Template:Sensory Nerve Fibres: Difference between revisions
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;Characteristics of | ;Characteristics of peripheral nerve fibres | ||
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! | ! Nerve fibre !! Myelinated axons !! Diameter (ยตm) !! Conduction velocity (m/s) !! Sensory information !! Usefulness of electroneuromyography | ||
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| Aฮฑ || Yes ย || 13-20 ย || 80-120 || muscle spindle primary endings, golgi tendon organs, touch (and alpha motor neurons) ย || Yes ([[Nerve Conduction Studies|H reflex]]) | | Aฮฑ || Yes ย || 13-20 ย || 80-120 || muscle spindle primary endings, golgi tendon organs, touch (and alpha motor neurons) ย || Yes ([[Nerve Conduction Studies|H reflex]]) | ||
Revision as of 06:44, 19 August 2021
- Characteristics of peripheral nerve fibres
| Nerve fibre | Myelinated axons | Diameter (ยตm) | Conduction velocity (m/s) | Sensory information | Usefulness of electroneuromyography |
|---|---|---|---|---|---|
| Aฮฑ | Yes | 13-20 | 80-120 | muscle spindle primary endings, golgi tendon organs, touch (and alpha motor neurons) | Yes (H reflex) |
| Aฮฒ | Yes | 6-12 | 33-75 | Discriminative sensitivity to mechanical stimuli (touch, vibration) | Yes (sensory nerve conduction) |
| Aฮณ | Yes | 4-8 | 15-40 | Touch, pressure (and gamma motor neurons) | |
| Aฮด | 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 |
| C | No | 0.3-1.5 | 0.5-2.0 | "slow" pain, touch, pressure temperature (and postganglionic autonomic). Polymodal. | No |
