Acupuncture is the insertion of needles into predetermined points along channels which run throughout the body and correspond to symptoms, diseases and organ functions. The insertion of needles into these points can alter physiological and biochemical conditions in order to treat a wide variety of illnesses. Acupuncture has been shown to transmit its effects via electric, neurological, hormonal, lymphatic, and cardiovascular pathways. When a needle is inserted it will stimulate one of these pathways. For example, when the needle is inserted it may stimulate a nearby nerve fiber to transmit signals to the spinal cord and brain, thus activating parts of the central nervous system. The spinal cord and brain then release specific hormones responsible for controlling everything from heart-rate to sleep. Acupuncture has also been show to help regulate blood circulation, body temperature, white blood cell activity (responsible for our immune function), reduce cholesterol and triglyceride levels, and regulate blood sugar levels.