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The ulna and radius are parallel bones of the antebrachium or the forearm. The ulna lies medially and consists of a bony tip called the olecranon process at its proximal end. This hook-like projection articulates with the olecranon fossa of the humerus and forms the "hinged" ulnohumeral part of the elbow joint. This joint facilitates forearm extension and flexion while preventing its hyperextension. Similarly, the coronoid process, another bony projection on the proximal/anterior side...
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Hand Function in Adults with Radial Longitudinal Deficiency.

Anna Gerber Ekblom1, Lars B Dahlin2, Hans-Eric Rosberg2

  • 1Department of Clinical Science and Education, Sections of Hand Surgery (A.G.E. and M.A.) and Radiology (M.W.), Karolinska Institutet, Södersjukhuset, SE-118 83, Stockholm, Sweden. E-mail address for A.G. Ekblom: anna.gerber.ekblom@ki.se. E-mail address for M. Werner: michael.werner@sodersjukhuset.se. E-mail address for M. Arner: Marianne.arner@sodersjukhuset.se.

The Journal of Bone and Joint Surgery. American Volume
|July 18, 2014
PubMed
Summary
This summary is machine-generated.

In adults with radial longitudinal deficiency, grip strength, key pinch, and forearm and digital motion are more critical for activity and participation than wrist angulation. This study highlights key factors influencing functional outcomes.

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Area of Science:

  • Orthopedics
  • Rehabilitation Medicine
  • Biomedical Engineering

Background:

  • Radial longitudinal deficiency (RLD) presents functional impairments affecting daily activities.
  • Factors like forearm length, wrist deviation, thumb function, and grip strength are known contributors to impairment.
  • The relationship between these factors and actual activity/participation levels in adults with RLD remains unclear.

Purpose of the Study:

  • To investigate the correlation between body function/structure and activity/participation in adults with RLD.
  • To identify which specific physical parameters are most influential on functional outcomes in RLD patients.

Main Methods:

  • Twenty adults (18-60 years) with Bayne type II-V RLD were assessed.
  • Evaluated body function/structure (ROM, grip strength, pinch, sensibility, radiographs).
  • Assessed activity (Box and Block Test, Sollerman test) and participation (QuickDASH, SF-12).

Main Results:

  • Adults with RLD demonstrated significantly reduced wrist/digit motion, grip strength, and key pinch compared to norms.
  • Strong correlations found between activity measures (Box and Block, Sollerman) and grip strength, key pinch, and digital/elbow motion.
  • Participation measures (QuickDASH, SF-12 PCS/MCS) correlated with forearm length, elbow/digital motion, and grip strength.

Conclusions:

  • Grip strength, key pinch, forearm length, and elbow/digital motion are more significant predictors of activity and participation in adults with RLD.
  • Radial angulation of the wrist appears less critical for functional outcomes compared to other physical parameters.
  • Findings can inform targeted rehabilitation strategies for individuals with RLD.