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Multiscale integration of contextual information during a naturalistic task

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posted on 2023-06-09, 08:07 authored by James Keidel, Christiane Oedekoven, Andreea Tut, Chris BirdChris Bird
Everyday experience requires rapid and automatic integration of incoming stimuli with previously stored knowledge. Prior knowledge can help construct a general “situation model” of the event, as well as aid comprehension of an ongoing narrative. Using fMRI in healthy adult humans we investigated processing of videos whose locations and characters were always familiar but whose narratives were either a continuation or non-continuation of an earlier video (high context (HC) or low context (LC) respectively). Responses in parahippocampal gyrus and retrosplenial cortex were composed of an initial transient, locked to the video onsets, followed by a period of lower amplitude activation that was greater in the LC condition. This may reflect rapid processing of core components of situation models such as location and characters and more gradual incorporation of their narrative themes. By contrast, activity increases in left hemisphere middle temporal gyrus (MTG), angular gyrus and inferior frontal gyrus were maintained throughout the videos and were higher for HC versus LC videos. Further, activity in the left MTG peaked earlier in the HC condition. We suggest that these regions support representations of the specific inter-linked concepts necessary to comprehend an ongoing narrative, which are already established for the HC videos.

History

Publication status

  • Published

File Version

  • Accepted version

Journal

Cerebral Cortex

ISSN

1047-3211

Publisher

Oxford University Press

Issue

10

Volume

28

Page range

3531-3539

Department affiliated with

  • Psychology Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2017-09-27

First Open Access (FOA) Date

2018-08-22

First Compliant Deposit (FCD) Date

2017-09-27

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