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How it works
How Pain Develops
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Nervous System
During pregnancy, the central nervous system of the human fetus is the first system to be developed. The C.N.S. will then innervate and activate every cell in the body, including the structure of the muscular system. The muscles work like cables to mobilize the skeletal system (the bones of the human body). Muscles are not independent structures. They receive messages from the C.N.S. through reflexes, which are currents of electrical impulses. These reflexes form the communication system between the nervous system and the muscle. These messages inform the muscles to contract, to spasm, or to relax. When a muscle is painful, it is because the muscle is in a "protective muscle spasm" initiated by the C.N.S. Hyperactivity of the reflex will hold the muscle in spasm. This reflex is indefatigable. It does not get tired and can last for years. In this way, acute pain becomes a chronic condition. Since the spastic muscle is not able to relax, it is held in a constant contraction, resulting in the continuous shortening of muscle fibers.
Muscular System
Muscle fibers then compress and constrict blood vessels, decreasing the ability of the vessels to carry oxygen and nutrition to the muscle cells and to carry away by-products of metabolism (lactic acid). As a result of this process, the chemical environment in the muscle is changed. It will be saturated by lactic acid, which is a noxious irritant for the nervous system and will cause pain. The muscle has become ischemic (oxygen deprived) and spastic
Joints
Spastic muscles compress the joint (2 or 3 bones attached together), increasing the pressure on the joint during movement. This could affect any joint in the body, including the knee, hip or shoulder. Gradually, the joint itself will deteriorate and may wear out. After many years, it may need to be replaced. Spastic muscles also cause confusion within the C.N.S which can inhibit and weaken other muscles. As the muscular system is thrown out of balance, some muscles will overwork and others may not work at all, resulting in inefficient mobility, excessive energy consumption and pain. Everyday life situations such as long hours sitting at the computer, commuting by car, lack of physical activity, as well as accidental injuries threaten to disrupt muscular balance. |
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