BME 20100 Lecture 9: Compartment Syndrome
29 Jan 2019
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Document Summary
In response to a neural stimulus, skeletal muscle contracts, or thickens and shortens. Skeletal muscle is attached via connective tissue to the skeleton, and these attachments usually span joints. Therefore, contraction of skeletal muscle causes joint movement, and therefore skeletal movement. Muscle contraction that reduces the angle of this flexor surface is referred to as flexion. Muscle contraction that increases the angle of the joint flexor surface is referred to as extension. Some other synovial-related structures include bursas and tendon sheaths. A bursa is a sac formed by a synovial membrane and outer fibrous sheath (identical to a synovial joint) and is filled with synovial fluid. Bursas are typically found between bone and a tendon where there would be friction on one side of the tendon as it moves against the bone. A tendon sheath is essentially an elongated, synovial fluid-filled bursa that completely surrounds a tendon.
