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Metacarpal descent, definition and normal range.

S C Tucker1, O G Titley

  • 1West Midlands Regional Unit for Plastic and Reconstructive Surgery, Wordsley Hospital, Stream Road, Stourbridge, West Midlands, UK. saratucker@doctors.org.uk

Journal of Hand Surgery (Edinburgh, Scotland)
|June 21, 2002
PubMed
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Metacarpal descent, a measure of carpometacarpal (CMC) joint mobility, was greater in women. Hand dominance affected hand angles but not CMC joint mobility in this study of 90 healthy individuals.

Area of Science:

  • Orthopedics
  • Anatomy
  • Biomechanics

Background:

  • Carpometacarpal (CMC) joint mobility is crucial for hand function.
  • Metacarpal descent is a key indicator of CMC joint mobility.
  • Understanding variations in metacarpal descent is important for clinical assessment.

Purpose of the Study:

  • To measure metacarpal descent in a cohort of normal subjects.
  • To investigate potential sex differences in metacarpal descent.
  • To explore the relationship between hand dominance and metacarpal descent.

Main Methods:

  • Ninety healthy subjects were recruited for the study.
  • Metacarpal descent was assessed by measuring the alignment of metacarpal heads.
  • Measurements were taken with the hand in a relaxed posture and in a tight fist position.

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Main Results:

  • Metacarpal descent was found to be significantly greater in women compared to men.
  • Hand dominance was associated with increased positional angles of the metacarpals.
  • Hand dominance did not show a significant association with the degree of metacarpal descent.

Conclusions:

  • Sex is a factor influencing metacarpal descent, with women exhibiting greater mobility.
  • While hand dominance affects metacarpal positioning, it does not appear to impact CMC joint mobility as measured by metacarpal descent.
  • These findings contribute to understanding normal variations in hand anatomy and biomechanics.