subacromial bursa(redirected from bursa subacromialis)
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.
between the acromion and the capsule of the shoulder joint.
Synonym(s): bursa subacromialis [TA]
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.
sub·a·cro·mi·al bur·sa(sŭb'ă-krō'mē-ăl bŭr'să) [TA]
Area between the acromion and the capsule of the shoulder joint.