Question

On the day Leslie is to present his oral presentation, he wakes up with a painful strained back muscle. During the presentation, he felt no pain in his back. Not until 20 minutes after the presentation is over does Leslie become aware of his strained back again. Leslie's occurrence is best explained by:

gate-control theory
frequency theory
opponent-process theory
trichromatic theory
pain theory

Answer 1

The answer is gate control theory. Let's go through each of them to better understand why.
Gate-Control theory: is the theory that non-painful stimuli can "close" the pain-gate to block the pain signals from reaching the brain. In this case, the non-painful stimuli is the oral presentation which blocks the pain signals.

Frequency Theory: This is a hearing theory. The frequency of the auditory nerve's impulses are due to the frequency of a sound.

Opponent Process Theory: This is a vision-related theory explaining color vision.

Pain Theory: This is made up.