Fibers & Receptors
| Fiber type | Myelin | Speed | Main function |
| Aα | Heavy | Fastest | Motor + proprioception |
| Aβ | Heavy | Fast | Fine touch, vibration |
| Aγ | Heavy | Fast | Muscle spindle control |
| Aδ | Heavy | Medium-fast | Sharp pain, cold |
| B | Light | Medium | Autonomic preganglionic |
| C | None | Slow | Dull pain, itch, warmth |
Receptors
