. Cunningham's Text-book of anatomy. Anatomy. 302 THE ARTICULATIONS OR JOINTS. bones forming such a joint. Ligaments have therefore additional importance in this group, for not only do they constitute the uniting media which bind the articulating bones together, but, to a large extent, they form the peripheral boundary of the joint cavity, although not equally developed in all positions. Thus, every diarthrodial joint possesses a fibrous or ligamentous envelope con- stituting the fibrous stratum of the articular capsule, which is attached to the ad- jacent ends of the articulating bones. For s
. Cunningham's Text-book of anatomy. Anatomy. 302 THE ARTICULATIONS OR JOINTS. bones forming such a joint. Ligaments have therefore additional importance in this group, for not only do they constitute the uniting media which bind the articulating bones together, but, to a large extent, they form the peripheral boundary of the joint cavity, although not equally developed in all positions. Thus, every diarthrodial joint possesses a fibrous or ligamentous envelope con- stituting the fibrous stratum of the articular capsule, which is attached to the ad- jacent ends of the articulating bones. For special purposes, particular parts of the fibrous stratum may undergo enlargement and thickening, and so constitute strong ligamentous bands," although still forming continuous constituents of the envelope. The fibrous stratum is lined by a stratum synoviale ( synovial membrane), the two strata constituting the capsula articularis. The synovial stratum is con- tinued from the inner surface of the fibrous stratum to the surface of the intra- articular portion of each articulating bone. The part of the bone included within the joint consists of a " non-articular " portion covered by the synovial layer and an " articular " portion covered by encrusting hyaline cartilage. The latter provides the surface which comes into apposition with the corresponding area of another bone. In its general disposition the synovial layer may be likened to a cylindrical tube open at each end. This layer is richly supplied by a close network of vessels and nerves. Certain diarthroses present intracapsular structures which may be distinguished as interarticular ligaments and articular discs and menisci ( interarticular fibro-cartilages). Ligamenta Interarticularia.—Interarticular ligaments extend between, and are attached to, non-articular areas of the intracapsular portions of the articulating bones. They usually occupy the long axis of the joint, and occasionally the
Size: 1677px × 1490px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1914
