Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/1648
Title: Observations in proximal interphalangeal flexion of the finger
Authors: VAN ZWIETEN, Koos Jaap 
LIPPENS, Peter 
GELAN, Jan 
ADRIAENSENS, Peter 
Thywissen, C.
Gens, F.
Issue Date: 2006
Source: 168ste Wetenschappelijke Vergadering Nederlandse Anatomen Vereniging.
Abstract: The extensor assembly of the finger, consisting of tendon fibers from extrinsic and intrinsic finger muscles, rearranged into one medial bundle and two lateral bundles, undergoes distal displacement during proximal interphalangeal flexion. The lateral bundles, conjoining distally into one terminal extensor tendon for the distal phalanx, lie slack alongside the flexed proximal interphalangeal joint (Landsmeer, 1976). The distal phalanx becomes “loose”, thus allowing simultaneous distal interphalangeal flexion. During unresisted flexion of the proximal interphalangeal joint of the finger, without simultaneous distal interphalangeal flexion, the phenomenon of the “floating distal phalanx” can be observed (Tubiana et al., 1996). To further investigate this phenomenon, morphological features of the extensor assembly in relation to the proximal interphalangeal joint were observed by means of microdissection and high resolution imaging techniques, and simulated by mathematical modelling. In the extended proximal interphalangeal joint, the position of the ligamenta collateralia propria coincides with an almost frontal plane. They thereby support the lateral bundles of the extensor assembly to maintain dorsal positions. After proximal interphalangeal flexion, these collateral ligaments show transversal positions with respect to the head of the proximal phalanx, enabling the lateral bundles of the extensor assembly to shift in palmar and distal directions during subsequent distal interphalangeal flexion. Then the lateral bundles of the extensor assembly assume more sagittal positions.
Document URI: http://hdl.handle.net/1942/1648
Category: C2
Type: Proceedings Paper
Appears in Collections:Research publications

Files in This Item:
File Description SizeFormat 
NAVprogramma6-7jan06-1.pdfPostprint275.2 kBAdobe PDFView/Open
Show full item record

Page view(s)

20
checked on May 15, 2022

Download(s)

4
checked on May 15, 2022

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.