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The ring metacarpal is somewhat more mobile while the fifth metacarpal is semi-independent. [ 1 ] Each metacarpal bone consists of a body or shaft, and two extremities; the head at the distal or digital end (near the fingers), and the base at the proximal or carpal end (close to the wrist).
stroking dorsal radial skin, with forearm in supination, elicits wrist and finger flexion Bekhterev–Mendel reflex: Vladimir Bekhterev, Kurt Mendel: neurology: pyramidal tract lesions: toe flexion on percussion of dorsum of foot Bence Jones protein: Henry Bence Jones: hematology: multiple myeloma: Benedict solution: Stanley Rossiter Benedict ...
In human anatomy, the radial (RCL) and ulnar (UCL) collateral ligaments of the metacarpophalangeal joints (MCP) of the hand are the primary stabilisers of the MCP joints. [1] A collateral ligament flanks each MCP joint - one on either side. Each attaches proximally at the head of the metacarpal bone, and distally at the base of the phalynx.
The fourth metacarpal bone (metacarpal bone of the ring finger) is shorter and smaller than the third. The base is small and quadrilateral; its superior surface presents two facets, a large one medially for articulation with the hamate , and a small one laterally for the capitate .
The third metacarpal bone (metacarpal bone of the middle finger) is a little smaller than the second.. The dorsal aspect of its base presents on its radial side a pyramidal eminence, the styloid process, which extends upward behind the capitate; immediately distal to this is a rough surface for the attachment of the extensor carpi radialis brevis muscle.
The head of the radius is wider than the bone's neck, and, because the annular ligament embraces both, the radial head is "trapped" inside the ligament which thus acts to prevent distal displacement of the radius. [4] It helps to stabilise the proximal radial head, [6] and the radioulnar joint. [7]
Bamboo sign; Banana sign; Bat wing appearance; Bear paw sign; Beveled edge sign; Bird of prey sign; Bite sign; Black pleura sign; Blade of grass sign (also known as Flame sign); Blumensaat's line
fracture at the neck of the fifth metacarpal: punching solid object: Boxer's fracture at Wheeless' Textbook of Orthopaedics online Bumper fracture: Car bumper: compression fracture of lateral tibial plateau: forced valgus of knee when struck from side by car bumper: Bumper fracture at TheFreeDictionary.com: Chance fracture: George Quentin Chance