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The Initiation and Sequence of Digital Joint Motion

A three-dimensional motion analysis

From the Division of Plastic and Reconstructive Surgery, University of Louisville School of Medicine, the Gait and Biomechanics Laboratory, Frazier Rehabilitation Center and the Christine M. Kleinert Institute for Hand and Micro Surgery Inc, Louisville, USA

Correspondence: A Gupta MD, Christine M. Kleinert Institute for Hand and Micro Surgery Inc, 225 Abraham Flexner Way, Suite 810, Louisville, KY 40202, USA.

We studied the initiation and sequence of digital joint motion during unrestricted flexion and extension using a 3-D motion analysis of all fingers moving simultaneously. Our results showed that motion started in a single joint in 83% of flexion and 80% of extension cycles. The DIP joint initiated flexion and extension in the index, middle, and ring fingers, but in the little finger, flexion started in the PIP joint, and extension in the MP joint. The two most frequent sequences of joint movement during flexion of the three radial fingers were DIP-PIP-MP and PIP-DIP-MP. The two most frequent sequences during extension of the three radial fingers were DIP-MP-PIP followed by DIP-MP/PIP. In the little finger, however, the most frequent sequences during flexion were PIP-DIP-MP followed by DIP-PIP-MP and during extension, DIP-MP/PIP followed by PIP/DIP-MP

Journal of Hand Surgery (British and European Volume), Vol. 23, No. 6, 792-795 (1998)
DOI: 10.1016/S0266-7681(98)80099-5


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