Table 1.
Summary of results from Type 2 units recorded, including 2 Aδ units
| Unit ID | Subject age/sex | Unit type | CV (m s−1) | 2 Hz (%) | RF | MT (mN) | CT (°C) | HT (°C) | Lat/spike | Menth sens (c/h) | Menth conc (%) | Delay activ (min) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L2a | 46M | 2 | 0.96 | 6.9 | ss | X | — | — | L/S | — | 50 | 5.6 |
| L2b | 46M | 2 | 0.91 | 4.5 | ss | X | — | — | L | — | 50 | 5.8 |
| L1b | 46M | 2 | 1.31 | 5.1 | ss | X | — | — | L/S | — | 50 | 25.0 |
| C1b | 22M | 2 | 1.50 | 5.7 | ss | X | 30.0 | 36.0 | L | — | 30 | 12.0 |
| N1 | 37F | 2 | 1.50 | — | ss | X | 31.8 | 37.0 | S | y/y | 30 | 3.0 |
| J3 | 22M | 2 | 1.11 | 3.9 | ss | X | 28.5 | 43.0 | S | y/y | 30 | 9.6 |
| D3 | 28M | 2 | 1.1 | 4.2 | ss | X | 29.8 | X | S | y/y | 40 | 1.0 |
| O1 | 24M | 2 | 0.86 | 5.6 | ss | X | 31.0 | 40.6 | S | — | 40 | 9.5 |
| O3 | 24M | 2 | 0.83 | 4.9 | ss | X | 30.1 | 34.4 | S | y/y | 40 | 6.8 |
| I2 | 25F | 2 | 1.01 | 5.8 | ss | X | 35.7 | 41.8 | S | y/y | 40 | 4.1 |
| K2 | 33F | 2 | 0.94 | 3.5 | ss | X | 29.3 | 35.0 | S | — | 40 | X |
| L3 | 48M | 2 | 0.71 | 6.6 | ss | X | 30.0 | 34.0 | L/S | — | 2 | 2.8 |
| J4 | 24M | 2 | 0.92 | 4.8 | ss | X | 29.8 | X | S | y/y | 2 | 6.9 |
| B2 | 27M | 2 | 0.99 | 3.2 | ss | X | — | >43.0 | L/S | — | 2 | 6.8 |
| R1 | 24F | 2 | 0.96 | — | ss | X | 38.1 | 39.5 | S | — | — | — |
| O2 | 24M | 2 | 0.97 | 3.4 | ss | X | 29.9 | 37.5 | S | — | — | — |
| F2b | 18M | 2 | — | — | ss | X | 33.0 | 33.0 | S | — | — | — |
| P1 | 20F | 2 | 1.07 | 3.7 | ss | X | 29.9 | 37.6 | S | — | — | — |
| Q1 | 52M | 2 (Aδ) | 3.80 | 8.4 | ss | X | 31.9 | X | L/S | y/n | 40 | 2.8 |
| J1b | 22M | 2 (Aδ) | 4.40 | 5.2 | ss | X | — | — | L | — | 40 | 17.0 |
Unit ID: letters refer to subjects, numbers designate recording session and small letters represent different fibres. 2 Hz (%), percentage slowing during a 3 min 2 Hz stimulation; RF, receptive field; ss, single spot; MT, mechanical threshold; HT, heat threshold; CT, cold threshold; Lat/spike indicates whether menthol-induced activity was monitored by recording latency to electrical stimulus (L) and/or by counting spontaneous spikes (S); Menth sens, sensitized by menthol; c, to cold; h, to heat; Menthol conc, menthol concentration; Delay activ, delay to discharge following application of menthol; X, no response; ‘–’, not tested or not testable.