Tonic Muscles

The muscles play major role in the body. Produce movement, maintain posture, stabilize joints, and help generate heat, assist in blood circulation. There are three types of muscles. Skeletal muscle, smooth muscle, and cardiac muscle. Skeletal muscles are most abundant and found attached to skeleton. They respond quickly to stimuli, help in adjusting individual to external environment and being capable of rapid contractions. Skeletal muscle act by contraction that results in shortening and pull on the tendons. Than this transfers the force to bone attached and makes desired movements. Skeletal muscles rarely work by themselves to make movements in the body. The biceps brachii muscle extends the arm at the elbow. When triceps is extending the

The human body consist of 680 skeletal muscles. The name of a muscle can distinguish its location, action, shape, and function. One such example is the biceps brachii, which is commonly referred to as biceps. As the name implies, this is a two-headed muscle. The term biceps brachii is a Latin phrase that means, "two-headed muscle of the arm." This is references to the fact that the muscle consists of two bundles of muscles. Each of these bundles has its own origin and share a common insertion point near the elbow joint. The biceps brachii muscle is the one that gave all muscles their name because it comes from the Latin, musculus, meaning, "little mouse.". This originated because the appearance of the flexed biceps resembles the back of the

The musculoskeletal involves the muscles and skeletal system which consist of bones supporting the bodyweight. The muscles and bones help in movement and maintaining body position through the physiological process of contraction and relaxation, muscles pulling on the bones. The skeletal systems also consist of cartilages and ligaments important for bone connection and stability with connective tissue. The muscles get attached to the bone by the connective tissue enhancing contraction and relaxation in movement. The muscles contain long muscle fibers responsible for the contraction and relaxation. The fibers contain bundles some of which allow slow movement described as slow twitch and fast twitch which ensure fast movement. The process of movement involves coordination between the musculoskeletal system and nervous system. In the process of muscle contraction to enhance movement the following takes place. (Arthur Guyton, 2006)

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 muscular system is an organ system composed of roughly 650 to 850 muscles. The muscular systems consist of skeletal, smooth and cardiac muscles. The muscular system collectively works with other organ systems to permit movement, posture, conduction of heat and the circulation of blood throughout the human body.

These muscles are under control of will. These muscles are controlled by the central nervous system. i.e. Coraco brachialis muscle. This is found in the upper part of the arm and flexes the shoulder joint.

The body has many amazing systems within it. The muscular system is on of the systems that is the most intriguing. Type I, Type IIa, and Type IIb comprise the muscular fiber types within the human body. Type I or Slow-twitch fibers contain mitochondria. These mitochondria use the oxygen that is taken in to create adenosine triphosphate (ATP). ATP fuels muscle contraction. Type I fiber is considered to be aerobic due to the use of oxygen. The slow-twitch muscle fibers are also known as red fibers. This alias is due to the dark red appearance cause by the amount of myoglobin within the fiber. Slow-twitch fibers are the first within the body to be activated due to having a lower activation threshold. They create their own energy source which allows these fibers to sustain force for a longer period of time. The negative aspect is they are unable to create a large amount of force. If the fibers are unable to generate the amount of force that is needed then the fast-twitch fibers will be activated.

The mouse should be next to the keyboard so that when you use the mouse your shoulder and upper arm is as near the relaxed vertical position as possible. i.e. do not keep your arm in a stretch position.

The popliteus muscle is a minor flexor of the knee. It penetrates the joint capsule to find its origin on the lateral condyle of the femur, and passes obliquely to insert on the medio-proximal tibia. Its main function is to help stabilize the knee, but is also able to rotate the femur on the tibia to unlock the knee.

When you sit for extended periods of time, day after day, your Gluteus Maximus muscle becomes weak and inhibited.

Isometric contractions appear when there is no change in the length of the contracting muscle. This occurs when carrying an item in front of you. As the weight of the item is pulling your arms down, but your muscles are contracting to hold the items at the same level. Isokinetic contractions are really similar to isotonic, in that the muscle changes length during the contraction. Where they are different is that Isokinetic contractions produce movements of a constant speed. What you need to measure this is something called a isokinetic dynamometer. Concentric contractions are those which cause the muscle to shorten. An example is bending the elbow from straight to fully extended, causing a concentric contraction of the Bicep muscle. Eccentric

One comes to mind that added insight from today’s lesson was antagonist muscles. When we were as to rotate our bodies to one side while looking the opposite side made it difficult to execute the task of easily rolling a patient over. The neck muscles oppose or reverse the desired movement, by contracting slightly to provide some resistance. reading it in a book is one thing but seeing in action is another, and in my opinion, a better way to retain and learn a topic.

Muscles are specialised tissues which respond to nervous stimulation by contracting, which means that the muscle shortens and thickens. Muscle tissue is also elastic, which means that it can be stretched by weight, and when the weight is removed the muscle will return to its normal length.

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.

Moreover, staying in just one position for a long period ( sitting in a chair with a bright computer screen right in front of you) can make you more susceptible to neck, back, and shoulder pain. All these can even affect your performance and inadvertently limit the progress of the company.