TABLE 1.Parameters of unitary EPSPs
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| Pair No. |
Amplitude [Base to Peak] (mV) |
Time to Peak [Onset to Peak*] (ms) |
Time to Peak [AP to Peak†] (ms) |
10-90% Rise Time (ms) |
Half Duration (ms) |
Failure Rate (%) |
| 1 (n = 9) | ||||||
| Mean | 1.74 | 3.72 | 5.89 | 2.90 | 17.07 | 59.1 |
| SE | 0.52 | 1.51 | 1.50 | 1.13 | 21.87 | |
| 2 (n = 10) | ||||||
| Mean | 2.20 | 3.68 | 5.53 | 2.53 | 14.90 | 68.8 |
| SE | 1.11 | 1.18 | 1.59 | 0.74 | 9.69 | |
| 3 (n = 10) | ||||||
| Mean | 1.90 | 4.10 | 5.59 | 2.77 | 12.91 | 52.6 |
| SE | 0.40 | 1.80 | 0.89 | 0.79 | 16.09 | |
| 4 (n = 7) | ||||||
| Mean | 1.73 | 5.58 | 6.43 | 3.39 | 14.22 | 78.0 |
| SE | 0.80 | 2.41 | 2.69 | 1.22 | 15.94 | |
| 5 (n = 11) | ||||||
| Mean | 1.76 | 4.35 | 5.86 | 2.31 | 19.00 | 61.5 |
| SE | 0.65 | 1.37 | 1.94 | 0.39 | 14.20 | |
| 6 (n = 8) | ||||||
| Mean | 2.17 | 3.22 | 5.04 | 2.07 | 11.33 | 71.4 |
| SE |
0.40 |
1.56 |
2.00 |
0.79 |
10.75 |
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Values are listed as mean ± SE and n = sample size. Characteristics of unitary excitatory postsynaptic potentials (EPSPs) from 6 pairs of monosynaptic connections between granule cells of rats with mossy fiber sprouting. Means are from 7 to 13 consecutive EPSPs that were evoked by presynaptic action potentials triggered at 1 Hz. Presynaptic action potentials were evoked by fixed amplitude current pulses at 1 Hz. Failures are excluded. Time to peak was measured from the end of the capacitative artifact of the presynaptic action potential to the peak of the unitary event (*) or from the peak of the presynaptic action potential to the peak of the unitary EPSP (†). For definitions of amplitude, rise-time and half-duration, see METHODS.