Concurrent repetition enhancement and suppression responses in extrastriate visual cortex.
Visual cortical responses are usually attenuated by repetition, a phenomenon known as repetition suppression (RS). Here, we use multivoxel pattern analyses of functional magnetic resonance imaging (fMRI) data to show that RS co-occurs with the converse phenomenon (repetition enhancement, RE) in a si...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
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2013
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| _version_ | 1797068289008992256 |
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| author | de Gardelle, V Waszczuk, M Egner, T Summerfield, C |
| author_facet | de Gardelle, V Waszczuk, M Egner, T Summerfield, C |
| author_sort | de Gardelle, V |
| collection | OXFORD |
| description | Visual cortical responses are usually attenuated by repetition, a phenomenon known as repetition suppression (RS). Here, we use multivoxel pattern analyses of functional magnetic resonance imaging (fMRI) data to show that RS co-occurs with the converse phenomenon (repetition enhancement, RE) in a single cortical region. We presented human volunteers with short sequences of repeated faces and measured brain activity using fMRI. In an independently defined face-responsive extrastriate region, the response of each voxel to repetition (RS vs. RE) was consistent across scanner runs, and multivoxel patterns for both RS and RE voxels were stable. Moreover, RS and RE voxels responded to repetition with dissociable latencies and exhibited different patterns of connectivity with lower and higher visual regions. Computational simulations demonstrated that these effects must be due to differences in repetition sensitivity, and not feature selectivity. These findings establish that 2 classes of repetition responses coexist within 1 visual region and support models acknowledging this distinction, such as predictive coding models where perception requires the computation of both predictions (which are enhanced by repetition) and prediction errors (which are suppressed by repetition). |
| first_indexed | 2024-03-06T22:08:35Z |
| format | Journal article |
| id | oxford-uuid:5105135b-d916-41b0-beb9-23e57085f8f7 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:08:35Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | oxford-uuid:5105135b-d916-41b0-beb9-23e57085f8f72022-03-26T16:16:58ZConcurrent repetition enhancement and suppression responses in extrastriate visual cortex.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:5105135b-d916-41b0-beb9-23e57085f8f7EnglishSymplectic Elements at Oxford2013de Gardelle, VWaszczuk, MEgner, TSummerfield, CVisual cortical responses are usually attenuated by repetition, a phenomenon known as repetition suppression (RS). Here, we use multivoxel pattern analyses of functional magnetic resonance imaging (fMRI) data to show that RS co-occurs with the converse phenomenon (repetition enhancement, RE) in a single cortical region. We presented human volunteers with short sequences of repeated faces and measured brain activity using fMRI. In an independently defined face-responsive extrastriate region, the response of each voxel to repetition (RS vs. RE) was consistent across scanner runs, and multivoxel patterns for both RS and RE voxels were stable. Moreover, RS and RE voxels responded to repetition with dissociable latencies and exhibited different patterns of connectivity with lower and higher visual regions. Computational simulations demonstrated that these effects must be due to differences in repetition sensitivity, and not feature selectivity. These findings establish that 2 classes of repetition responses coexist within 1 visual region and support models acknowledging this distinction, such as predictive coding models where perception requires the computation of both predictions (which are enhanced by repetition) and prediction errors (which are suppressed by repetition). |
| spellingShingle | de Gardelle, V Waszczuk, M Egner, T Summerfield, C Concurrent repetition enhancement and suppression responses in extrastriate visual cortex. |
| title | Concurrent repetition enhancement and suppression responses in extrastriate visual cortex. |
| title_full | Concurrent repetition enhancement and suppression responses in extrastriate visual cortex. |
| title_fullStr | Concurrent repetition enhancement and suppression responses in extrastriate visual cortex. |
| title_full_unstemmed | Concurrent repetition enhancement and suppression responses in extrastriate visual cortex. |
| title_short | Concurrent repetition enhancement and suppression responses in extrastriate visual cortex. |
| title_sort | concurrent repetition enhancement and suppression responses in extrastriate visual cortex |
| work_keys_str_mv | AT degardellev concurrentrepetitionenhancementandsuppressionresponsesinextrastriatevisualcortex AT waszczukm concurrentrepetitionenhancementandsuppressionresponsesinextrastriatevisualcortex AT egnert concurrentrepetitionenhancementandsuppressionresponsesinextrastriatevisualcortex AT summerfieldc concurrentrepetitionenhancementandsuppressionresponsesinextrastriatevisualcortex |