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.
penetration-the depth to which something penetrates (especially the depth reached by a projectile that hits a target). depth, deepness-the extent downward or backward or inward; the depth of the water; depth of a shelf; depth of a closet.