Behavioral Differences in the Upper and Lower Visual Hemifields in Shape and Motion Perception.

Zito, Giuseppe Angelo; Cazzoli, Dario; Müri, René Martin; Mosimann, Urs Peter; Nef, Tobias (2016). Behavioral Differences in the Upper and Lower Visual Hemifields in Shape and Motion Perception. Frontiers in behavioral neuroscience, 10(128), p. 128. Frontiers Research Foundation 10.3389/fnbeh.2016.00128

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Perceptual accuracy is known to be influenced by stimuli location within the visual field. In particular, it seems to be enhanced in the lower visual hemifield (VH) for motion and space processing, and in the upper VH for object and face processing. The origins of such asymmetries are attributed to attentional biases across the visual field, and in the functional organization of the visual system. In this article, we tested content-dependent perceptual asymmetries in different regions of the visual field. Twenty-five healthy volunteers participated in this study. They performed three visual tests involving perception of shapes, orientation and motion, in the four quadrants of the visual field. The results of the visual tests showed that perceptual accuracy was better in the lower than in the upper visual field for motion perception, and better in the upper than in the lower visual field for shape perception. Orientation perception did not show any vertical bias. No difference was found when comparing right and left VHs. The functional organization of the visual system seems to indicate that the dorsal and the ventral visual streams, responsible for motion and shape perception, respectively, show a bias for the lower and upper VHs, respectively. Such a bias depends on the content of the visual information.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > University Psychiatric Services > University Hospital of Geriatric Psychiatry and Psychotherapy
10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research > ARTORG Center - Gerontechnology and Rehabilitation
04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Neurology

Graduate School:

Graduate School for Cellular and Biomedical Sciences (GCB)

UniBE Contributor:

Zito, Giuseppe Angelo; Cazzoli, Dario; Müri, René Martin; Mosimann, Urs Peter and Nef, Tobias

Subjects:

600 Technology > 610 Medicine & health

ISSN:

1662-5153

Publisher:

Frontiers Research Foundation

Language:

English

Submitter:

Stefanie Hetzenecker

Date Deposited:

25 Jul 2016 17:01

Last Modified:

10 Sep 2017 12:09

Publisher DOI:

10.3389/fnbeh.2016.00128

PubMed ID:

27378876

Uncontrolled Keywords:

motion perception; perceptual asymmetries; shape perception; upper and lower hemifields; visual test

BORIS DOI:

10.7892/boris.84389

URI:

https://boris.unibe.ch/id/eprint/84389

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