The cause of fibromyalgia is unknown; however, it is believed to involve a combination of genetic and environmental factors with half the risk attributed to each. The condition runs in families and many genes are believed to be involved.
Agonist: A substance that acts like another substance and therefore stimulates an action. Agonist is the opposite of antagonist. Antagonists and agonists are key players in the chemistry of the human body and in pharmacology.
Agonist: âprime moverâ; a muscle or muscle groups that cause the motion. Assisting mover: assist in providing the desired motion. Antagonist: muscle that performs the OPPOSITE motion of the agonist; roles change depending upon. the particular joint action. Cocontraction: when agonist and antagonist contract at the same time. Stabilizer: muscle or muscle group that supports, or makes firm, a part and allows the agonist to work.