Cargando…
Double dissociation in radial and rotational motion sensitivity
Neurophysiological experiments have shown that a shared region of the primate visual system registers both radial and rotational motion. Radial and rotational motion also share computational features. Despite these neural and computational similarities, prior experiments have disrupted radial, but n...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2021
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7842916/ https://www.ncbi.nlm.nih.gov/pubmed/33508003 http://dx.doi.org/10.1371/journal.pone.0246094 |
_version_ | 1783644035836018688 |
---|---|
author | Matthews, Nestor Welch, Leslie Festa, Elena K. Bruno, Anthony A. |
author_facet | Matthews, Nestor Welch, Leslie Festa, Elena K. Bruno, Anthony A. |
author_sort | Matthews, Nestor |
collection | PubMed |
description | Neurophysiological experiments have shown that a shared region of the primate visual system registers both radial and rotational motion. Radial and rotational motion also share computational features. Despite these neural and computational similarities, prior experiments have disrupted radial, but not rotational, motion sensitivity -a single dissociation. Here we report stimulus manipulations that extend the single dissociation to a double dissociation, thereby showing further separability between radial and rotational motion sensitivity. In Exp 1 bilateral plaid stimuli with or without phase-noise either radiated or rotated before changing direction. College students reported whether the direction changed first on the left or right–a temporal order judgment (TOJ). Phase noise generated significantly larger disruptions to rotational TOJs than to radial TOJs, thereby completing the double dissociation. In Exp 2 we conceptually replicated this double dissociation by switching the task from TOJs to simultaneity judgments (SJs). Phase noise generated significantly larger disruptions to rotational SJs than to radial SJs. This disruption pattern reversed after changing the plaids’ motion from same- to opposite-initial directions. The double dissociations reported here revealed distinct dependencies for radial and rotational motion sensitivity. Radial motion sensitivity depended strongly on information about global depth. Rotational motion sensitivity depended strongly on positional information about local luminance gradients. These distinct dependencies arose downstream from the neural mechanisms that detect local linear components within radial and rotational motion. Overall, the differential impairments generated by our psychophysical experiments demonstrate independence between radial and rotational motion sensitivity, despite their neural and computational similarities. |
format | Online Article Text |
id | pubmed-7842916 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-78429162021-02-02 Double dissociation in radial and rotational motion sensitivity Matthews, Nestor Welch, Leslie Festa, Elena K. Bruno, Anthony A. PLoS One Research Article Neurophysiological experiments have shown that a shared region of the primate visual system registers both radial and rotational motion. Radial and rotational motion also share computational features. Despite these neural and computational similarities, prior experiments have disrupted radial, but not rotational, motion sensitivity -a single dissociation. Here we report stimulus manipulations that extend the single dissociation to a double dissociation, thereby showing further separability between radial and rotational motion sensitivity. In Exp 1 bilateral plaid stimuli with or without phase-noise either radiated or rotated before changing direction. College students reported whether the direction changed first on the left or right–a temporal order judgment (TOJ). Phase noise generated significantly larger disruptions to rotational TOJs than to radial TOJs, thereby completing the double dissociation. In Exp 2 we conceptually replicated this double dissociation by switching the task from TOJs to simultaneity judgments (SJs). Phase noise generated significantly larger disruptions to rotational SJs than to radial SJs. This disruption pattern reversed after changing the plaids’ motion from same- to opposite-initial directions. The double dissociations reported here revealed distinct dependencies for radial and rotational motion sensitivity. Radial motion sensitivity depended strongly on information about global depth. Rotational motion sensitivity depended strongly on positional information about local luminance gradients. These distinct dependencies arose downstream from the neural mechanisms that detect local linear components within radial and rotational motion. Overall, the differential impairments generated by our psychophysical experiments demonstrate independence between radial and rotational motion sensitivity, despite their neural and computational similarities. Public Library of Science 2021-01-28 /pmc/articles/PMC7842916/ /pubmed/33508003 http://dx.doi.org/10.1371/journal.pone.0246094 Text en © 2021 Matthews et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Matthews, Nestor Welch, Leslie Festa, Elena K. Bruno, Anthony A. Double dissociation in radial and rotational motion sensitivity |
title | Double dissociation in radial and rotational motion sensitivity |
title_full | Double dissociation in radial and rotational motion sensitivity |
title_fullStr | Double dissociation in radial and rotational motion sensitivity |
title_full_unstemmed | Double dissociation in radial and rotational motion sensitivity |
title_short | Double dissociation in radial and rotational motion sensitivity |
title_sort | double dissociation in radial and rotational motion sensitivity |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7842916/ https://www.ncbi.nlm.nih.gov/pubmed/33508003 http://dx.doi.org/10.1371/journal.pone.0246094 |
work_keys_str_mv | AT matthewsnestor doubledissociationinradialandrotationalmotionsensitivity AT welchleslie doubledissociationinradialandrotationalmotionsensitivity AT festaelenak doubledissociationinradialandrotationalmotionsensitivity AT brunoanthonya doubledissociationinradialandrotationalmotionsensitivity |