| Speed decrements are seen better than increments through small apertures. | |
| | |
MedLine Citation:
|
PMID: 11819053 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Five subjects observed a random dot pattern that moved horizontally within a rectangular, 40 deg x 4 deg invisible aperture. The long side of this aperture was either parallel or perpendicular to the direction of motion. A two-interval forced-choice procedure was employed for measuring the thresholds for detection of 100-ms speed increments and decrements superimposed on uniform motion of 1.1 s duration and base speeds of 8 deg/s, 16 deg/s, 24 deg/s, and 32 deg/s. The aperture orientation had almost no effect on the detection of decrements. With increasing base speed, the thresholds for increments within the perpendicular aperture rose markedly as compared to those for increments within the parallel aperture and to those for decrements. The results are interpreted in the context of facilitatory interactions between the motion detectors along the trajectory of motion of each individual dot. It is shown how, having rapid motion within the perpendicular aperture, increment detection can severely deteriorate owing to the short lifetime and the small visible path of the dots, whereas decrement detection may be almost unaffected. |
| | |
Authors:
|
J Hohnsbein; S Mateeff |
Related Documents
:
|
6693933 - Columnar organization of directionally selective cells in visual area mt of the macaque. 19761323 - Assessing direction-specific adaptation using the steady-state visual evoked potential:... 19147143 - Posturographic analysis through markerless motion capture without ground reaction force... |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2001-12-19 |
Journal Detail:
|
Title: Experimental brain research. Experimentelle Hirnforschung. Expérimentation cérébrale Volume: 142 ISSN: 0014-4819 ISO Abbreviation: Exp Brain Res Publication Date: 2002 Feb |
Date Detail:
|
Created Date: 2002-03-06 Completed Date: 2002-04-25 Revised Date: 2009-11-11 |
Medline Journal Info:
|
Nlm Unique ID: 0043312 Medline TA: Exp Brain Res Country: Germany |
Other Details:
|
Languages: eng Pagination: 434-8 Citation Subset: IM |
Affiliation:
|
Institut für Arbeitsphysiologie, Ardeystr. 67, 44139 Dortmund, Germany. hohnsbein@arb-phys.uni-dortmund.de |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Humans Motion Perception / physiology* Neuropsychological Tests / standards* Pattern Recognition, Visual / physiology* Photic Stimulation / methods* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Imitation of novel and well-known actions: the role of short-term memory.
Next Document: Functional neuroimaging and childhood autism.