Type A: large-diameter (4-20 µm), heavily myelinated. Conduct at 15-120 m/s (= 300 mph).
Motor neurons supplying skeletal muscles and most sensory neurons carrying info. about position, balance, delicate touch
Type B: medium-diameter (2-4 µm), lightly myelinated. Conduct at 3-15 m/s.
Sensory neurons carrying info. about temperature, pain, general touch, pressure sensations
Type C: small-diameter (0.5-2 µm), unmyelinated. Conduct at 2 m/s or less.
Many sensory neurons and most ANS motor neurons to smooth muscle, cardiac muscle, glands