Which is not a type of neuron?

The story behind the answer

Perceptual neuron isn’t a recognized neuron type. The classic functional classes are sensory (afferent) neurons that carry signals from receptors to the central nervous system, interneurons that process and relay information within the CNS, and motor (efferent) neurons that send commands to muscles and glands. “Perception” arises from networks of these neurons—especially sensory pathways and cortical interneurons—rather than from a distinct “perceptual” neuron.

Remember it with the reflex arc and the mnemonic SIM: Sensory → Interneuron → Motor. Touch a hot stove (sensory), the spinal cord processes it (interneuron), and your hand pulls back (motor). Interneurons make up the majority of neurons in the brain, enabling complex processing that underlies perception, learning, and decision-making.