A Technique for Time-Ordered Display of Temporal Patterns of Evoked Neuronal Unit Activity

A technique for photographing the ensemble effects of a series of evoked neuronal unit responses is described. The use of a counting register and a digital-to-analog converter to step the sweep after each stimulus obviates the need for a moving-film type of camera. Pattern height remains constant for any preselected number of sweeps, and for changes in stimulus frequency as well. Provision is also included for presentation of unit discharges in dot form or unit slow-wave activity in analog form.