Table 1.
Synaptic parameters
| τrec (ms) | τfac (ms) | E | U | |||||
|---|---|---|---|---|---|---|---|---|
| Fit | Model | Fit | Model | Fit | Model | Fit | Model | |
| F | 86 ± 16 | 85 | 1171 ± 94 | 1200 | 3.0 ± 0.3 | 3 | 0.36 ± 0.05 | 0.35 |
| FD | 163 ± 25 | 160 | 910 ± 38 | 900 | 2.6 ± 0.2 | 3 | 0.24 ± 0.02 | 0.25 |
| D | 148 ± 18 | 150 | n/a | n/a | 4.5 ± 0.3 | 5 | 0.80 ± 0.02 | 0.8 |
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The mean ± SE synaptic parameters obtained from fits (left columns) to recorded cortical responses during lateral olfactory tract stimulation for facilitation-dominant (F), facilitating-depressing (FD), and depression-dominant (D) synapses. The corresponding values used to model M/T population synaptic currents are also listed (right columns). E, Total synaptic efficacy; τfac, time constant for facilitation; τrec, time constant for recovery from depression; and U, the utilization of efficacy on a single pulse at rest (fully recovered and nonfacilitated).