Methods do not exist for the rapid, quantitative analysis of complex phasic patterns such as are seen on records of intraluminal gastrointestinal pressure or other parameters of motility. In an attempt to develop a more satisfactory method, these wave forms have been converted into digital form and then analyzed by the Whirlwind I digital computer at M.I.T. Generation of the autocorrelation function and the power density spectrum of these records has permitted a numerical, quantitative expression of certain information contained in these curves.
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John T. Farrar (1960) studied this question.