MUSCLE PHYSIOLOGY

Detailed explanation-1: -Skeletal Muscle Attachments: The point of attachment of a muscle that remains relatively stationary when the muscle contracts is the muscle’s origin. The point of attachment that moves when the muscle contracts is the muscle’s insertion.

Detailed explanation-2: -A skeletal muscle attaches to bone (or sometimes other muscles or tissues) at two or more places. If the place is a bone that remains immobile for an action, the attachment is called an origin. If the place is on the bone that moves during the action, the attachment is called an insertion.

Detailed explanation-3: -An origin tendon is attached to a fixed location, while the insertion tendon is attached to a more movable location. Sheets of con-nective tissue, called aponeuroses, also serve for some muscle attachments. An example of a large aponeurosis visible on the torso or a muscle chart is in the abdomi-nal area.