Flexion Of Muscles

The anatomy and physiology of the human body explains that muscles are attached to the skeleton. They work like hinges or levers to pull or move particular joints when a muscle contracts, pulling the joint in the direction it is designed to move. Parts of muscles move antagonistically, that is, when one contracts, its opposite member relaxes to allow movement. Muscles can become slack, making movement slower and more difficult.

Shoulder flexion/extension; Elbow flexion and extension; Use of the lower and upper back. Muscles involved include the latissimus dorsi, rhomboids, trapezius, deltoids and the pectorals.

Secondly it allows movement as muscles cross joints and attach bone to bone. Muscles work in pairs and skeletal muscles can pull in one direction and for this reason they always come in pairs. Due to the fact that two muscles work together, as one muscle in the pair contracts the other muscle relaxes for example as the bicep contracts the triceps relaxes to once again straighten the joint out.

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.

The shoulder is a ball and socket joint which allows it a flexion and extension motion.

The muscular system is responsible for the movement of the human body. Without muscle, humans could not live. Attached to the bones of the skeletal system are about 700 muscles. Muscles produce not only those movements that are under the control of our will and that we can see and feel, but are responsible for everyday activities like breathing, digestion of food, pumping of blood.

The tendon is a flexible but inelastic cord of strong fibrous collagen tissue attaching a muscle to a bone. The origin is the end that doesn’t move when the contraction occurs, while the insertion is the moves with the contraction. The superficial is the thin layer of loose fatty connective tissue underlying the dermis and binding it to the parts beneath it. The antagonist in a movement refers to the muscles that oppose the agonist. During elbow flexion where the bicep is the agonist, the tricep muscle is the antagonist. The synergist in a movement is the muscle(s) that stabilises a joint around which movement is occurring, which in turn helps the agonist function effectively. Synergist muscles also help to create the movement. In the bicep

The prime movers in the left shoulder that move it back to its neutral position are the anterior deltoid and the bicep brachii. Concentric contractions followed by eccentric contractions of both of these muscles move the shoulder from extension and abduction to it neutral state by flexing and adducting the shoulder. The prime movers in the right shoulder are again the anterior and middle deltoid along with the supraspinatus that contract isometrically to keep the shoulder in horizontal abduction. When the right shoulder is let down after follow through, the prime movers are the triceps and the posterior deltoids which eccentrically contract to extend the shoulder to its neutral position. Therefore the muscles of the shoulder are exceedingly imperative to the action of shoot a

Stability of the elbow joint is achieved from the elbow osseous structures and the surrounding soft tissues [1, 2, 3, 4, 5]. Primary stability at elbow flexion less than 20° and more than 120° is imparted by the olecranon fossa articulation. However, in the dynamic range of motion predominantly used by baseball pitchers (20–120° of flexion), soft tissue structures are responsible for primary stability of the elbow [1, 2, 3]. For this reason, baseball pitchers are at higher risk of soft tissue injury at the elbow [1, 2,

The antagonist is the posterior deltoid, latissimus dorsi, and triceps brachii. When the shoulder performs extension the agonist (prime mover) is posterior deltoid and latissimus dorsi. The antagonist is anterior deltoid and pectoralis major. During shoulder adduction the agonist muscle is the latissimus dorsi and pectoralis major; the antagonist muscle is the deltoid (middle). When shoulder abduction is performed the agonist muscle is the deltoid (middle) and the antagonist muscle is the latissimus dorsi and pectoralis major (FCG, 2016). In wrist flexion the agonist muscle is flexor digitorum and the antagonist is extensor digitorum. When performing wrist extension the agonist muscle is the extensor digitorum and the antagonist is flexor digitorum. In elbow flexion the agonist muscle is the biceps brachii and the antagonist muscle is triceps brachii. During elbow extension the agonist muscle is the triceps brachii and the antagonist muscle is biceps brachii. In trunk flexion the agonist muscle is the rectus abdominis and the antagonist muscle is erector spinae. When performing trunk extension the agonist muscle is the erector spinae and the antagonist muscle is rectus abdominis (BBC, 2016). During hip flexion the agonist muscle is the illiopsoas/quadriceps and the antagonist muscle are gluteus maximus/hamstrings. When performing hip extension the agonist muscle is the glueteus maximus/hamstrings and the antagonist are lliopsoas/quadriceps. During knee flexion the agonist muscle is the hamstring and the antagonist are quadriceps. When performing knee extension the agonist muscle are the quadriceps and the antagonist are the hamstrings. During dorsiflexion the agonist muscle are the tibialis anterior and the antagonist are gastrocnemius/soleus. When plantar flexion is performed the agonist muscle is the gastrocnemius/soleus and the antagonist are

Skeletal muscle contractions play a pivotal role in our day-to-day lives. Their main function is to generate force and provide our bodies with structural integrity. For many of us, muscle contractions seem effortless, but there’s actually quite a bit going on under the surface. Our muscles are composed of sarcomeres, units of skeletal muscle fibers, which are made up of actin and myosin contractile filaments. These filaments need to bind to each other in order to lengthen and shorten the sarcomere. However, the binding sites for actin and myosin are blocked by troponin and tropomyosin proteins. In order to get them off of the binding sites, calcium needs to bind to the troponin, which then lifts

A muscle is strained when there is too much pressure put on a muscle. Whether you pull your muscle while playing a sport or just in your everyday activities, it is helpful to know how to treat it. Some are too severe to treat at home, so you would need to go to a doctor. This article will tell about some symptoms and treatments for a muscle strain.

Muscles origin are always connected to the immovable bone, on the other side, the intersection is connected to the movable bone. Movement of the body occurs when muscles contract across joints and their attachments move toward the origin. Movements that are called Angular can increase or decrease the angle between the bones. Flexion can decrease the angle of the joint and can make the articulating bone come closer, an example could be nodding you head. An extension is the opposite and can make the angle larger.

This type of muscle is the most prominent muscle throughout the muscular system in vertebrates. These types of muscles are affixed to bones by tissue called tendons, their main role is to provide movement of the bones by contracting and relaxing. The way this works is in antagonistic pairs. An example of an antagonistic pair is in the arm. The bicep muscle contracts when the arm is lifted, pulling the bone up while the tricep muscle relaxes. However when the arm is lowered, the bicep muscles relaxes and the tricep muscle contracts, pulling the bone down. The muscle that contracts is known as the agonist, it provides a force which completes the movement so when the arm is lifted, the bicep is the agonist but when the arm is lowered, the tricep

If you just had a baby and want your body back fast then why shouldnt you do flexion exercises (sit-ups, crunches…) immediately following the birth?