Fibrous flexor sheath, synovial flexor sheath of hand fingers, vincula longa and vincula brevia скачать в хорошем качестве

Fibrous flexor sheath, synovial flexor sheath of hand fingers, vincula longa and vincula brevia

The common synovial sheath for the flexor tendons or the ulnar bursa is a synovial sheath in the carpal tunnel of the human hand. It contains tendons of the flexor digitorum superficialis and the flexor digitorum profundus, but not the flexor pollicis longus. The sheath which surrounds the flexor digitorum extends downward about halfway along the metacarpal bones, where it ends in blind diverticula around the tendons to the index, middle, and ring fingers. It is prolonged on the tendons to the little finger and usually communicates with the mucous sheath of these tendons. A synovial sheath is one of the two membranes of a tendon sheath which covers a tendon. The other membrane is the outer fibrous tendon sheath. The tendon invaginates the synovial sheath from one side so that the tendon is suspended from the membrane by the mesotendon, through which the blood vessels reach the tendon, in places where the range of movement is extensive. The mesotendon disappears or remains in the form of narrow tendinous bands as threads known as vincula tendina (vincula longa and vincula brevia). The synovial sheath is found where the tendon passes under ligaments and through osseofibrous tunnels; their function is to reduce friction between the tendon and their surrounding structure. An example is the common synovial sheath for the flexor tendons of the hand. Tags:. fibrous flexor sheath and #synovial sheath fibrous #flexor #sheath #anatomy flexor sheath infection fibrous flexor sheath of fingers