Figure 6. Recovery of EPSC amplitudes from depression is slow and monoexponential.
A, Vestibular afferents were stimulated with conditioning trains of 20 pulses at 10, 50, or 100 Hz, followed by a test pulse at a variable time afterwards. B, Recovery from depression was best fit with a single exponential. The tau of recovery was similar across the three conditioning frequencies of 10, 50, and 100 Hz (2.2, 2.5, and 1.9 s respectively; n = 5). C, EPSCs did not recover in amplitude during shorter intervals (10–100 ms, all tested with 50 Hz conditioning train). Application of 100 µM EGTA-AM for 5 min had no effect on recovery (n = 4). D, EGTA-AM had no effect on the timecourse of recovery for longer test intervals (conditioning train, 50 Hz; n = 7).