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Location of the accessory ossicles of the carpals. Occasionally accessory bones are found in the carpus, but of more than 20 such described bones, only four (the central, styloid, secondary trapezoid, and secondary pisiform bones) are considered to be proven accessory bones. Sometimes the scaphoid, triquetrum, and pisiform bones are divided ...
In human anatomy, the wrist is variously defined as (1) the carpus or carpal bones, the complex of eight bones forming the proximal skeletal segment of the hand; [1] [2] (2) the wrist joint or radiocarpal joint, the joint between the radius and the carpus [2] and; (3) the anatomical region surrounding the carpus including the distal parts of the bones of the forearm and the proximal parts of ...
The capitate bone is a bone in the human wrist found in the center of the carpal bone region, located at the distal end of the radius and ulna bones. It articulates with the third metacarpal bone (the middle finger) and forms the third carpometacarpal joint. The capitate bone is the largest of the carpal bones in the human hand.
The carpus and tarsus of land vertebrates primitively had three rows of carpal or tarsal bones. Often, some of these have become lost or fused in evolution.. Accessory bones amidst tarsals
Joints of the hand, X-ray. The bones in each carpal row interlock with each other and each row can therefore be considered a single joint. In the proximal row a limited degree of mobility is possible, but the bones of the distal row are connected to each other and to the metacarpal bones by strong ligaments that make this row and the metacarpus a functional entity.
The narrowest section of the tunnel is located a centimetre beyond the mid-line of the distal row of carpal bones where the sectional area is limited to 1.6 cm 2. [2] The tendons of the flexor digitorum superficialis and profundus pass through a common ulnar sheath, while the tendon of the flexor pollicis longus passes through a separate radial ...
Carpals. Scaphoid bone (2) Lunate bone (2) Triquetral bone (2) Pisiform bone (2) Trapezium (2) Trapezoid bone (2) Capitate bone (2) Hamate bone (2) Metacarpals (10 bones in total; 5 on each side) Phalanges of the hand (28 bones in total, 14 on each hand) Proximal phalanges (10 bones in total; 5 on each side) Intermediate phalanges (8 bones in ...
The lunate is a crescent-shaped carpal bone found within the hand.The lunate is found within the proximal row of carpal bones. Proximally, it abuts the radius.Laterally, it articulates with the scaphoid bone, medially with the triquetral bone, and distally with the capitate bone.