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The interphalangeal articulations of the hand are the hinge joints between the phalanges of the hand (i.e. the finger bones). There are two sets (except in the thumb): * "proximal interphalangeal joints" (PIJ or PIP), those between the first (also called proximal) and second (intermediate) phalanges * "distal interphalangeal joints" (DIJ or DIP), those between the second and third (distal) phalanges Anatomically, the proximal and distal interphalangeal articulations are very similar. There are some minor differences in how the volar plates are attached proximally and in the segmentation of the flexor tendon sheath, but the major differences are the smaller dimension and reduced mobility of the distal joint. ==Joint structure== The PIP joint exhibits great lateral stability. Its transverse diameter is greater than its antero-posterior diameter and its thick collateral ligaments are tight in all positions during flexion, contrary to those in the metacarpophalangeal joint.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Interphalangeal articulations of hand」の詳細全文を読む スポンサード リンク
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