Which statement reflects the Gate Control Theory?

• A. Pain signals can be amplified by applying pressure
• B. Pain signals can be blocked by applying pressure
• C. Pain signals are unaffected by touch
• D. Pain signals only modulated by temperature

Answer: (B)

The Gate Control Theory describes a mechanism in the spinal cord where non-painful input can close the “gate” to painful signals, reducing what reaches the brain. When you apply pressure or rub a painful area, the large-diameter touch fibers are activated and compete with the smaller pain fibers. This competition inhibits the transmission of pain signals to projection neurons, effectively dampening pain perception. So, pain signals can be blocked or significantly reduced by applying pressure, which is the essence of this theory.

The other statements don’t fit because the theory centers on non-painful input modulating pain, not amplifying it. It also shows that touch and pressure do influence pain, contrary to the claim that pain signals are unaffected by touch, and it is not limited to modulation by temperature.