Relay neurons are a type of neuron in the central nervous system that form a connection between other neurons. They are also known as interneurons and are neither motor nor sensory. Relay neurons are found in the brain and spinal cord. They allow sensory and motor neurons to communicate by relaying information between them. Relay neurons are a part of a simple reflex arc, where they receive electrical impulses from a sensory neuron and pass them on to a motor neuron. They are also found in the thalamus, where they are believed to relay information from cortical inputs back to the cortex. Relay neurons have a short axon and a smaller structure than motor or sensory neurons.