Pseudoneglect

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As Pseudoneglect refers to the tendency that attention to steer more to the left than to the right. The term was first used in connection with the finding that people who are supposed to mark the center of a horizontal line deviate more often to the left than to the right from the actual center. A comparable "preference" for the left field of vision is also evident in other spatial-visual tasks. The effects of pseudoneglect are similar to the impairments of patients with visual neglect , but pseudoneglect leads to significantly smaller effects, which can be observed in healthy people (mostly in laboratory studies).

Analogous to humans, a tendency to shift attention to the left could also be shown across species in two different bird species - pigeons and chickens . Hence, the basic mechanism is presumed to be in the asymmetry of neural processing . The findings in birds are in contrast to the prevailing hypothesis , which provides for the corpus callosum to be involved in the development of this side difference in processing. However, because there is no corpus callosum in the brain of birds, a site-specific functional specialization is assumed at the level of the visual cortex instead . Accordingly, a task-specific differentiation of the right visual cortex emerges in the tests used for shifting attention due to the crossing of the visual pathways .

Pseudoneglect occurs in both right-handed and left-handed people; the preference for the left side is somewhat more pronounced for right-handers.

See also

Individual evidence

  1. ^ Dawn Bowers, Kenneth M. Heilman: Pseudoneglect: Effects of hemispace on a tactile line bisection task . In: Neuropsychologia . tape 18 , no. 4-5 , 1980, pp. 491-498 , doi : 10.1016 / 0028-3932 (80) 90151-7 .
  2. ↑ George Jewell, Mark E. McCourt: Pseudoneglect: a review and meta-analysis of performance factors in line bisection tasks . In: Neuropsychologia . tape 38 , no. 1 , January 2000, p. 93-110 , doi : 10.1016 / s0028-3932 (99) 00045-7 .
  3. ↑ Bettina Diekamp, ​​Lucia Regolin, Onur Güntürkün, Giorgio Vallortigara: A left-sided visuospatial bias in birds . In: Current Biology . tape 15 , no. 10 , May 24, 2005, p. R372 – R373 , doi : 10.1016 / j.cub.2005.05.017 ( elsevier.com [accessed November 13, 2017]).