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An anatomic study on the junctura tendinum in the 4th intermetacarpal space and its clinical implication
Author(s) -
Jeon InHo,
Seok JoonHo,
Park IlHyung,
Choi JinWon,
Min WooKie,
Kwon DongSoo,
Kim HyoJin,
Kim PoongTaek
Publication year - 2010
Publication title -
clinical anatomy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 71
eISSN - 1098-2353
pISSN - 0897-3806
DOI - 10.1002/ca.20878
Subject(s) - medicine , middle finger , subluxation , little finger , wrist , anatomy , tendon , dorsum , cadaveric spasm , phalanx , elbow , trigger finger , ring finger , index finger , surgery , thumb , pathology , biochemistry , chemistry , alternative medicine , gene
We report results of anatomic study in the fourth intermetacarpal space, focusing on the pattern of junctura tendinum and variations of extensor tendons of the little finger with its clinical implication on snapping of the little finger. Fifty unpaired cadaveric hands were dissected from the wrist to the middle phalanx of the ring and little fingers. The type of junctura tendinum was judged based on Von Schroder's classification and the relationship with EDC were recorded. EDC to the little finger and EDM were dissected and the numbers were recorded. Forty six hands (92%) exhibited a junctura tendinum in the fourth intermetacarpal space and it was Type III in 42 hands (84%). The EDC‐little finger was absent in 76% (38 of 50 hands). When present, EDC‐little finger originated most commonly as single thin tendon. The absence of an EDC‐little finger was associated with increased incidence of Type III junctura tendinum (37 of 38 hands). An EDM was present in all 50 hands running from the fifth dorsal compartment. Based on these clinical and anatomic studies, we considered that the snapping of the little finger is more likely subluxation of junctura tendinum rather than subluxation/dislocation of EDC of the little finger. Clin. Anat. 23:56–60, 2010. © 2009 Wiley‐Liss, Inc.