English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Predictive coding over the lifespan: Increased reliance on perceptual priors in older adults: A magnetoencephalography and dynamic causal modelling study

Chan, J. S., Wibral, M., Wollstadt, P., Brandl, M., Helbling, S., Naumer, M., et al. (2017). Predictive coding over the lifespan: Increased reliance on perceptual priors in older adults: A magnetoencephalography and dynamic causal modelling study. bioRxiv. doi:10.1101/178095.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0004-BB59-6 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-BB5A-5
Genre: Paper

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Chan, Jason S.1, Author
Wibral, Michael2, Author
Wollstadt, Patricia2, Author
Brandl, Mareike1, Author
Helbling, Saskia1, 2, Author              
Naumer, Marcus 1, Author
Kaiser, Jochen1, Author
Affiliations:
1Institute of Medical Psychology, Goethe-University, Frankfurt am Main, Germany, ou_persistent22              
2Brain Imaging Center, Goethe-University, Frankfurt am Main, Germany, ou_persistent22              

Content

show
hide
Free keywords: -
 Abstract: Aging is accompanied by unisensory decline; but to compensate for this, two complementary strategies are potentially relied upon increasingly: first, older adults integrate more information from different sensory organs. Second, according to predictive coding (PC) we form ‘templates’ (internal models or ‘priors’) of the environment through our experiences. It is through increased life experience that older adults may rely more on these templates compared to younger adults. Multisensory integration and predictive coding would be effective strategies for the perception of near-threshold stimuli, but they come at the cost of integrating irrelevant information. Their role can be studied in multisensory illusions because these require the integration of different sensory information, as well as an internal model of the world that can take precedence over sensory input. Here, we elicited a classic multisensory illusion, the sound-induced flash illusion, in younger (mean: 27 yrs) and older (mean: 67 yrs) adult participants while recording the magnetoencephalogram. Older adults perceived more illusions than younger adults. Older adults had increased pre-stimulus beta(β)-band activity compared to younger adults as predicted by microcircuit theories of predictive coding, which suggest priors and predictions are linked to β-band activity. In line with our hypothesis, transfer entropy analysis and dynamic causal models of pre-stimulus MEG data revealed a stronger illusion-related modulation of cross-modal connectivity from auditory to visual cortices in older compared to younger adults. We interpret this as the neural correlate of increased reliance on a cross-modal predictive template in older adults that is leading to the illusory percept.

Details

show
hide
Language(s): eng - English
 Dates: 2017-08-18
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: No review
 Identifiers: DOI: 10.1101/178095
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: bioRxiv
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: -