the point of input voltage at which Q1 begins to conduct

Despite the name, trigger point therapy actually has absolutely nothing to do with a gun. In this case, a "trigger point" is a muscle or other part of the body that is stressed and much overused. Trigger point therapy stresses care for that particular place.

Action potential is nerve impulse triggered when a neuron reaches its threshold, or trigger point for firing. Threshold trigger point for a neuron's firing about negative 50 millivolts.

Trigger point therapy is said to interrupt the neural signals that cause both the trigger point and the pain. The object is to eliminate pain and to reeducate the muscles into pain-free habits.

Trigger Point works well better for pain, and more so for a dull ache type of pain then an throbbing or stabbing type of pain. Trigger pains are often worse when a muscle is strained so The Trigger Point equipment may be helpful to you.