Diagram of the method used to compare A-waves. This is a diagram of the method used to compare: 1) the response to the second stimulus in paired-stimuli, and 2) the deconvolved response from QSD at the same SI. The goal is to determine the waveform at the start of a stimulus train, compared with the asymptotic response in the middle of the train. To make the comparison, the mean period in the QSD sequence is the same as the time between the two stimuli in the pair.
A: The response to a pair of stimuli, where the response to the second stimulus of the pair is different from the response to the first stimulus.
B: The response to a single stimulus.
C: B subtracted from A gives just the response to just the second stimulus.
D: C is moved to the left so as to ease the comparison with A. Note the time-scale has moved, but the time of stimulation for this response is now at the beginning of the sweep, as it is in B.
E: The response to a single stimulus in a continuous stimulation at a repetition-rate with a period the same as in A. This waveform was deconvolved by QSD from overlapped data.