Historically, acupuncture points were believed to be holes that allow entry into channels. These holes provide us gateways to influence, redirect, increase, or decrease body's vital substance, "Qi", thus correcting many of the imbalances. Many studies and research were directed since to understand the mechanism of acupuncture.
Effects of Acupuncture
Acupuncture has been shown to stimulate the immune system. It also affects the circulation, blood pressure, rhythm and stroke volume of the heart, secretion of the gastric acid, and production of red and white blood cells. It also stimulates the release of a variety of hormones that help the body to respond to injury and stress.
The Gate Control Theory of Pain
According to this theory, pain signals must pass through a number of high-traffic "gates" as they move from the area of injury upward through the spinal cord into the brain. Like a road or highway, these nerves can handle only a limited number of nerve signals at one time. The pain signals travels very slowly. We can generate other signals which move faster. The faster signals crowd out the slower ones because of the limited capacity of the nerves. Think about sitting in traffic near a construction zone, where the two lanes merge into one. The fast cars on the merging lanes go further and merge ahead of the slower ones, making it nearly impossible for the slow traffic on the lane to move forward. Now think about the pain signals as the slow ones, sitting there waiting for an opening to move through. If one can produce enough fast signals, they can effectively crowd out the pain signals. Acupuncture generates competing stimulus and thereby effectively blocks the slower pain signals from reaching the brain. The result: we don't "experience the pain".
Electrical Theory of Pain
The body continually generates tiny but detectable electrical discharges. This electrical field influences the growth, maturation, and functioning of some types of cells. It is known that acupuncture points are concentrated in regions of low electrical resistance. Studies have shown that there is a correlation between the electromagnetic fields in the body and the channels or meridians. The electrical theory of acupuncture suggests that acupuncture works by influencing the body's electromagnetic fields. Acupuncture points have certain electrical properties, and stimulating these points alters chemical neurotransmitters in the body