Predictive processing increases intelligibility of acoustically distorted speech: Behavioral and neural correlates

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Predictive processing increases intelligibility of acoustically distorted speech : Behavioral and neural correlates. / Hakonen, Maria; May, Patrick J.C.; Jääskeläinen, Iiro; Jokinen, Emma; Sams, Mikko; Tiitinen, Hannu.

julkaisussa: Brain and Behavior, Vuosikerta 7, Nro 9, e00789, 09.2017.

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

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@article{5856d32b2f404316b6bc8d171f905b9d,
title = "Predictive processing increases intelligibility of acoustically distorted speech: Behavioral and neural correlates",
abstract = "Introduction: We examined which brain areas are involved in the comprehension of acoustically distorted speech using an experimental paradigm where the same distorted sentence can be perceived at different levels of intelligibility. This change in intelligibility occurs via a single intervening presentation of the intact version of the sentence, and the effect lasts at least on the order of minutes. Since the acoustic structure of the distorted stimulus is kept fixed and only intelligibility is varied, this allows one to study brain activity related to speech comprehension specifically.Methods: In a functional magnetic resonance imaging (fMRI) experiment, a stimulus set contained a block of six distorted sentences. This was followed by the intact counterparts of the sentences, after which the sentences were presented in distorted form again. A total of 18 such sets were presented to 20 human subjects.Results: The blood oxygenation level dependent (BOLD)-responses elicited by the distorted sentences which came after the disambiguating, intact sentences were contrasted with the responses to the sentences presented before disambiguation. This revealed increased activity in the bilateral frontal pole, the dorsal anterior cingulate/paracingulate cortex, and the right frontal operculum. Decreased BOLD responses were observed in the posterior insula, Heschl’s gyrus, and the posterior superior temporal sulcus.Conclusions: The brain areas that showed BOLD-enhancement for increased sentence comprehension have been associated with executive functions and with the mapping of incoming sensory information to representations stored in episodic memory. Thus, the comprehension of acoustically distorted speech may be associated with the engagement of memory-related subsystems. Further, activity in the primary auditory cortex was modulated by prior experience, possibly in a predictive coding framework. Our results suggest that memory biases the perception of ambiguous sensory information toward interpretations that have the highest probability to be correct based on previous experience.",
keywords = "Acoustic distortion, comprehension, fMRI, Intelligibility, memory, Speech",
author = "Maria Hakonen and May, {Patrick J.C.} and Iiro J{\"a}{\"a}skel{\"a}inen and Emma Jokinen and Mikko Sams and Hannu Tiitinen",
year = "2017",
month = "9",
doi = "10.1002/brb3.789",
language = "English",
volume = "7",
journal = "Brain and Behavior",
issn = "2162-3279",
publisher = "John Wiley and Sons Inc.",
number = "9",

}

RIS - Lataa

TY - JOUR

T1 - Predictive processing increases intelligibility of acoustically distorted speech

T2 - Behavioral and neural correlates

AU - Hakonen, Maria

AU - May, Patrick J.C.

AU - Jääskeläinen, Iiro

AU - Jokinen, Emma

AU - Sams, Mikko

AU - Tiitinen, Hannu

PY - 2017/9

Y1 - 2017/9

N2 - Introduction: We examined which brain areas are involved in the comprehension of acoustically distorted speech using an experimental paradigm where the same distorted sentence can be perceived at different levels of intelligibility. This change in intelligibility occurs via a single intervening presentation of the intact version of the sentence, and the effect lasts at least on the order of minutes. Since the acoustic structure of the distorted stimulus is kept fixed and only intelligibility is varied, this allows one to study brain activity related to speech comprehension specifically.Methods: In a functional magnetic resonance imaging (fMRI) experiment, a stimulus set contained a block of six distorted sentences. This was followed by the intact counterparts of the sentences, after which the sentences were presented in distorted form again. A total of 18 such sets were presented to 20 human subjects.Results: The blood oxygenation level dependent (BOLD)-responses elicited by the distorted sentences which came after the disambiguating, intact sentences were contrasted with the responses to the sentences presented before disambiguation. This revealed increased activity in the bilateral frontal pole, the dorsal anterior cingulate/paracingulate cortex, and the right frontal operculum. Decreased BOLD responses were observed in the posterior insula, Heschl’s gyrus, and the posterior superior temporal sulcus.Conclusions: The brain areas that showed BOLD-enhancement for increased sentence comprehension have been associated with executive functions and with the mapping of incoming sensory information to representations stored in episodic memory. Thus, the comprehension of acoustically distorted speech may be associated with the engagement of memory-related subsystems. Further, activity in the primary auditory cortex was modulated by prior experience, possibly in a predictive coding framework. Our results suggest that memory biases the perception of ambiguous sensory information toward interpretations that have the highest probability to be correct based on previous experience.

AB - Introduction: We examined which brain areas are involved in the comprehension of acoustically distorted speech using an experimental paradigm where the same distorted sentence can be perceived at different levels of intelligibility. This change in intelligibility occurs via a single intervening presentation of the intact version of the sentence, and the effect lasts at least on the order of minutes. Since the acoustic structure of the distorted stimulus is kept fixed and only intelligibility is varied, this allows one to study brain activity related to speech comprehension specifically.Methods: In a functional magnetic resonance imaging (fMRI) experiment, a stimulus set contained a block of six distorted sentences. This was followed by the intact counterparts of the sentences, after which the sentences were presented in distorted form again. A total of 18 such sets were presented to 20 human subjects.Results: The blood oxygenation level dependent (BOLD)-responses elicited by the distorted sentences which came after the disambiguating, intact sentences were contrasted with the responses to the sentences presented before disambiguation. This revealed increased activity in the bilateral frontal pole, the dorsal anterior cingulate/paracingulate cortex, and the right frontal operculum. Decreased BOLD responses were observed in the posterior insula, Heschl’s gyrus, and the posterior superior temporal sulcus.Conclusions: The brain areas that showed BOLD-enhancement for increased sentence comprehension have been associated with executive functions and with the mapping of incoming sensory information to representations stored in episodic memory. Thus, the comprehension of acoustically distorted speech may be associated with the engagement of memory-related subsystems. Further, activity in the primary auditory cortex was modulated by prior experience, possibly in a predictive coding framework. Our results suggest that memory biases the perception of ambiguous sensory information toward interpretations that have the highest probability to be correct based on previous experience.

KW - Acoustic distortion

KW - comprehension

KW - fMRI

KW - Intelligibility

KW - memory

KW - Speech

UR - http://onlinelibrary.wiley.com/doi/10.1002/brb3.789/full

U2 - 10.1002/brb3.789

DO - 10.1002/brb3.789

M3 - Article

VL - 7

JO - Brain and Behavior

JF - Brain and Behavior

SN - 2162-3279

IS - 9

M1 - e00789

ER -

ID: 14579231