Table 1.
Electrophysiological properties of V1 excitatory neurons
| L2/3 | L4 | L5a | L5b | L6 | |
|---|---|---|---|---|---|
| AP threshold (mV) | –40 ± 3.4 | –36 ± 3 | –36.2 ± 5.9 | –36.9 ± 5.6 | –31 ± 1.7 |
| AP ht (mV) | 73.8 ± 3.1 | 68 ± 1.8 | 78.9 ± 3.3 | 72.9 ± 3.3 | 66.6 ± 3.4 |
| AP hw (ms) | 2.9 ± 0.2 | 2.3 ± 0.1 | 2.2 ± 0.3 | 2.8 ± 0.5 | 2.1 ± 0.2 |
| AHP (mV) | 11.3 ± 0.9 | 11.1 ± 1 | 10.3 ± 2.1 | 12.1 ± 1.7 | 11.4 ± 1 |
| AHP time (ms) | 27.1 ± 2.8 | 22.4 ± 1.8 | 30 ± 0.01 | 26.7 ± 2.7 | 15.8 ± 2.5 |
| AP rise time (ms) | 1.2 ± 0.2 | 1 ± 0.04 | 0.9 ± 0.1 | 1 ± 0.1 | 1.1 ± 0.1 |
| AP fall time (ms) | 5.2 ± 0.4 | 4 ± 0.2 | 4.9 ± 0.7 | 5.4 ± 1 | 3.4 ± 0.3 |
| Initial ISI (s) | 0.04 ± 0.02 | 0.02 ± 0.004 | 0.04 ± 0.01 | 0.03 ± 0.001 | 0.03 ± 0.004 |
| Spike rate (Hz) | 15 ± 1.1 | 23 ± 1.8 | 19.2 ± 3 | 26.5 ± 10 | 22.1 ± 1.8 |
| Spike adaptation index | 4 ± 0.4 | 4 ± 0.3 | 4.6 ± 1 | 4.2 ± 0.4 | 3. 7 ± 0.6 |
The intrinsic physiological characteristics of individual pyramidal neurons recorded across V1 layers were quantitatively measured and grouped according to laminar location (L2/3–L6). Included in the measurements are action potential (AP) threshold, height (ht), half‐width (hw), after hyperpolarization potential (AHP) and duration (AHP time), AP rise and fall time, the initial interspike interval (ISI) and spike rate at 200 pA of somatic current injection (Hz), and spike adaptation index. Data are presented as the mean ± SE.