transmit the sensory impulse to the appropriate part of the brain or spinal cord for interpretation and processing; also known as association neurons.
depth. 1  the distance from the top downward, from the surface inward, or from front to back. 2  perspective, as in a painting. 3  the quality or condition of being deep; deepness; specif., 4  intensity, as of colors, silence, or emotion.
3 : the quality of being deep the depth of the pass. 4 : the degree of intensity depth of a color; also : the quality of being profound (as in insight) or full (as of knowledge) the depth of her experience. 5 : the quality or state of being complete or thorough a study will be made in depth.