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.
Depth of field is defined as the range of object distances within which objects are imaged with acceptable sharpness. A shallow depth of field would mean that only objects within a small distance in a scene would be focused; everything else would be out-of-focus.