What Are Muscles Origin?

during these movements, the angles of those joints, as well as the muscles involved during the

There are about 600 muscles in the body working together to create movement. Muscle contractions pull both ends of the muscle towards one another. One bone attached to each muscle is always more stabilized than the other. The less stabilized bone moves during muscle contraction due to the weaker stability. The points of attachment determine which bone will move. The least movable part is called the origin; it is the part that attaches closer to the midline of the body. This leaves the most movable part called the insertion. Each of these points can be identified in individual muscles to assist trainers in understanding how the muscles and joints work together to create motion.

Individual muscles are made up of individual muscle fibers and these fibers can be further organized into a motor unit grouped within each muscle. A motor unit is simply a bundle of grouped muscle fibers. When you want to move the brain instantaneously sends a signal or impulse through the spinal cord that reaches the motor unit. Muscle fibers are cells like the basic building block of the muscle. There are a few different types of muscle fibers, each are designed for a specific type of muscle activity. Some muscle fibers are good for endurance exercises, other work best for the short bursts. Each muscle fiber is a single cell. Each cell consists of a structure.

The relationship between bone and muscles, attached by tendons, make most of an organism's movement possible. Muscles are able to move body parts by contracting and then relaxing. A skeletal muscle is attached to one bone at the origin and moves the bone at the insertion. Muscles are paired due to their inability to move by themselves. One muscle pulls a bone in one direction, and another pulls that bone back to its original position. Muscles can pull bones, but they can't push them back to their original position, which makes them work in pairs of flexors and extensors. The flexor contracts to bend a limb at a

There are six primary movements that occur at the joints between the body segment; flexion, extension, abduction, adduction, rotation, and circumduction.

to contract, which then allows body movements and functions? There are two types of muscles in

The contraction of the extent which the The direction which the bone of the joint move depends on the contraction of the muscle.

Second we have extension, which is the opposite of flexion, causing an increase in angles between body parts. The best example exercise for extension would be leg extensions, which causes movement and extension at the knee in order to stretch and strengthen the legs.

This arrangement means that muscles are able to work together, allowing for one limb to be straightened by one muscle and to be bent by the other. Muscles that bend a limb are called flexors and muscles that straighten a limb are called extensors.

Summary… A condition which is characterized by an inability of the muscles to function at their full strength; a vague complaint of debility, fatigue, or exhaustion attributable to weakness of various muscles. The weakness can be characterized as subacute or chronic, often progressive, and is a manifestation of many muscle and neuromuscular diseases.

For the head and neck, the motion that occurs is an extension. Some muscles act concentrically or shortening. Other muscles act eccentrically, meaning the muscles lengthen while producing force. Additionally, other movements involved include shoulder striking and flexing, elbow flexion, extension, hip flexion, neutral back and core, shoulder, elbow, knee flexion, and forearm, wrist, hand extension and flexion, foot dorsiflexion and plantarflexion (7).

your calf must contract to extend your ankle this is called plantar flexion, while the muscles on the front of your shin contracts to hold your ankle rigid. The action muscle in place there is called an isometric contraction, where the muscles create tension but, they are not causing any actual joint movement they are just holding the ankle in place.

One example of a movement at a synovial joint would be flexion. Flexion is a physical position that declines the angle between the bones of the limb at a joint. It happens when muscles contract and bones change the joint into a bent position. For example, bending the elbow, or clenching a hand into a fist, are examples of flexion. When sitting down, the knees are flexed. When a joint can move forward and backward, such as the neck and trunk, flexion refers to movement in the anterior direction. Flexion of the shoulder or hip refers to movement of the arm or leg forward. Extension the opposite to flexion. Extension is the bodily position that will increase the angle at a joint between the bones. For example, when standing up, the knees extend.

There are three types of joins in the skeletal system each allowing different types of movements.

The skeletal muscle pump is a number of skeletal muscles which help the heart by circulating blood. The skeletal muscle pump plays an important role in the increase of venous returning back to the heart. It starts to work when contractions apply pressure against the vein. The valves that is proximal to the region where the contractions have occurred are pushed open which allows the blood to drive back into the heart. The other valves which is located near the distal region of contraction are sealed by the blood that is back flowing. The vessels that it operates on are called the arterioles, their function is to regulate the blood flow into different tissues. These vessels then branch into the capillaries which is the tinniest blood vessels in the human body. It is different because each time that the heart pumps it pushes the blood