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Updated: Jun 18, 2025

Estimation of Contact Regions Between Hands and Objects During Human Multi-Digit Grasping

Estimation of Contact Regions Between Hands and Objects During Human Multi-Digit Grasping

Published on: April 21, 2023

Tool-sensed object information effectively supports vision for multisensory grasping.

Ivan Camponogara¹, Alessandro Farnè², Robert Volcic³

¹Department of Psychology, College of Natural and Health Sciences, Zayed University.

Journal of Experimental Psychology. General

|August 5, 2024

Summary

This summary is machine-generated.

Tools enhance human sensing, enabling tool-mediated sensing that rivals hand-based sensing. This multisensory integration improves grasping actions by providing crucial object positional information, even when sensed indirectly.

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Area of Science:

Human-Computer Interaction
Neuroscience
Robotics

Background:

Tools extend human sensory capabilities beyond natural hand limits.
Tool-mediated sensing shares similarities with direct hand-based sensing.
Investigating how tools integrate with vision in object manipulation is crucial.

Purpose of the Study:

To determine if tools support vision in bimanual object manipulations.
To compare tool-mediated sensing with hand-based and visually guided grasping.
To understand the sensory information provided by tools during grasping.

Main Methods:

Experiment 1: Compared grasping with tools, contralateral hands, and visual guidance.
Measured reaction time, peak velocity, and peak grip aperture.
Experiments 2 & 3: Excluded force exertion and identified positional information as key.

Main Results:

Actions initiated earlier and with smaller grip aperture when using tools or contralateral hands.
Tool-mediated sensing significantly supported vision, similar to hand-based sensing.
Object positional information from tools was key for multisensory advantage.

Conclusions:

Multisensory integration, even with indirect tool sensing, enhances grasping actions.
Tool-mediated sensing effectively supports vision, improving fine-tuning of movements.
Findings highlight the brain's ability to integrate diverse sensory inputs for motor control.