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Frame-by-Frame Video Analysis of Idiosyncratic Reach-to-Grasp Movements in Humans

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Target modality affects visually guided online control of reaching.

Brendan D Cameron¹, Joan López-Moliner¹

¹Vision and Control of Action Group, Departament de Psicologia Bàsica, Universitat de Barcelona, Passeig de la Vall d'Hebron, 171, 08035 Barcelona, Catalonia, Spain; Institute for Brain, Cognition, and Behaviour (IR3C), Universitat de Barcelona, Passeig de la Vall d'Hebron, 171, 08035 Barcelona, Catalonia, Spain.

Vision Research

|July 6, 2014

Summary

Target modality influences online control during reaching movements. Reaching to visual targets relies more on visual feedback than reaching to proprioceptive targets, indicating modality-specific processing.

Keywords:

Action Online control Proprioception Reaching Vision

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Last Updated: Apr 27, 2026

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Published on: January 15, 2018

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Published on: April 16, 2014

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Published on: July 10, 2019

Area of Science:

Neuroscience
Motor Control
Human Movement Science

Background:

The brain integrates visual and proprioceptive information to guide movements.
Previous research indicates target modality affects initial reach planning.
The influence of target modality on online movement feedback processing remains unclear.

Purpose of the Study:

To investigate if target modality affects the use of online visual feedback during reaching movements.
To determine how visual feedback processing for online control differs between visual and proprioceptive targets.

Main Methods:

Participants performed reaching movements to targets defined by vision, proprioception, or both.
Visual feedback of the moving hand was manipulated (present or absent).
Online movement control was assessed by analyzing trial-to-trial variability during the reach.

Main Results:

Online control, indicated by reduced movement variability, was less influenced by visual feedback when reaching to proprioceptive targets.
Conversely, visual feedback significantly influenced online control when participants reached towards visual targets.
This suggests a reduced reliance on visual information for online control with proprioceptive targets.

Conclusions:

Target modality plays a crucial role in modulating visual processing for online movement control.
The brain adapts visual feedback utilization based on the sensory nature of the movement's goal.
These findings highlight the dynamic interplay between sensory information and motor control strategies.