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An Objective and Child-friendly Assessment of Arm Function by Using a 3-D Sensor
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Published on: February 12, 2018

Patterns of hand variation--new data on a Sardinian sample.

Roberto Buffa1, Elisabetta Marini, Stefano Cabras

  • 1Department of Experimental Biology, Anthropological Science Section, University of Cagliari, Cagliari, Italy.

Collegium Antropologicum
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PubMed
Summary

Human hand morphology varies primarily with size. Sexual dimorphism is evident, with men exhibiting larger dimensions and a relatively longer thumb compared to women, indicating distinct patterns in hand anthropometry.

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Area of Science:

  • Anthropometry
  • Human Morphology
  • Biological Variation

Background:

  • Understanding human hand variation is crucial in fields like forensics and ergonomics.
  • Previous studies have explored hand anthropometry, but detailed analysis of metric characters across fingers and phalanges, including sexual dimorphism, requires further investigation.

Purpose of the Study:

  • To analyze patterns of variation in metric characters of the human hand, including palm, fingers, and distal phalanges.
  • To investigate sexual dimorphism in hand dimensions and proportions among Sardinian adults.

Main Methods:

  • Anthropometric measurements of palm, fingers, and distal phalanges were taken from 146 Sardinian individuals (men and women).
  • Inferential statistics (paired Student's t test, ANOVA) and Principal Components Analysis were employed for data analysis.

Main Results:

  • Size factors were identified as the principal source of variation in hand morphology.
  • A residual component of variability was observed between fingers, distal phalanges, and the thumb versus other fingers.
  • Significant sexual dimorphism was found, with men displaying greater overall dimensions and a proportionally longer thumb than women.

Conclusions:

  • Hand morphology variation is largely driven by size, with specific patterns differentiating finger groups and thumb proportions.
  • Sexual dimorphism in hand anthropometry is clearly demonstrated, highlighting differences in size and thumb length between men and women.