Find over 25,000 psychological definitions


A fiber

a myelinated nerve fiber (axon) of the somatosensory system. A fibers are subdivided by diameter, ranging from largest to smallest: A-alpha fibers are 13 to 20 μm in diameter and transmit information from proprioceptors of skeletal muscles, A-beta fibers are 6 to 12 μm and transmit information from mechanoreceptors of the skin, and A-delta fibers are 1 to 5 μm and transmit temperature and sharp pain information. See also B fiber; C fiber.

Browse dictionary by letter

a b c d e f g h i j k l m n o p q r s t u v w x y z

Psychology term of the day

November 15th 2024

acquisitive stage

acquisitive stage

see Schaie’s stages of cognitive development.