Costanzo Neurophysiology - Sensory Nerve Fiber Types Flashcards
What is a type A-alpha fiber?
large alpha motor neuron
What are the sensory fiber types of A-alpha fibers?
Ia - Muscle spindle fibers
Ib - golgi tendon organs
What is the relative diameter and conduction velocity of the sensory fiber types of A-alpha fibers?
Large diameter
fast conduction
What is an A-beta fiber?
Neuron for touch, pressure (no name)
What are the sensory fiber types of A-beta fibers?
II - secondary afferents of muscle spindles, touch and pressure
What is the relative diameter and conduction velocity of the sensory fiber types of A-beta fibers?
Medium diameter
Medium conduction velocity
What is a type A-gamma fiber?
gamma motor neurons to muscle spindles (intrafusal spindles)
What is the relative diameter and conduction velocity of the sensory fiber types of A-gamma fibers?
Medium diameter
Medium conduction velocity
What is a type A-delta fiber?
No specific name
Detects touch, pressure, temperature, and pain
What are the sensory fiber types of A-delta fibers?
III - touch, pressure, fast pain, and temperature
What is the relative diameter and conduction velocity of the sensory fiber types of A-delta fibers?
Small diameter
Medium conduction velocity
What is a type B fiber?
Preganglionic autonomic fibers
What is the relative diameter and conduction velocity of the sensory fiber types of B fibers?
Small diameter
Medium conduction velocity
What is a type C fiber?
Slow pain
Postganglionic autonomic fibers
What are the sensory fiber types of C fibers?
IV - pain and temperature - unmyelinated
