p591fig16.22 Time constants and duration of afterhyperpolarization currents of grid cells increase along the dorsoventral gradient of the MEC.<BR>||  Dorsoventral gradient in afterhyperpolarization (AHP) kinetics of MEC layer II stellate cells (Navratilova etal 2012).  [mAHP time constant (ms), Half-width (mm)] vs distance from the dorsal surface (mm), at [-55, -50, -45] mV.  Time constants and duration of AHP increase from the dorsal to the ventral end of MEC layer II.  Effectively, the relative refractory period is longer for ventral stellate cells in MEC layer II.