Related Experiment Video
Updated: May 13, 2026

09:49
Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior
Published on: April 16, 2014
The utility of vision during action: multiple visuomotor processes?
Luc Tremblay1, Steve Hansen, Andrew Kennedy
1Faculty of Kinesiology and Physical Education, University of Toronto, Toronto, Ontario, Canada. luc.tremblay@utoronto.ca
Journal of Motor Behavior
|February 28, 2013
Summary
Vision during movement helps control, with different speeds aiding distinct processes. Impulse control benefits from vision up to 0.9 m/s, while limb-target regulation improves with vision up to 1.1 m/s.
Area of Science:
- Motor control
- Human movement science
- Visuomotor processes
Background:
- The control phase of movement involves distinct processes like impulse and limb-target regulation.
- Previous research suggests these visuomotor processes may operate under different constraints.
Purpose of the Study:
- To provide empirical evidence supporting the segregation of movement control into distinct processes.
- To determine the velocity-dependent constraints governing impulse and limb-target regulation.
Main Methods:
- Two experiments were conducted involving visuomotor tasks.
- Vision availability was manipulated based on limb velocity criteria (above or below thresholds).
Main Results:
- Vision provided between 0.8 and 0.9 m/s significantly enhanced impulse regulation.
- Vision provided up to 1.1 m/s significantly improved limb-target regulation.
Conclusions:
- The findings support the hypothesis that impulse regulation and limb-target regulation are distinct processes.
- These processes can occur at different limb velocities during a single movement, influenced by visual feedback.
Related Concept Videos
Parallel Processing
The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
Vision
Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
Visual System
Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
Once through the pupil, the light passes through the lens, a...
Depth Perception and Spatial Vision
Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
Motor and Sensory Areas of the Cortex
The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex.
Muscle Coordination and Action
Muscle coordination is a complex and finely tuned process essential for smooth and purposeful movements like flexion, extension, adduction, abduction, and rotation. The human body orchestrates the actions of various muscles working in concert, each with a specific role. Four functional types describe how muscles work together: agonist, antagonist, synergist, and fixator.
Agonists
Agonist muscles, often called prime movers, are the primary muscles responsible for producing a specific movement.
Agonists
Agonist muscles, often called prime movers, are the primary muscles responsible for producing a specific movement.

