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Related Concept Videos

Visual Agnosia01:12

Visual Agnosia

Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round end"...
Perceptual Constancy01:12

Perceptual Constancy

Perceptual constancy is the ability to recognize that objects remain consistent and unchanged even when their appearance varies due to changes in sensory input. There are four main types of perceptual constancy: size constancy, shape constancy, color constancy, and brightness constancy.
Size constancy is the recognition that an object remains the same size, even when its image on the retina changes. For instance, a bus is perceived to be large enough to carry people, even if it looks tiny from...

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Related Experiment Video

Updated: Jun 27, 2026

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior
09:49

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior

Published on: April 16, 2014

Sustained interactions between perception and action in visual extinction and neglect: evidence from sequential

Keiko Kitadono1, Glyn W Humphreys

  • 1Behavioural Brain Sciences, School of Psychology, University of Birmingham, Birmingham, UK. k.kitadono@bham.ac.uk

Neuropsychologia
|December 9, 2008
PubMed
Summary

Action programming can improve awareness of stimuli on the neglected side of space. Motor feedback influences early visual coding, helping patients overcome visual neglect even when attention must shift.

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Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
06:46

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Published on: March 18, 2019

Related Experiment Videos

Last Updated: Jun 27, 2026

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior
09:49

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior

Published on: April 16, 2014

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
06:46

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Published on: March 18, 2019

Area of Science:

  • Cognitive Neuroscience
  • Neuroscience
  • Psychology

Background:

  • Spatial neglect and extinction are deficits in awareness of stimuli.
  • Perception and action are known to interact, but the precise mechanisms are not fully understood.
  • Motor programming's effect on these deficits requires further investigation.

Purpose of the Study:

  • To investigate how action programming affects spatial neglect and extinction.
  • To examine the role of sequential motor programming when attention is initially directed ipsilesionally.
  • To elucidate the interaction between perception and action in overcoming visual awareness deficits.

Main Methods:

  • Assessing the effects of action programming on extinction and neglect.
  • Implementing sequential motor programming with initial attention to ipsilesional stimuli.
  • Comparing contralesional stimulus report after programming a second action versus only pointing to the ipsilesional side.

Main Results:

  • Programming a second action to the contralesional side reduced spatial deficits in reporting.
  • Report of contralesional stimuli improved, while ipsilesional stimulus report decreased.
  • Motor programming demonstrated effectiveness even when attention disengagement from the ipsilesional side was required.

Conclusions:

  • Perception and action interact via motor feedback to early visual coding.
  • Motor programming can help overcome lack of visual awareness to contralesional stimuli.
  • Motor programming decreases ipsilesional capture and influences perception, even with attention shifts.