APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -Muscles move body parts by contracting and then relaxing. Muscles can pull bones, but they can’t push them back to the original position. So they work in pairs of flexors and extensors. The flexor contracts to bend a limb at a joint.

Detailed explanation-2: -Muscles can only pull and cannot push. Therefore muscles have to work in pairs to move a joint. One muscle will contract and pull a joint one way and another muscle will contract and pull it the other.

Detailed explanation-3: -Muscles are wonderful things, but most people really do not know how they work. Your muscles move you by pulling or relaxing. That is all. Muscles cannot push.

Detailed explanation-4: -Because muscle tissue can only contract that is, become shorter and thicker, a muscle can pull but it cannot push. It will return to its original shape when it relaxes but it has no power to push itself back to its relaxed shape.

Detailed explanation-5: -Antagonistic muscles Muscles can only contract and relax. This means for skeletal muscles, they can only pull on bones. They cannot push them back. This would mean that if your joints were moved by one muscle, then you would be able to move them once and not return them to their original position.