what is the the fascicle arrangement type of origin type of

what is the the fascicle arrangement ,type of origin ,type of insertion, direction of action, relative power and range motion of orbicularis oculi muscle?

Solution

Fascicle is bundle of fibers. All skeletal muscle is made up of fascicles, but fascicle arrangements vary considerably, resulting in muscles with different shapes and functional capabilities.

Fascicle arrangement in Orbicularis oculi muscle: Cirulcar fascicular arrangement exists in these muscles. The fascicular pattern is circular when the fascicles are arranged in concentric rings. Muscles with this arrangement surround external body openings, which they close by contracting. Circular muscles are also called sphincters.

When they relax, the sphincters concentrically arranged bundles of muscle fibers increase the size of the opening, and when they contract, the size of the opening shrinks to the point of closure. The orbicularis oculi, one of which surrounds each eye.

The arrangement of a muscle’s fascicles determines its range of motion and power. Skeletal muscle fibers only shorten about 70% of their resting length. The longer and more parallel the fibers are à the more the muscle can shorten usually not very powerful.