Figure 7.

Lack of the prototypic afterdischarge in an early developmental stage. A, Representative trials of electrical induction of the prototypic afterdischarge on postnatal days 7, 12, 19, and 44. Note that the prototypic afterdischarge appeared in field potential and pyramidal cells after the third postnatal week (P19 and P44; arrowheads). B, Postnatal development of the prototypic afterdischarge in pyramidal cells. *p < 0.05; **p < 0.01. All of the pyramidal cells were recorded through the high-Cl⁻ electrodes for reliable detection of the prototypic afterdischarge (see Fig. 2).