Gate Control Theory of Pain proposes that pain perception decreases when the brain receives other stimuli; which of the following examples illustrates this concept?

• A. Pain perception decreases when the brain receives other stimuli, such as massage or music.
• B. Pain perception is determined only by tissue damage and cannot be altered.
• C. Pain perception increases with additional stimuli.
• D. Pain perception is unaffected by sensory input.

Answer: (A)

Pain perception can be modulated by competing sensory input. According to Gate Control Theory, activating large-diameter nerve fibers with non-painful stimuli (like massage or hearing calming music) can close the neural gate in the spinal cord and dampen the transmission of pain signals to the brain. This means the brain receives less pain information when other sensory input is present, so the experience of pain decreases even if tissue damage is unchanged. That’s why the example of massage or music reducing pain fits the theory best. The other ideas assume pain is fixed by damage alone or unaffected by sensory input, which isn’t what this theory proposes.