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Related Concept Videos

Depth Perception and Spatial Vision01:15

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.
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Somatosensation

The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.

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Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments
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Published on: January 23, 2017

Spatial attention modulates tactile change detection.

Lore Van Hulle1, Stefaan Van Damme, Charles Spence

  • 1Department of Experimental-Clinical and Health Psychology, Ghent University, Henri Dunantlaan 2, 9000 Ghent, Belgium. lore.vanhulle@ugent.be

Experimental Brain Research
|October 31, 2012
PubMed
Summary
This summary is machine-generated.

Focusing attention on a specific body location improves the detection of tactile pattern changes. This study shows that directed attention enhances tactile change detection, aiding research into attentional focus.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Sensory Perception

Background:

  • Tactile change blindness describes the difficulty in detecting alterations between sequential tactile patterns.
  • Understanding the role of attention in tactile perception is crucial for explaining sensory processing.
  • Existing research highlights attentional effects in visual and auditory domains, but less so in the tactile sense.

Purpose of the Study:

  • To investigate if directing endogenous attention to a specific body location enhances the detection of changes in tactile patterns.
  • To determine the extent to which attention modulates tactile change detection accuracy.
  • To establish a paradigm for studying altered attentional focus in clinical populations.

Main Methods:

  • Two experiments were conducted with 55 participants detecting changes between consecutively presented tactile patterns.
  • Tactile patterns involved stimulation of specific body sites.
  • Endogenous attention was manipulated by instructing participants about likely locations of change, comparing attended vs. unattended locations.

Main Results:

  • Participants demonstrated significantly higher accuracy in detecting tactile changes at attended body locations compared to unattended ones.
  • This finding confirms that attention plays a critical role in modulating the detection of tactile pattern alterations.
  • The results provide empirical evidence for the influence of voluntary attention on tactile sensory processing.

Conclusions:

  • Directed attention effectively enhances the detection of changes in tactile stimuli.
  • This research validates a paradigm for exploring hypervigilance or excessive attentional focus in tactile perception within clinical contexts.
  • The findings contribute to understanding the interplay between attention and somatosensory processing.