSTH The PSTH (Post Stimulus Time Histogram) mode is the second feature set of the window. It generates a histogram of all EMG activity which is higher than the defined PSTH level. The unit of the PSTH level is in the physical unit of the selected channel. Choose the PSTH bins [ms] to define the X-axis resolution of the histogram. PSTH refractory time [ms] defines the time after a valid entry to the histogram a new entry is disabled. This can be used to prevent more than one entry to the histogram coming from a single shot. # hits shows how many signals have added minimum one entry to the histogram.