Skeletal muscle structure and function

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skeletal muscle structure and function

Skeletal Muscle Structure, Function, and Plasticity by Richard L. Lieber

In its Third Edition, this text addresses basic and applied physiological properties of skeletal muscle in the context of the physiological effects from clinical treatment. Anyone interested in human movement analysis and the understanding of generation and control from the musculoskeletal and neuromuscular systems in implementing movement will find this a valuable resource. A highlight color has been added to this editions updated figures and tables, and the color plates section has been doubled, ensuring that all figures that need color treatment to clarify concepts receive this treatment. A new Clinical Problem feature uses concepts presented in each chapter in the context of a specific clinical case—for example, a spinal cord injury, a sports accident, or rehabilitation after bed rest.
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Muscle Contraction Process [HD Animation]

Skeletal muscle structure and function. The muscle system is responsible for movement of the human body, posture, movement of substances inside the body .
Richard L. Lieber

Skeletal Muscle; Structure, Function, and Repair

A whole skeletal muscle is considered an organ of the muscular system. Each organ or muscle consists of skeletal muscle tissue , connective tissue , nerve tissue , and blood or vascular tissue. Skeletal muscles vary considerably in size, shape, and arrangement of fibers. They range from extremely tiny strands such as the stapedium muscle of the middle ear to large masses such as the muscles of the thigh. Some skeletal muscles are broad in shape and some narrow. In some muscles the fibers are parallel to the long axis of the muscle; in some they converge to a narrow attachment; and in some they are oblique. Each skeletal muscle fiber is a single cylindrical muscle cell.

Principles of Molecular Medicine pp Cite as. This chapter summarizes the basic organization of skeletal muscle. Skeletal muscle is responsible for all voluntary movement, and its unique organization is optimized for this function. The sarcomere is the unit of muscle contraction and the sarcomere is linked to the plasma membrane through the Z band. Skeletal muscle is also unique in that mature myofibers are a multinucleate syncytium.

The best-known feature of skeletal muscle is its ability to contract and cause movement. Skeletal muscles act not only to produce movement but also to stop movement, such as resisting gravity to maintain posture. Small, constant adjustments of the skeletal muscles are needed to hold a body upright or balanced in any position.
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Skeletal muscle is one of three major muscle types, the others being cardiac muscle and smooth muscle. It is a form of striated muscle tissue , which is under the voluntary control of the somatic nervous system. A skeletal muscle refers to multiple bundles fascicles of cells joined together called muscle fibers. The fibers and muscles are surrounded by connective tissue layers called fasciae. Muscle fibers, or muscle cells , are formed from the fusion of developmental myoblasts in a process known as myogenesis. Muscle fibers are cylindrical and have more than one nucleus.

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