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Depth Perception and Spatial Vision01:15

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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.

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Assessing Human Spatial Navigation in a Virtual Space and its Sensitivity to Exercise
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Published on: January 26, 2024

Low arousal modulates visuospatial attention in three-dimensional virtual space.

Ines A Heber1, Jakob T Valvoda, Torsten Kuhlen

  • 1Department of Neurology-Section Neuropsychology, University Hospital RWTH Aachen, Aachen, Germany. heber@neuropsych.rwth-aachen.de

Journal of the International Neuropsychological Society : JINS
|February 20, 2008
PubMed
Summary

Sleep deprivation impairs visuospatial attention, significantly slowing reorientation in extrapersonal space. This highlights the crucial role of arousal in modulating attention, especially in the right hemisphere.

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Published on: January 23, 2017

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Sleep Research

Background:

  • Clinical, experimental, and functional imaging studies suggest overlapping neuronal networks and functional interactions of alertness and visuospatial attention within the right hemisphere.
  • The interplay between arousal and visuospatial attention remains an area of active investigation.

Purpose of the Study:

  • To examine the interaction of arousal and visuospatial attention in peripersonal and extrapersonal virtual space.
  • To investigate the effects of prolonged sleep deprivation on attentional processes.

Main Methods:

  • Twenty healthy male adults participated in the study.
  • Participants underwent 24 hours of sleep deprivation.
  • Visuospatial attention was assessed at four time points during sleep deprivation (9 p.m., 1 a.m., 5 a.m., and 9 a.m.) using a virtual environment.

Main Results:

  • A highly significant slowing of reorientation toward the left visual hemifield in extrapersonal space was observed.
  • This slowing was directly attributed to decreased arousal levels during sleep deprivation.
  • Visuospatial attention in extrapersonal space was found to be modulated by the level of arousal.

Conclusions:

  • The findings provide additional evidence for the proposed anatomical and functional overlap of alertness and visuospatial attention systems.
  • Arousal significantly modulates visuospatial attention, particularly in extrapersonal space.
  • Sleep deprivation negatively impacts attentional control, demonstrating a clear link between arousal and cognitive performance.