Which neuron relays information within the central nervous system?

Which neuron relays information within the central nervous system?

• A. Sensory neuron
• B. Motor neuron
• C. Nerve
• D. Interneuron

Answer: (D)

Interneurons relay information within the central nervous system. These neurons reside entirely in the brain and spinal cord and form the networks that process, integrate, and coordinate signals. They receive input from sensory pathways and other interneurons, determine an appropriate response, and pass signals on to motor neurons or to other processing centers. This internal relay and processing is what distinguishes them from other neurons. Sensory neurons bring information into the CNS, but don’t relay it within the CNS themselves; motor neurons carry commands from the CNS to effectors like muscles. Nerves are bundles of many nerve fibers outside the CNS, not a single neuron type.

Interneurons relay information within the central nervous system. These neurons reside entirely in the brain and spinal cord and form the networks that process, integrate, and coordinate signals. They receive input from sensory pathways and other interneurons, determine an appropriate response, and pass signals on to motor neurons or to other processing centers. This internal relay and processing is what distinguishes them from other neurons. Sensory neurons bring information into the CNS, but don’t relay it within the CNS themselves; motor neurons carry commands from the CNS to effectors like muscles. Nerves are bundles of many nerve fibers outside the CNS, not a single neuron type.