Which neuron type is most commonly associated with connecting signals within the CNS?

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Interneurons are the neurons that connect signals within the CNS, forming local circuits that process and integrate information. They stay entirely inside the brain and spinal cord, linking sensory inputs, other interneurons, and motor neurons to refine responses and coordinate activity. This local wiring enables rapid processing, modulation, and timing of signals as they move through neural networks, which is the hallmark of connecting information within the central nervous system. In contrast, sensory neurons bring information from the body into the CNS, and motor neurons carry commands from the CNS to muscles or glands. Pyramidal neurons are a type of excitatory projection neuron in the cortex that sends signals to distant brain regions, not primarily serving as the local connectors within CNS circuits. So the neuron type most associated with connecting signals within the CNS is the interneuron.