What happens to the gate in gate control theory when a painful stimulus is felt and there is treatment?

What happens to the gate in gate control theory when a painful stimulus is felt and there is treatment?

• A. Always closed
• B. Closes when felt and opens with treatment
• C. Opens when felt and closes with treatment
• D. Always open

Answer: (C)

The gate control mechanism modulates pain signals at the spinal cord level. When a painful stimulus is felt, signals from small-diameter pain fibers tend to open this gate, letting more pain information reach the brain. Applying treatment or counter-stimulation activates non-painful input that closes the gate, reducing the transmission of pain signals. So, the gate opens with pain and closes with treatment. If both are present, the pain experience is influenced by which input dominates—the treatment can lessen pain by closing the gate. The other options don’t fit because the gate isn’t permanently open or closed, and pain alone doesn’t keep the gate closed.

The gate control mechanism modulates pain signals at the spinal cord level. When a painful stimulus is felt, signals from small-diameter pain fibers tend to open this gate, letting more pain information reach the brain. Applying treatment or counter-stimulation activates non-painful input that closes the gate, reducing the transmission of pain signals. So, the gate opens with pain and closes with treatment. If both are present, the pain experience is influenced by which input dominates—the treatment can lessen pain by closing the gate. The other options don’t fit because the gate isn’t permanently open or closed, and pain alone doesn’t keep the gate closed.