A muscle that opposes the action of another; the biceps and triceps are antagonistic muscles. It is a muscle that is capable of opposing the movement of a joint by producing torque that is opposite to a certain joint action.
Antagonist and agonist muscles often occur in pairs, called antagonistic pairs. As one muscle contracts, the other relaxes. An example of an antagonisic pair is the biceps and triceps; to contract-the triceps relaxes while the biceps contracts to lift the arm. Antagonist muscles oppose a specific movement. This controls a motion, slows it down, and returns a limb to its initial position. Antagonism is not an intrinsic property; it is a role that a muscle plays depending on the motion. If a motion is reversed, agonist and antagonist muscles switch roles. Agonist and antagonist act in opposite directions. When agonist produces an action, antagonist opposes the action. First of all when talking of muscles, agonist is that works with muscles and antagonist is that works against the muscles. Agonist works when the muscles relax and antagonist works when muscles contract.3. While agonists stimulate an action, antagonists sit idle, doing nothing. 4. An agonist ties to a receptor site and causes a response whereas an antagonist works against the drug and blocks the response. 5. Agonists are also chemicals or reactions, which help in binding and also altering the function of the activity of receptors. antagonistic muscle - (physiology) a muscle that opposes the action of another; the biceps and triceps are antagonistic muscles. muscle, musculus-one of the contractile organs of the body. agonist-a muscle that contracts while another relaxes; when bending the elbow the biceps are the agonist. Antagonist. An antagonist is a muscle that is capable of opposing the movement of a joint by producing torque that is opposite to a certain joint action. This is usually a muscle that is located on the opposite side of the joint from the agonist. Agonist (Prime Mover). As stated above, agonist muscles are muscles that are responsible for causing a certain joint motion. However, the term is often defined incorrectly to mean ALL the muscles that have a role in producing a movement. By this definition stabilizers, neutralizers, and fixators are also agonists. 3. agonist-a muscle that contracts while another relaxes; when bending the elbow the biceps are the agonist. antagonistic muscle - (physiology) a muscle that opposes the action of another; the biceps and triceps are antagonistic muscles.gonist - (biochemistry) a drug that can combine with a receptor on a cell to produce a physiological reaction. drug-a substance that is used as a medicine or narcotic. Agonist muscles cause a movement to occur through their own contraction. For example, the triceps brachii contracts during the up phase of a push-up (elbow extension). During the down phase of a push-up, the same triceps brachii actively controls elbow flexion while relaxing.ntagonist muscles oppose a specific movement. This controls a motion, slows it down, and returns a limb to its initial position. Antagonism is not an intrinsic property; it is a role that a muscle plays depending on the motion. If a motion is reversed, agonist and antagonist muscles switch roles. Definition of AGONIST. 1. : one that is engaged in a struggle. 2. [from antagonist] a: a muscle that is controlled by the action of an antagonist with which it is paired. ADVERTISEMENT. Medical Definition of AGONIST. 1. : a muscle that on contracting is automatically checked and controlled by the opposing simultaneous contraction of another muscle—called also agonist muscle, prime mover; compare antagonist a, synergist 2. Antagonist and agonist muscles work in pairs to accomplish a full range of movements and actions. Muscles, however, are not specifically antagonist or agonist. Depending on the movement required, a muscle can be an agonist in one motion and an antagonist during another action. The agonist always contracts to initiate movement and the antagonist stretches and lengthens to allow the movement.ommon pairs of antagonist and agonist muscles exist. In the upper body, the biceps and triceps work to complete actions related to movement of the arm. The quadriceps and hamstrings in the upper leg work to help move the knee joint and perform exercises, such as squats and leg extensions. agonist muscle. Controlled movements involve two opposing muscles: the agonist muscle produces the main action, while the antagonist muscle produces the opposite action to a lesser degree. The balance between agonist and antagonist muscles allows precise control of the final action. See also: muscle. See also: muscle. agonist muscle prime mover (see agonist). antagonist muscle muscles or muscle groups which neutralize action of another muscle or muscle group (see antagonist; muscle contraction). cardiac muscle; myocardium striated heart muscle.
https://en.wikipedia.org/wiki/Agonist_(muscle) http://www.differencebetween.net/science/difference-between-agonist-and-antagonist/ http://www.thefreedictionary.com/antagonistic+muscle http://www.gustrength.com/kinesiology:what-is-anagonist-antagonist-stabilizer-fixator http://www.thefreedictionary.com/agonist https://en.wikipedia.org/wiki/Agonist_(muscle) http://www.merriam-webster.com/dictionary/agonist http://www.wisegeekhealth.com/what-are-the-differences-between-antagonist-and-agonist-muscles.htm http://medical-dictionary.thefreedictionary.com/agonist+muscle
define agonist muscles