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Updated: Jan 24, 2026
12:18
An Instrumented Pull Test to Characterize Postural Responses
Published on: April 6, 2019
11.4K
The standard posture of the hand
Daniele Romano1, Luigi Tamè2, Elena Amoruso1
1Department of Psychology.
Summary
The human body may have a preferred posture for efficient environmental interaction. This study found the thumb is associated with low positions, while other fingers are linked to higher positions, suggesting a standard hand posture.
Area of Science:
- Neuroscience
- Human sensorimotor control
- Body representation
Background:
- Perceived limb position integrates sensory signals and motor commands.
- A standard body posture representation may bias limb position perception toward stereotyped configurations.
- Prior research indicates efficient tactile processing in specific limb positions, hinting at preferred postures.
Purpose of the Study:
- To map the standard posture of the entire hand by analyzing spatial associations between all five digits.
- To investigate if this observed posture is an artifact of intermanual integration.
Main Methods:
- Characterized spatial associations of all five digits to define a standard hand posture.
- Designed experiments to rule out intermanual integration as a confounding factor.
Main Results:
- The thumb is preferentially associated with low spatial locations.
- The index, middle, ring, and little fingers are associated with upper spatial locations.
- The observed hand posture effect is independent of intermanual integration.
Conclusions:
- The findings suggest a stereotyped hand posture that may optimize environmental interaction.
- This standard posture biases the perception of limb position, with the thumb favoring lower positions and other fingers favoring higher ones.
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