Membrane excitability
| Mode | EPs or LCs | Physiology |
| A | 1 sEP | Nonexcitable mode |
| B | 1 sEP, 2 uEP | Single action potential mode |
| C | 1 sEP, 2 uEP, sLC | Bistable mode with a stable firing and a quiescent state |
| D | 1 uEP, sLC | Stable firing mode |
| E | 1 sEP, sLC, uLC | Bistable mode with a stable firing and a quiescent state in depolarized potential |
| F | 1 sEP | Nonexcitable mode with damped oscillation |
| Mode | EPs or LCs | Physiology |
| A | 1 sEP | Nonexcitable mode |
| B | 1 sEP, 2 uEP | Single action potential mode |
| C | 1 sEP, 2 uEP, sLC | Bistable mode with a stable firing and a quiescent state |
| D | 1 uEP, sLC | Stable firing mode |
| E | 1 sEP, sLC, uLC | Bistable mode with a stable firing and a quiescent state in depolarized potential |
| F | 1 sEP | Nonexcitable mode with damped oscillation |
sEP, stable EP; uEP, unstable EP; sLC, stable LC; uLC, unstable LC.