What does gate control theory state?

What does gate control theory state?

• A. A gating mechanism in the dorsal horn of the spinal cord allows only one sensation at a time to reach the brain
• B. Pain signals bypass the spinal cord and go directly to the brain
• C. Pain is solely produced by C-fibers
• D. The brain generates pain independently of spinal input

Answer: (A)

Gate control theory proposes a gating mechanism in the dorsal horn of the spinal cord that modulates how much nociceptive information actually gets through to the brain. When nonpainful input activates large-diameter fibers (like touch or pressure), it can close this gate and dampen pain signals carried by small-diameter fibers. This is why rubbing an injury or using modalities like TENS can reduce pain—by increasing nonpainful input at the spinal level, the gate limits the pain input that reaches conscious awareness. The brain does not generate pain in isolation from spinal input, and pain is not produced solely by C-fibers, nor does pain bypass the spinal cord.

Gate control theory proposes a gating mechanism in the dorsal horn of the spinal cord that modulates how much nociceptive information actually gets through to the brain. When nonpainful input activates large-diameter fibers (like touch or pressure), it can close this gate and dampen pain signals carried by small-diameter fibers. This is why rubbing an injury or using modalities like TENS can reduce pain—by increasing nonpainful input at the spinal level, the gate limits the pain input that reaches conscious awareness. The brain does not generate pain in isolation from spinal input, and pain is not produced solely by C-fibers, nor does pain bypass the spinal cord.