A client with chronic pain uses a machine to monitor his physiologic responses to pain. The unit transforms the data into a visual display and through seeing the pain responses, the client is taught to regulate his physiologic response and control pain through relaxation, imagery, or breathing exercises. This technique for pain control is known as:
a. biofeedback.
b. transcutaneous electrical nerve stimulation (TENS).
c. hypnosis.
d. therapeutic Touch (TT).

Biofeedback.

Explanation:

Biofeedback is known as a technique that is with the help of using a machine to monitor physiologic responses and regulate through electrode sensors on the client's or patient's skin. They (client) can observe the pain responses, by the help of the unit transforms the data into a visual display and the client is taught to control pain and regulate his physiologic response through the help of breathing exercises, relaxation or imagery.

Different receptors that are present on the human body that can initiate a different response and detect the pain stimuli in the body. The different types of techniques that are used for pain relief are known as biofeedback, cold, and yoga.