MICROANATOMY

Detailed explanation-1: -Contraction will move limbs associated with that joint. In this sense, the bone acts as a lever with the attached muscle fiber’s contraction, driving movement. During flexing of the forearm the biceps brachii is the agonist muscle, pulling the forearm up towards the shoulder.

Detailed explanation-2: -Muscles work in pairs to facilitate movement of the bones around the joints. Agonists are the prime movers while antagonists oppose or resist the movements of the agonists. Synergists assist the agonists, and fixators stabilize a muscle’s origin.

Detailed explanation-3: -Skeletal muscles consist of flexible muscle fibers that range from less than half an inch to just over three inches in diameter. These fibers usually span the length of the muscle. The fibers contract (tighten), which allows the muscles to move bones so you can perform lots of different movements.

Detailed explanation-4: -Synergist: The synergist in a movement is the muscle(s) that stabilises a joint around which movement is occurring, which in turn helps the agonist function effectively. Synergist muscles also help to create the movement.

Detailed explanation-5: -Agonist vs Antagonist Muscles The agonist muscle initiates the movement of the body during contraction by pulling on the bones to cause flexion or extension. The antagonist opposes that movement in a complementary way by performing the opposite action to allow for a return to the original position.