In spinal cord injury, which statement describes sensory transmission as noted?

• A. No Transmission of Stimuli to Brain – No "Ouch"
• B. Stimuli Always Reach the Brain
• C. Stimuli Reach Muscles but Not Brain
• D. No Transmission of Stimuli to Muscles – No Movement

Answer: (A)

The key idea is that spinal cord injury can block the pathways that carry sensory information up to the brain. Sensory signals from receptors travel into the spinal cord and ascend to the brain for conscious perception. If the spinal cord is damaged, these ascending pathways can be interrupted, so stimuli below the injury often don’t reach the brain, and you don’t consciously feel it (no “ouch”). Reflex responses to stimuli can still occur through spinal circuits, but those perceptions don’t reach conscious awareness. That’s why the statement describing no transmission of sensory stimuli to the brain, and thus no conscious sensation, best captures what happens. The other options imply that sensory signals always reach the brain, or mix up sensory with motor pathways in ways that don’t fit how sensory transmission works after spinal cord injury.