How does a crossed extensor reflex both serial and parallel processing?

The crossed extensor reflex involves both serial and parallel processing to coordinate responses to stimuli. In this reflex, sensory neurons send signals to the spinal cord, where they synapse with interneurons that facilitate a serial processing pathway for the immediate withdrawal of the affected limb. Simultaneously, the interneurons also activate other motor neurons on the opposite side of the body, allowing for a parallel processing pathway that stabilizes and supports the body during the withdrawal. This dual processing ensures a swift and coordinated response to a noxious stimulus.