Cargando…
Are the senses enough for sense? Early high-level feedback shapes our comprehension of multisensory objects
A key question in cognitive neuroscience is how the brain combines low-level features processed in remote sensory cortices to represent meaningful multisensory objects in our everyday environment. Models of visual object processing typically assume a feedforward cascade through the hierarchically or...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2012
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3458237/ https://www.ncbi.nlm.nih.gov/pubmed/23055957 http://dx.doi.org/10.3389/fnint.2012.00082 |
_version_ | 1782244641594146816 |
---|---|
author | Naci, Lorina Taylor, Kirsten I. Cusack, Rhodri Tyler, Lorraine K. |
author_facet | Naci, Lorina Taylor, Kirsten I. Cusack, Rhodri Tyler, Lorraine K. |
author_sort | Naci, Lorina |
collection | PubMed |
description | A key question in cognitive neuroscience is how the brain combines low-level features processed in remote sensory cortices to represent meaningful multisensory objects in our everyday environment. Models of visual object processing typically assume a feedforward cascade through the hierarchically organized ventral stream. We contrasted this feedforward view with an alternate hypothesis in which object processing is viewed as an interactive, feedforward and feedback process. We found that higher-order regions in anterior temporal (AT) and inferior prefrontal cortex (IPC) performed audio-visual (AV) integration 100 ms earlier than a sensory-driven region in the posterior occipital (pO) cortex, and were modulated by semantic variables (congruency), from as early as 50–100 ms. We propose that the brain represents familiar and complex multisensory objects through early interactivity between higher-order and sensory-driven regions. This interactivity may underpin the enhanced behavioral performance reported for semantically congruent AV objects. |
format | Online Article Text |
id | pubmed-3458237 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2012 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-34582372012-10-09 Are the senses enough for sense? Early high-level feedback shapes our comprehension of multisensory objects Naci, Lorina Taylor, Kirsten I. Cusack, Rhodri Tyler, Lorraine K. Front Integr Neurosci Neuroscience A key question in cognitive neuroscience is how the brain combines low-level features processed in remote sensory cortices to represent meaningful multisensory objects in our everyday environment. Models of visual object processing typically assume a feedforward cascade through the hierarchically organized ventral stream. We contrasted this feedforward view with an alternate hypothesis in which object processing is viewed as an interactive, feedforward and feedback process. We found that higher-order regions in anterior temporal (AT) and inferior prefrontal cortex (IPC) performed audio-visual (AV) integration 100 ms earlier than a sensory-driven region in the posterior occipital (pO) cortex, and were modulated by semantic variables (congruency), from as early as 50–100 ms. We propose that the brain represents familiar and complex multisensory objects through early interactivity between higher-order and sensory-driven regions. This interactivity may underpin the enhanced behavioral performance reported for semantically congruent AV objects. Frontiers Media S.A. 2012-09-26 /pmc/articles/PMC3458237/ /pubmed/23055957 http://dx.doi.org/10.3389/fnint.2012.00082 Text en Copyright © 2012 Naci, Taylor, Cusack and Tyler. http://www.frontiersin.org/licenseagreement This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in other forums, provided the original authors and source are credited and subject to any copyright notices concerning any third-party graphics etc. |
spellingShingle | Neuroscience Naci, Lorina Taylor, Kirsten I. Cusack, Rhodri Tyler, Lorraine K. Are the senses enough for sense? Early high-level feedback shapes our comprehension of multisensory objects |
title | Are the senses enough for sense? Early high-level feedback shapes our comprehension of multisensory objects |
title_full | Are the senses enough for sense? Early high-level feedback shapes our comprehension of multisensory objects |
title_fullStr | Are the senses enough for sense? Early high-level feedback shapes our comprehension of multisensory objects |
title_full_unstemmed | Are the senses enough for sense? Early high-level feedback shapes our comprehension of multisensory objects |
title_short | Are the senses enough for sense? Early high-level feedback shapes our comprehension of multisensory objects |
title_sort | are the senses enough for sense? early high-level feedback shapes our comprehension of multisensory objects |
topic | Neuroscience |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3458237/ https://www.ncbi.nlm.nih.gov/pubmed/23055957 http://dx.doi.org/10.3389/fnint.2012.00082 |
work_keys_str_mv | AT nacilorina arethesensesenoughforsenseearlyhighlevelfeedbackshapesourcomprehensionofmultisensoryobjects AT taylorkirsteni arethesensesenoughforsenseearlyhighlevelfeedbackshapesourcomprehensionofmultisensoryobjects AT cusackrhodri arethesensesenoughforsenseearlyhighlevelfeedbackshapesourcomprehensionofmultisensoryobjects AT tylerlorrainek arethesensesenoughforsenseearlyhighlevelfeedbackshapesourcomprehensionofmultisensoryobjects |