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.
Academically, breadth refers to the ability to connect many disciplines of study in a coherent manner. Depth is when someone masters one particular body of knowledge. Both breadth and depth are needed to achieve independence of thought, according to the University of Guelph.