In Pain Clinics, Mild Electric Currents Are Applied to the Skin

Multiple Choice

In pain clinics, mild electric currents are applied to the skin or directly to the spinal cord. This procedure sends mild pain messages to the spinal cord and brain, which effectively close the neurological gates to reduce the patient's more agonizing pain. This technique is an application of the __________ theory.

A) sensory conflict
B) lock-and-key
C) gate control
D) sensory adaptation.