Models #2a, 2b: Compound EPSPs, intrinsically controlled burst offset
Although models #1a and 1b were able to closely approximate the hypothesized coding constraints of the granular cell’s production of bursts containing varying numbers of spikes as a function of input delay, the use of an arbitrarily controlled, LMI delivered IPSP to maintain constant post-EOCD burst offset times was included only to maximize the fit to experimental granular cell responses and the theoretical burst duration code. The precise role of shunting inhibition from the LMI cell onto the granular cell soma at the level of single afferent excitation is unknown in vivo, and therefore a model was created to maintain the desired granular cell response properties under the paradigm of an intrinsically controlled burst offset.