Color Atlas of Human Anatomy
Vol. 1: Locomotor System
Bearbeitet von Werner Platzer
6. durchges. Auflage 2008. Buch. ca. 480 S. ISBN 978 3 13 533306 9
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Radiocarpal and Midcarpal Joints Ligaments in the Region of the Wrist (A–E) (A–E) Four groups of ligaments can be distin- The radiocarpal or wrist joint is an ellip- guished: soid joint formed on one side by the radius (1) and the articular disk (2) and on the Ligaments which unite the forearm bones with other by the proximal row of carpal bones.Not the carpal bones (violet). These include the all the carpal bones of the proximal row are ulnar collateral ligament (8), the radial col- in continual contact with the socket- lateral ligament (9), the palmar radiocarpal shaped articular facet of the radius and the ligament (10), the dorsal radiocarpal liga- disk. The triquetrum (3), only makes close ment (11), and the palmar ulnocarpal liga- contact with the disk during ulnar abduc- ment (12). tion and loses contact on radial abduction. Ligaments which unite the carpal bones with The capsule of the wrist joint is lax, dorsally one another,orintercarpal ligaments (red). These comprise the radiate carpal ligament Upper Limb relatively thin, and is reinforced by numer- ous ligaments. The joint space is un- (13), the pisohamate ligament (14), and the branched and sometimes contains synovial palmar intercarpal (15), dorsal intercarpal folds. Often the wrist joint is in continuity (16), and interosseous intercarpal ligaments with the midcarpal joint. (4). Ligaments between the carpal and metacarpal The midcarpal joint is formed by the proxi- bones,orcarpometacarpal ligaments (blue). mal and distal row of carpal bones and has an To this group belongs the pisometacarpal S-shaped joint space. Each row of carpal ligament (17), the palmar carpometacarpal bones can be considered as a single articu- ligaments (18), and the dorsal carpometa- lar body, and they interlock with each carpal ligaments (19). other. Although there is a certain limited Ligaments between the metacarpal bones,or degree of mobility between members of metacarpal ligaments (yellow). These are or- the proximal row of carpal bones, this is ganized into dorsal (20), interosseous (21), not true of the distal row because they are and palmar (22) metacarpal ligaments. joined one to another (4), as well as to the metacarpal bones by strong ligaments. Almost all of these ligaments strengthen Thus, the distal row of carpal bones and the the joint capsules and partly guide the metacarpals form a functional entity. movements of the joints of hand.
The joint capsule is tense on the palmar sur- The joints between the carpal bones of a face and lax dorsally. The joint space is row are designated as intercarpal joints. branched and has connections with the Only the joint between the triquetrum and radiocarpal joint, and around the the pisiform, the pisiform joint deserves trapezium (5) and trapezoid (6) there are special attention. also connections with adjacent carpometa- carpal joints. Clinical tip: Several more ligaments are de- Sometimes the joint space contains scribed in hand surgery. They are important in numerous synovial folds (7). The space be- cases of surgical intervention. tween the lunate and triquetrum and the capitate and hamate is padded by synovial folds which may be visible in radiographs.
aus: Platzer, Locomotor System (ISBN 9783135333069), ᮊ 2009 Georg Thieme Verlag KG u:Pazr oooo ytm(SN9783135333069), (ISBN System Locomotor Platzer, aus: A C 8 7 2 dorsal surface dorsal Ligaments of rightwrist, dorsal view dorsal throughright wrist, Section 20 16 3 19 12 121 21 21 21 20 16 3 4 11 19 16 1 4 20 19 6 9 1 5 15 7 B E D palmar surface Ligaments of rightwrist, of right wrist,palmar surface Diagram of ligaments of surface rightwrist,dorsal Diagram of ligaments 9 aicra n icra Joints Midcarpal and Radiocarpal ᮊ 10 10 09GogTim elgKG Verlag Thieme Georg 2009 1 13 22 18 13 12 22 14 22 17 8 131 Upper Limb