Spatial processing of touch in sighted and congenitally blind humans
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منابع مشابه
Task demands affect spatial reference frame weighting during tactile localization in sighted and congenitally blind adults
Task demands modulate tactile localization in sighted humans, presumably through weight adjustments in the spatial integration of anatomical, skin-based, and external, posture-based information. In contrast, previous studies have suggested that congenitally blind humans, by default, refrain from automatic spatial integration and localize touch using only skin-based information. Here, sighted an...
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Changes in limb posture (such as crossing the hands) can impair people's performance in tasks such as those involving temporal order judgements, when one tactile stimulus is presented to either hand. This crossed hands deficit has been attributed to a conflict between externally and anatomically anchored reference systems when people localize tactile stimuli. Interestingly, however, the perform...
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The principles of cross-modal integration were investigated with an auditory-tactile illusion in sighted and congenitally blind adults. Participants had to judge the number of rapidly presented tactile stimuli, which were presented together with task-irrelevant sounds. When one tactile stimulus was accompanied by more than one tone, participants reported perceiving more than a single touch. Thi...
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Although there is consistent evidence for a deficit in the manipulation and internal representation of space and spatially located objects by the congenitally blind (e.g. Heller, 1989), explanations for this deficit are disputed. In this chapter, two accounts are examined for their ability to explain the experimental data, and recent data from a comparison of blind and sighted participants’ jud...
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Although vision offers distinctive information to space representation, individuals who lack vision since birth often show perceptual and representational skills comparable to those found in sighted individuals. However, congenitally blind individuals may result in impaired spatial analysis, when engaging in 'visual' spatial features (e.g., perspective or angle representation) or complex spatia...
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