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Hand locomotor functions, body structure, and epidermal ridge patterns: preliminary study.
D Z Loesch1, M Lafranchi, C Ruffolo
1Department of Psychology, La Trobe University, Bundoora, Victoria, Australia.
Human Biology
|October 1, 1990
Summary
Body structure and dermatoglyphics influence hand function, particularly in males. This study explores these relationships, offering insights into human evolutionary traits.
Area of Science:
- Anthropology
- Human Biology
- Genetics
Background:
- Hand function is crucial for daily activities and tool use.
- Dermatoglyphic patterns (fingerprints) and body structure are heritable traits.
- Understanding the interplay between morphology and function is key to human evolutionary studies.
Purpose of the Study:
- To investigate correlations between hand locomotor functions and dermatoglyphic characteristics.
- To examine the relationship between hand function and anthropometric measurements.
- To explore sex-based differences in these associations.
Main Methods:
- Collected data on hand grip strength (power and precision grips) from 71 adults.
- Assessed dermatoglyphic features including pattern intensity and ridge counts.
- Measured 35 anthropometric variables related to head, face, trunk, and limbs.
- Employed univariate and multivariate correlation analyses.
Main Results:
- Body and dermatoglyphic variables explained approximately 50% of hand function variance in males, significantly more than in females.
- Longitudinal body measurements and jaw length correlated with power/simple precision grips in males.
- Head, face, and specific finger dermatoglyphic patterns correlated with complex precision grips.
Conclusions:
- Identified novel sources of variation in dermatoglyphic patterns.
- Demonstrated significant links between body structure, dermatoglyphics, and hand function, especially in males.
- Provided insights into the evolutionary basis of functional and morphological traits in humans.