subacromial bursa

bursa /bur·sa/ (bur´sah) pl. bur´sae   [L.] a fluid-filled sac or saclike cavity situated in places in tissues where friction would otherwise occur.bur´sal

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bursa of Achilles tendon  one between the calcaneal tendon and the back of the calcaneus.

anserine bursa  one between the tendons of the sartorius, gracilis, and semitendinosus muscles, and the tibial collateral ligaments.

Calori's bursa  one between the trachea and the arch of the aorta.

Fleischmann's bursa  one beneath the tongue.

His bursa  the dilatation at the end of the archenteron.

Luschka's bursa  pharyngeal b.

omental bursa  the lesser sac of the peritoneum.

pharyngeal bursa  an inconstant blind sac located above the pharyngeal tonsil in the midline of the posterior wall of the nasopharynx; it represents persistence of an embryonic communication between the anterior tip of the notochord and the roof of the pharynx.

popliteal bursa  a prolongation of the synovial tendon sheath of the popliteus muscle outside the knee joint into the popliteal space.

prepatellar bursa  one of the bursae in front of the patella; it may be subcutaneous, subfascial, or subtendinous in location.

subacromial bursa  one between the acromion and the insertion of the supraspinatus muscle, extending between the deltoid and greater tubercle of the humerus.

Subacromial bursa (bursa subacromialis), lying between the acromion and supraspinatus tendon and extending between the deltoid and greater tubercle.

subdeltoid bursa  one between the deltoid and the shoulder joint capsule, usually connected to the subacromial bursa.

subtendinous iliac bursa  one at the point of insertion of the iliopsoas muscle into the lesser trochanter.

synovial bursa  a closed synovial sac interposed between surfaces that glide upon each other; it may be subcutaneous, submuscular, subfascial, or subtendinous in nature.

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sub·a·cro·mi·al bursa (sb-krm-l)

n.

The bursa between the acromial process and the capsule of the shoulder joint.

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subacromial bursa

Etymology: L, sub, under; Gk, akron, extremity, omos, shoulder, byrsa, wineskin

the bursa separating the acromion and deltoid muscle from the insertion of the supraspinatus muscle and the greater tubercle of the humerus.

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bursa [bur´sah] (pl. bur´sae) (L.)

a small fluid-filled sac or saclike cavity situated in places in tissues where friction would otherwise occur. adj., adj bur´sal. Bursae function to facilitate the gliding of muscles or tendons over bony or ligamentous surfaces. They are numerous and are found throughout the body; the most important are located at the shoulder, elbow, knee, and hip. Inflammation of a bursa is known as bursitis.

bursa of Fabricius an epithelial outgrowth of the cloaca in chick embryos, which develops in a manner similar to that of the thymus in mammals, atrophying after 5 or 6 months and persisting as a fibrous remnant in sexually mature birds. It contains lymphoid follicles, and before involution is a site of formation of B-lymphocytes associated with humoral immunity.

bursa muco´sa (mucous bursa) (synovial bursa) a closed synovial sac interposed between surfaces that glide upon each other; it may be subcutaneous, submuscular, subfascial, or subtendinous in location.

subacromial bursa one between the acromion and the insertion of the supraspinatus muscle, extending between the deltoid and the greater tubercle of the humerus. See illustration.

Subacromial bursa, lying between the acromion and supraspinatus tendon and extending between the deltoid and greater tubercle. From Dorland's, 2000.