File Download
There are no files associated with this item.
Links for fulltext
(May Require Subscription)
- Publisher Website: 10.1016/j.neuroimage.2019.116032
- Scopus: eid_2-s2.0-85069658559
- WOS: WOS:000487755700018
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: Color contrast adaptation: fMRI fails to predict behavioral adaptation
Title | Color contrast adaptation: fMRI fails to predict behavioral adaptation |
---|---|
Authors | |
Keywords | BOLD adaptation Color vision Koniocellular S-cone isolating Temporal scales |
Issue Date | 2019 |
Publisher | Academic Press. The Journal's web site is located at http://www.elsevier.com/locate/ynimg |
Citation | NeuroImage, 2019, v. 201, article no. 116032 How to Cite? |
Abstract | fMRI-adaptation is a valuable tool for inferring the selectivity of neural responses. Here we use it in human color vision to test the selectivity of responses to S-cone opponent (blue-yellow), L/M-cone opponent (red-green), and achromatic (Ach) contrast across nine regions of interest in visual cortex. We measure psychophysical adaptation, using comparable stimuli to the fMRI-adaptation, and find significant selective adaptation for all three stimulus types, implying separable visual responses to each. For fMRI-adaptation, we find robust adaptation but, surprisingly, much less selectivity due to high levels of cross-stimulus adaptation in all conditions. For all BY and Ach test/adaptor pairs, selectivity is absent across all ROIs. For RG/Ach stimulus pairs, this paradigm has previously shown selectivity for RG in ventral areas and for Ach in dorsal areas. For chromatic stimulus pairs (RG/BY), we find a trend for selectivity in ventral areas. In conclusion, we find an overall lack of correspondence between BOLD and behavioral adaptation suggesting they reflect different aspects of the underlying neural processes. For example, raised cross-stimulus adaptation in fMRI may reflect adaptation of the broadly-tuned normalization pool. Finally, we also identify a longer-timescale adaptation (1h) in both BOLD and behavioral data. This is greater for chromatic than achromatic contrast. The longer-timescale BOLD effect was more evident in the higher ventral areas than in V1, consistent with increasing windows of temporal integration for higher-order areas. © 2019 Elsevier Inc. |
Persistent Identifier | http://hdl.handle.net/10722/273803 |
ISSN | 2023 Impact Factor: 4.7 2023 SCImago Journal Rankings: 2.436 |
ISI Accession Number ID |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Goddard, E | - |
dc.contributor.author | Chang, HFD | - |
dc.contributor.author | Hess, RF | - |
dc.contributor.author | Mullen, KT | - |
dc.date.accessioned | 2019-08-18T14:48:53Z | - |
dc.date.available | 2019-08-18T14:48:53Z | - |
dc.date.issued | 2019 | - |
dc.identifier.citation | NeuroImage, 2019, v. 201, article no. 116032 | - |
dc.identifier.issn | 1053-8119 | - |
dc.identifier.uri | http://hdl.handle.net/10722/273803 | - |
dc.description.abstract | fMRI-adaptation is a valuable tool for inferring the selectivity of neural responses. Here we use it in human color vision to test the selectivity of responses to S-cone opponent (blue-yellow), L/M-cone opponent (red-green), and achromatic (Ach) contrast across nine regions of interest in visual cortex. We measure psychophysical adaptation, using comparable stimuli to the fMRI-adaptation, and find significant selective adaptation for all three stimulus types, implying separable visual responses to each. For fMRI-adaptation, we find robust adaptation but, surprisingly, much less selectivity due to high levels of cross-stimulus adaptation in all conditions. For all BY and Ach test/adaptor pairs, selectivity is absent across all ROIs. For RG/Ach stimulus pairs, this paradigm has previously shown selectivity for RG in ventral areas and for Ach in dorsal areas. For chromatic stimulus pairs (RG/BY), we find a trend for selectivity in ventral areas. In conclusion, we find an overall lack of correspondence between BOLD and behavioral adaptation suggesting they reflect different aspects of the underlying neural processes. For example, raised cross-stimulus adaptation in fMRI may reflect adaptation of the broadly-tuned normalization pool. Finally, we also identify a longer-timescale adaptation (1h) in both BOLD and behavioral data. This is greater for chromatic than achromatic contrast. The longer-timescale BOLD effect was more evident in the higher ventral areas than in V1, consistent with increasing windows of temporal integration for higher-order areas. © 2019 Elsevier Inc. | - |
dc.language | eng | - |
dc.publisher | Academic Press. The Journal's web site is located at http://www.elsevier.com/locate/ynimg | - |
dc.relation.ispartof | NeuroImage | - |
dc.subject | BOLD adaptation | - |
dc.subject | Color vision | - |
dc.subject | Koniocellular | - |
dc.subject | S-cone isolating | - |
dc.subject | Temporal scales | - |
dc.title | Color contrast adaptation: fMRI fails to predict behavioral adaptation | - |
dc.type | Article | - |
dc.identifier.email | Chang, HFD: changd@hku.hk | - |
dc.identifier.authority | Chang, HFD=rp02272 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.neuroimage.2019.116032 | - |
dc.identifier.scopus | eid_2-s2.0-85069658559 | - |
dc.identifier.hkuros | 301817 | - |
dc.identifier.volume | 201 | - |
dc.identifier.spage | article no. 116032 | - |
dc.identifier.epage | article no. 116032 | - |
dc.identifier.isi | WOS:000487755700018 | - |
dc.publisher.place | United States | - |
dc.identifier.issnl | 1053-8119 | - |