MUSCLE PHYSIOLOGY

Detailed explanation-1: -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-2: -1. Origin: Non-moving fixed portion, attached to bones or other fixed muscle; means attached to bone. 3. Insertion: Portion of muscle joined to moveable attachments (bone, movable muscles or skin).

Detailed explanation-3: -Origin and Insertion In most cases, one end of the muscle is fixed in its position, while the other end moves during contraction. The origin is the attachment site that doesn’t move during contraction, while the insertion is the attachment site that does move when the muscle contracts.

Detailed explanation-4: -Muscle origin is a term referring to one end of a muscle, generally at the location where it attaches to a bone. The main part of the muscle called the belly of the muscle, then crosses over the gap between this bone and another usually adjacent bone-to attach there.

Detailed explanation-5: -• Muscles are attached to bones by tendons. • The attachment of the tendon to the more stationary bone is called the origin. The attachment to the more movable bone is called the insertion.