. The anatomy of the human body. Human anatomy; Anatomy. ARTICULATIONS OF THE CARPUS. 147 the direction of the long diameter of the articular surfaces, dislocation must be very dif- ficult, and that, when it does occur, it must be incomplete. The movement of circumduction is nothing more than a succession of the ditTer^nt mo- tions which have been already pointed out. The hand describes a cone, of greater ex- tent behind, that is, in the direction of extension, than in front, or in the direction of flexion. It is also still more restricted in adduction and abduction. Articulations of the Carpu
. The anatomy of the human body. Human anatomy; Anatomy. ARTICULATIONS OF THE CARPUS. 147 the direction of the long diameter of the articular surfaces, dislocation must be very dif- ficult, and that, when it does occur, it must be incomplete. The movement of circumduction is nothing more than a succession of the ditTer^nt mo- tions which have been already pointed out. The hand describes a cone, of greater ex- tent behind, that is, in the direction of extension, than in front, or in the direction of flexion. It is also still more restricted in adduction and abduction. Articulations of the Carpus {figs. 73 to 75). These articulations comprise, 1. The articulations of the bones of each row together; and, 2. The articulations of the two rows. Articulations of the Bones of each Row. PreparaHon.—1. Remove the extensor and the flexor tendons ; 2. Separate the hand from the forearm, then the first row from the second, and, lastly, the bones of both rows from each other, examining their means of union before completing the separation. Artkul&r Surfaces.—The articulations of the bones of each row are amphi-artkroses, and, consequently, present one part continuous and another contiguous. The bones of' the first row correspond to each other by oblique surfaces, those of the second row by vertical and more extensive surfaces. Mean^ of Union.—Two classes of ligaments belong to these joints : the one is extend- ed between the corresponding surfaces, the interosseous ligaments; the other set are peripheral, and are divided into palmar and dorsal. The palmar and dorsal ligaments are fibrous bundles, stretched transversely or oblique- ly from each of the bones of the carpus to those which are contiguous to it. The dorsal are much thinner than the palmar. The interosseous ligaments are not disposed in an exactly similar manner in the two Fig. rows, and we shall, therefore, examine them separate- ly. 1. The interosseous ligaments of the first row (e e, fig. 73) occupy on
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