Template:Sensory Nerve Fibres: Difference between revisions
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| Aα || Yes || 13-20 || 80-120 || Proprioception, muscle spindle primary endings (Ia), golgi tendon organs (Ib) (and alpha motor neurons) || Yes ([[Nerve Conduction Studies|H reflex]]) || No | | Aα || Yes || 13-20 || 80-120 || Proprioception, muscle spindle primary endings (Ia), golgi tendon organs (Ib) (and alpha motor neurons) || Yes ([[Nerve Conduction Studies|H reflex]]) || No | ||
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| Aβ || Yes || 6-12 || 33-75 || Discriminative mechanoreception (touch, vibration), proprioception || Yes ([[Nerve Conduction Studies|sensory nerve conduction]]) || Yes | | Aβ || Yes || 6-12 || 33-75 || Discriminative mechanoreception (touch, vibration), proprioception, pain modulation (block nociceptive information, allodynia in sensitisation) || Yes ([[Nerve Conduction Studies|sensory nerve conduction]]) || Yes | ||
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| Aγ || Yes || 4-8 || 15-40 || Touch, pressure (and gamma motor neurons) || || No | | Aγ || Yes || 4-8 || 15-40 || Touch, pressure (and gamma motor neurons) || || No | ||
Revision as of 19:43, 3 September 2021
- Characteristics of sensory nerve fibres
| Nerve fibre | Myelinated axons | Diameter (µm) | Conduction velocity (m/s) | Sensory information | Usefulness of electroneuromyography | Usefulness of QST |
|---|---|---|---|---|---|---|
| Aα | Yes | 13-20 | 80-120 | Proprioception, muscle spindle primary endings (Ia), golgi tendon organs (Ib) (and alpha motor neurons) | Yes (H reflex) | No |
| Aβ | Yes | 6-12 | 33-75 | Discriminative mechanoreception (touch, vibration), proprioception, pain modulation (block nociceptive information, allodynia in sensitisation) | Yes (sensory nerve conduction) | Yes |
| Aγ | Yes | 4-8 | 15-40 | Touch, pressure (and gamma motor neurons) | No | |
| Aδ | Thin | 1-5 | 3-30 | "rapid" pain, crude touch, pressure, temperature. AMH type I for rapid mechanical pain (high heat threshold >53C), AMH type II for rapid heat pain (lower heat threshold 43-47C). | No | Yes |
| C | No | 0.3-1.5 | 0.5-2.0 | "slow" pain, touch, pressure temperature (and postganglionic autonomic). Polymodal. | No | Yes |
