Table 1.
Frequency of cholinergic, GABAergic, and noncholinergic/non-GABAergic cells with different anatomical and physiological characteristicsa
| All cells | Nb+/VAChT+ | Nb+/GAD+ | Nb+/VAChT−/GAD− | χ2 statistic (df) | |
|---|---|---|---|---|---|
| Total | 73 | 11 | 29 | 33 | |
| Anatomy | |||||
| Area | 7.58 (4) | ||||
| LDT | 28 | 7 | 7 | 14 | |
| SubLDT | 25 | 3 | 10 | 12 | |
| MPPT | 20 | 1 | 12 | 7 | |
| Shapeb | 6.76 (2)* | ||||
| Round-oval-fusiform | 36 | 2 | 18 | 16 | |
| Polygonal | 33 | 9 | 10 | 14 | |
| Sizeb | 7.03 (2)* | ||||
| Small (≤15 μm) | 24 | 0 | 12 | 12 | |
| Medium-large (>15 μm) | 45 | 11 | 16 | 18 | |
| Physiology | |||||
| Frequency (stimulation)c | 5.35 (6) | ||||
| Fast (>14.5 Hz) | 12 | 1 | 6 | 5 | |
| Slow (<14.5 Hz) | 50 | 10 | 19 | 21 | |
| Very slow (<0.25 Hz) | 6 | 0 | 3 | 3 | |
| Silent (0 Hz) | 5 | 0 | 1 | 4 | |
| Firing type (stimulation)d | 3.27 (4) | ||||
| Tonic regular | 29 | 6 | 11 | 12 | |
| Tonic irregular | 22 | 5 | 9 | 8 | |
| Phasic cluster | 12 | 0 | 6 | 6 | |
| Phasic burst | 0 | 0 | 0 | 0 | |
| Response to stimulation | |||||
| Increase (On) | 41 | 11 | 14 | 16 | 10.14 (4)* |
| Decrease (Off ) | 23 | 0 | 11 | 12 | |
| No change (No) | 9 | 0 | 4 | 5 |
aFrequency (number of cells) for the three groups are presented and compared, using the likelihood ratio χ2 statistic; *p < 0.05; **p < 0.01; ***p < 0.001.
bShape and size (long axis) of whole cell bodies only (n = 69).
cAccording to instantaneous firing frequency calculated from interspike interval modal value during stimulation.
dIncluding cells with discharge rates >0.25 Hz (n = 63).