Table 1.
Estimates of conduction times
| Subject | Site | Collision interval (msec) | Refractory period (msec) | Conduction time (msec) |
|---|---|---|---|---|
| F17 | 1 | 2.5 | 0.9 (A), 0.8 (P) | 1.6–1.7 |
| 3 | 4.4 | 0.9 (A) | 3.5 | |
| 4 | 2.0 | 0.9 (P) | 1.1 | |
| 5 | 2.6 | 0.9 (A) | 1.7 | |
| 6 (PA) | 5.0 | 0.9 (A) | 4.1 | |
| 7 | 2.7 | 0.9 (A) | 1.8 | |
| F11 | 4 | 2.9 | 0.7 (A), 0.7 (P) | 2.2 |
| F9 | 7 | 7.2 | 1.0 (A) | 6.2 |
| 8 | 7.3 | 1.0 (A) | 6.3 | |
| 9 (AP) | 4.9 | 0.7 (P) | 4.2 | |
| 9 (PA) | 5.2 | 1.0 (A) | 4.2 | |
| F18 | 0 | 4.0 | 0.7 (A) | 3.3 |
| 1 | 3.6 | 0.7 (A) | 2.9 | |
| 2 | 4.0 | 0.7 (A) | 3.3 | |
| 4 | 6.2 | 0.8 (A) | 5.4 | |
| 7 | 1.5 | 0.8 (A) | 0.7 | |
| 8 | 1.8 | 0.8 (A), 0.9 (P) | 0.9–1.0 | |
| F12 | 10 | 6.9 | 0.9 (A) | 6.0 |
Conduction time estimates for sites at which collision-like effects were observed and at which refractory periods were measured. Conduction time estimates were obtained by subtracting the C–T interval corresponding to 25% recovery from refractoriness from the C–T interval corresponding to 25% recovery from collision block. For asymmetrical collision curves, the curve used (AP or PA) in the calculations is indicated in parentheses. For refractory periods, letters in parentheses (A or P) refer to the stimulation site (anterior or posterior) at which the refractory period was measured.