0 a sac (= part of the body like a bag) that is filled with fluid and protects tissue from injury due to friction --
These affections are characterised by an effusion of fluid into the sac of the bursa with thickening of its lining membrane.
The sub-deltoid or sub-acromial bursa, which usually presents a single cavity and does not normally communicate with the shoulder-joint, is indispensable in abduction and rotation of the humerus.
The bursa underneath the tendon of the subscapularis muscle when inflamed causes alteration in the attitude of the shoulder and impairment of its movements.
Swelling of the tissues contiguous to the bursa is present and pain is evinced upon manipulation of the parts.
A synovial bursa is situated underneath the tendinous attachment of the posterior portion of the triceps brachii—the long head or caput magnum.
