Structural difference between a motor and a relay neuron?

Motor neurons and relay neurons differ structurally in their roles and connections within the nervous system. Motor neurons have long axons that extend directly to muscle fibers, enabling them to transmit signals that initiate movement. In contrast, relay neurons, also known as interneurons, possess shorter axons and primarily connect sensory input to motor output within the central nervous system, facilitating the processing and integration of information. This structural specialization reflects their distinct functional roles in neural pathways.