Task-Relevant Representations and Cognitive Control Demands Modulate Functional Connectivity from Ventral Occipito-Temporal Cortex During Object Recognition Tasks

Branzi, Francesca M ORCID: 0000-0002-3780-9693, Martin, Clara D and Paz-Alonso, Pedro M (2022) Task-Relevant Representations and Cognitive Control Demands Modulate Functional Connectivity from Ventral Occipito-Temporal Cortex During Object Recognition Tasks. CEREBRAL CORTEX, 32 (14). pp. 3068-3080.

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Official URL: http://dx.doi.org/10.1093/cercor/bhab401

Abstract

The left ventral occipito-temporal cortex (vOTC) supports extraction and processing of visual features. However, it has remained unclear whether left vOTC-based functional connectivity (FC) differs according to task-relevant representations (e.g., lexical, visual) and control demands imposed by the task, even when similar visual-semantic processing is required for object identification. Here, neural responses to the same set of pictures of meaningful objects were measured, while the type of task that participants had to perform (picture naming versus size-judgment task), and the level of cognitive control required by the picture naming task (high versus low interference contexts) were manipulated. Explicit retrieval of lexical representations in the picture naming task facilitated activation of lexical/phonological representations, modulating FC between left vOTC and dorsal anterior-cingulate-cortex/pre-supplementary-motor-area. This effect was not observed in the size-judgment task, which did not require explicit word-retrieval of object names. Furthermore, retrieving the very same lexical/phonological representation in the high versus low interference contexts during picture naming increased FC between left vOTC and left caudate. These findings support the proposal that vOTC functional specialization emerges from interactions with task-relevant brain regions.

Item Type:	Article
Uncontrolled Keywords:	cognate, fMRI, language production, semantic, ventral occipito-temporal cortex
Divisions:	Faculty of Health and Life Sciences Faculty of Health and Life Sciences > Institute of Population Health
Depositing User:	Symplectic Admin
Date Deposited:	12 Oct 2021 07:38
Last Modified:	18 Jan 2023 21:27
DOI:	10.1093/cercor/bhab401
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3140073