Nerve Fiber - Sensory Fibers of The A Group

Sensory Fibers of The A Group

A alpha fibers (Ia fiber or Ib fibers)

  • Characteristics:
    • High conduction velocity
    • Ia fibers are related to muscle spindle primary endings (muscle sense)
    • Ib fibers are related to golgi tendon organs (muscle sense)

A beta fibers (II fibers)

  • II fibers carry sensory information related to muscle spindle secondary endings, touch, and kinesthesia.

A delta fibers (III fibers)

  • III fibers carry sensory information related to pain, temperature, crude touch, and pressure.

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