Which neurons intervene within the CNS between sensory inputs and motor outputs?

• A. Sensory Neurons
• B. Interneurons
• C. Motor Neurons
• D. Central Nervous System

Answer: (B)

Signals from sensory receptors travel to the central nervous system where they’re understood and acted upon. The neurons that perform this bridging and processing are interneurons. They reside entirely within the CNS and connect sensory pathways to motor pathways, enabling the brain and spinal cord to integrate information, refine responses, and coordinate actions. They can combine signals from different sources and modulate responses with inhibitory or excitatory signals, supporting both simple reflexes and complex processing. That’s why interneurons are the ones that intervene between sensing and acting. Sensory neurons simply carry information into the CNS, and motor neurons carry commands out to muscles. The CNS is the brain and spinal cord, not a neuron type.