fascia(redirected from perineal fascia)
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Related to perineal fascia: perineal muscles
fascia(făsh`ēə), fibrous tissue network located between the skin and the underlying structure of muscle and bone. Fascia is composed of two layers, a superficial layer and a deep layer. Superficial fascia is attached to the skin and is composed of connective tissue containing varying quantities of fat. It is especially dense in the scalp, the back of the neck, and the palms of the hands, where it serves to anchor the skin firmly to underlying tissues. In other areas of the body it is loose and the skin may be moved freely back and forth. Deep fascia underlies the superficial layers, to which it is loosely joined by fibrous strands. It is thin but strong and densely packed, and serves to cover the muscles and to partition them into groups.
an architectural element in the form of a rectangular projection. Fasciae are seen at the base of columns and as part of cornices. They are not always only decorative elements. A fascia may be used to support the cross pieces forming the icon shelf of an iconostasis or to protect a wall from water seepage. In the latter case, the fascia usually slopes away from the wall, forming a stone drip.
the connective tissue investing organs, vessels, and nerves and forming the sheaths of muscles in man and other vertebrate animals; it performs supporting and trophic functions.
Superficial, or subcutaneous, fasciae are located under a fatty subcutaneous layer; in man, fasciae under the skin of the sole and the palm and under the scalp form aponeuroses. Deep fasciae invest individual muscles or muscle groups. Outgrowths of deep fasciae form intermuscular barriers, which may serve as points of muscle termination and attachment. In many parts of the body, especially in the extremities, the fascial system acts as a spring. When muscles contract, the fasciae shift their position, compressing or relaxing the neural and vascular sheaths, thus facilitating the flow of blood toward the heart. Some fasciae, such as the endothoracic fascia, line internal cavities. Fasciae are richly supplied with blood vessels and nerves.