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In radiology, the Terry-Thomas sign is a scapholunate ligament dissociation on an anteroposterior view of the wrist. [ 1 ] [ 2 ] Most commonly a result of a fall on the outstretched hand ( FOOSH ), the scapholunate ligament ruptures resulting in separation of the lunate and scaphoid bones .
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The lunate bone (semilunar bone) is a carpal bone in the human hand. It is distinguished by its deep concavity and crescentic outline. It is situated in the center of the proximal row carpal bones, which lie between the ulna and radius and the hand. The lunate carpal bone is situated between the lateral scaphoid bone and medial triquetral bone.
The scapholunate ligament is an intraarticular ligament binding the scaphoid and lunate bones of the wrist together. It is divided into three areas, dorsal, proximal and palmar, with the dorsal segment being the strongest part. [3] It is the main stabilizer of the scaphoid. In contrast to the scapholunate ligament, the lunotriquetral ligament ...
To perform the test, the examiner grasps the wrist with their thumb over the scaphoid tubercle (volar aspect of the palm) in order to prevent the scaphoid from moving into its more vertically oriented position in ulnar deviation. For the test, the wrist needs to be in slight extension. The patient's wrist is then moved from ulnar to radial ...
Unlike spoken language, sign languages have two articulators that can move independently. [22] The more active hand is termed the dominant hand whereas the less active hand is non-dominant. [ 23 ] The active hand is the same as the signer's dominant hand , although it is possible to switch the hands' role. [ 24 ]
Sign language refers to any natural language which uses visual gestures produced by the hands and body language to express meaning. The brain's left side is the dominant side utilized for producing and understanding sign language, just as it is for speech. [1]
Carpal coalition is the abnormal fusion of two or more carpal bones when they fail to segment during intrauterine development. [1] First described by Eduard Sandifort in 1779, carpal coalitions are often an isolated issue which connect two carpal bones in the same row of the wrist. [2]