Motion along the mental number line reveals shared representations for numerosity and space
Perception of number and space are tightly intertwined. It has been proposed that this is due to ‘cortical recycling’, where numerosity processing takes over circuits originally processing space. Do such ‘recycled’ circuits retain their original functionality? Here, we investigate interactions betwe...
| Main Authors: | , , |
|---|---|
| Format: | Online |
| Language: | English |
| Published: |
eLife Sciences Publications, Ltd
2016
|
| Online Access: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4764558/ |
| id |
pubmed-4764558 |
|---|---|
| recordtype |
oai_dc |
| spelling |
pubmed-47645582016-02-25 Motion along the mental number line reveals shared representations for numerosity and space Schwiedrzik, Caspar M Bernstein, Benjamin Melloni, Lucia Neuroscience Perception of number and space are tightly intertwined. It has been proposed that this is due to ‘cortical recycling’, where numerosity processing takes over circuits originally processing space. Do such ‘recycled’ circuits retain their original functionality? Here, we investigate interactions between numerosity and motion direction, two functions that both localize to parietal cortex. We describe a new phenomenon in which visual motion direction adapts nonsymbolic numerosity perception, giving rise to a repulsive aftereffect: motion to the left adapts small numbers, leading to overestimation of numerosity, while motion to the right adapts large numbers, resulting in underestimation. The reference frame of this effect is spatiotopic. Together with the tuning properties of the effect this suggests that motion direction-numerosity cross-adaptation may occur in a homolog of area LIP. ‘Cortical recycling’ thus expands but does not obliterate the functions originally performed by the recycled circuit, allowing for shared computations across domains. eLife Sciences Publications, Ltd 2016-01-15 /pmc/articles/PMC4764558/ /pubmed/26771249 http://dx.doi.org/10.7554/eLife.10806 Text en © 2016, Schwiedrzik et al http://creativecommons.org/licenses/by/4.0/ This article is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use and redistribution provided that the original author and source are credited. |
| repository_type |
Open Access Journal |
| institution_category |
Foreign Institution |
| institution |
US National Center for Biotechnology Information |
| building |
NCBI PubMed |
| collection |
Online Access |
| language |
English |
| format |
Online |
| author |
Schwiedrzik, Caspar M Bernstein, Benjamin Melloni, Lucia |
| spellingShingle |
Schwiedrzik, Caspar M Bernstein, Benjamin Melloni, Lucia Motion along the mental number line reveals shared representations for numerosity and space |
| author_facet |
Schwiedrzik, Caspar M Bernstein, Benjamin Melloni, Lucia |
| author_sort |
Schwiedrzik, Caspar M |
| title |
Motion along the mental number line reveals shared representations for numerosity and space |
| title_short |
Motion along the mental number line reveals shared representations for numerosity and space |
| title_full |
Motion along the mental number line reveals shared representations for numerosity and space |
| title_fullStr |
Motion along the mental number line reveals shared representations for numerosity and space |
| title_full_unstemmed |
Motion along the mental number line reveals shared representations for numerosity and space |
| title_sort |
motion along the mental number line reveals shared representations for numerosity and space |
| description |
Perception of number and space are tightly intertwined. It has been proposed that this is due to ‘cortical recycling’, where numerosity processing takes over circuits originally processing space. Do such ‘recycled’ circuits retain their original functionality? Here, we investigate interactions between numerosity and motion direction, two functions that both localize to parietal cortex. We describe a new phenomenon in which visual motion direction adapts nonsymbolic numerosity perception, giving rise to a repulsive aftereffect: motion to the left adapts small numbers, leading to overestimation of numerosity, while motion to the right adapts large numbers, resulting in underestimation. The reference frame of this effect is spatiotopic. Together with the tuning properties of the effect this suggests that motion direction-numerosity cross-adaptation may occur in a homolog of area LIP. ‘Cortical recycling’ thus expands but does not obliterate the functions originally performed by the recycled circuit, allowing for shared computations across domains. |
| publisher |
eLife Sciences Publications, Ltd |
| publishDate |
2016 |
| url |
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4764558/ |
| _version_ |
1613542324726398976 |