Inferotemporal cortex multiplexes behaviorally-relevant target match signals and visual representations in a manner that minimizes their interference.
Finding a sought visual target object requires combining visual information about a scene with a remembered representation of the target to create a "target match" signal that indicates when a target is in view. Target match signals have been reported to exist within high-level visual brai...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Public Library of Science (PLoS)
2018-01-01
|
| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC6053150?pdf=render |
| _version_ | 1818590056494923776 |
|---|---|
| author | Noam Roth Nicole C Rust |
| author_facet | Noam Roth Nicole C Rust |
| author_sort | Noam Roth |
| collection | DOAJ |
| description | Finding a sought visual target object requires combining visual information about a scene with a remembered representation of the target to create a "target match" signal that indicates when a target is in view. Target match signals have been reported to exist within high-level visual brain areas including inferotemporal cortex (IT), where they are mixed with representations of image and object identity. However, these signals are not well understood, particularly in the context of the real-world challenge that the objects we search for typically appear at different positions, sizes, and within different background contexts. To investigate these signals, we recorded neural responses in IT as two rhesus monkeys performed a delayed-match-to-sample object search task in which target objects could appear at a variety of identity-preserving transformations. Consistent with the existence of behaviorally-relevant target match signals in IT, we found that IT contained a linearly separable target match representation that reflected behavioral confusions on trials in which the monkeys made errors. Additionally, target match signals were highly distributed across the IT population, and while a small fraction of units reflected target match signals as target match suppression, most units reflected target match signals as target match enhancement. Finally, we found that the potentially detrimental impact of target match signals on visual representations was mitigated by target match modulation that was approximately (albeit imperfectly) multiplicative. Together, these results support the existence of a robust, behaviorally-relevant target match representation in IT that is configured to minimally interfere with IT visual representations. |
| first_indexed | 2024-12-16T09:50:28Z |
| format | Article |
| id | doaj.art-51eac307393f4285997fc8d69ca4b378 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-16T09:50:28Z |
| publishDate | 2018-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-51eac307393f4285997fc8d69ca4b3782022-12-21T22:36:04ZengPublic Library of Science (PLoS)PLoS ONE1932-62032018-01-01137e020052810.1371/journal.pone.0200528Inferotemporal cortex multiplexes behaviorally-relevant target match signals and visual representations in a manner that minimizes their interference.Noam RothNicole C RustFinding a sought visual target object requires combining visual information about a scene with a remembered representation of the target to create a "target match" signal that indicates when a target is in view. Target match signals have been reported to exist within high-level visual brain areas including inferotemporal cortex (IT), where they are mixed with representations of image and object identity. However, these signals are not well understood, particularly in the context of the real-world challenge that the objects we search for typically appear at different positions, sizes, and within different background contexts. To investigate these signals, we recorded neural responses in IT as two rhesus monkeys performed a delayed-match-to-sample object search task in which target objects could appear at a variety of identity-preserving transformations. Consistent with the existence of behaviorally-relevant target match signals in IT, we found that IT contained a linearly separable target match representation that reflected behavioral confusions on trials in which the monkeys made errors. Additionally, target match signals were highly distributed across the IT population, and while a small fraction of units reflected target match signals as target match suppression, most units reflected target match signals as target match enhancement. Finally, we found that the potentially detrimental impact of target match signals on visual representations was mitigated by target match modulation that was approximately (albeit imperfectly) multiplicative. Together, these results support the existence of a robust, behaviorally-relevant target match representation in IT that is configured to minimally interfere with IT visual representations.http://europepmc.org/articles/PMC6053150?pdf=render |
| spellingShingle | Noam Roth Nicole C Rust Inferotemporal cortex multiplexes behaviorally-relevant target match signals and visual representations in a manner that minimizes their interference. PLoS ONE |
| title | Inferotemporal cortex multiplexes behaviorally-relevant target match signals and visual representations in a manner that minimizes their interference. |
| title_full | Inferotemporal cortex multiplexes behaviorally-relevant target match signals and visual representations in a manner that minimizes their interference. |
| title_fullStr | Inferotemporal cortex multiplexes behaviorally-relevant target match signals and visual representations in a manner that minimizes their interference. |
| title_full_unstemmed | Inferotemporal cortex multiplexes behaviorally-relevant target match signals and visual representations in a manner that minimizes their interference. |
| title_short | Inferotemporal cortex multiplexes behaviorally-relevant target match signals and visual representations in a manner that minimizes their interference. |
| title_sort | inferotemporal cortex multiplexes behaviorally relevant target match signals and visual representations in a manner that minimizes their interference |
| url | http://europepmc.org/articles/PMC6053150?pdf=render |
| work_keys_str_mv | AT noamroth inferotemporalcortexmultiplexesbehaviorallyrelevanttargetmatchsignalsandvisualrepresentationsinamannerthatminimizestheirinterference AT nicolecrust inferotemporalcortexmultiplexesbehaviorallyrelevanttargetmatchsignalsandvisualrepresentationsinamannerthatminimizestheirinterference |