The diagram on the below shows the three functional classes of neurons: sensory, motor, and interneurons. Sensory (= afferent) neurons conduct action potentials into the central nervous system from receptors in the internal organs, skin, joints, skeletal muscles, and sensory organs. After entering the CNS, sensory neurons transmit information to interneurons (= internuncial or association neurons). The billions of multipolar interneurons in the CNS perform many complex tasks. First, they consciously (or subconsciously) integrate, image, and interpret, the incoming sensory information. Next, they form judgments and make needed decisions. Finally, they plan and execute appropriate response behaviors. The interneurons transmit their response plans to multipolar motor (= efferent) neurons, which then conduct action potentials out of the CNS to the proper effectors.