Page 129 - MEGIN Book Of Abstracts - 2023

risk for dyslexia across the sensitive period of native group difference in active categorical perception of this
phoneme learning. Using magnetoencephalography continuum in either of our two behavioral assessments.
(MEG), we found deficient auditory sampling at theta During passive listening, adults with dyslexia exhibited
in at-risk infants at both 6 and 12 months, indicating neural responses that were as consistent as those of
atypical auditory sampling at the syllabic rate in those typically reading adults in six cortical regions associ-
infants across the sensitive period for native-language ated with auditory perception, language, and reading.
phoneme learning. This interpretation is supported by However, they exhibited significantly less consistency
our additional finding that auditory sampling at theta in the left supramarginal gyrus, where greater incon-
predicted later vocabulary comprehension, nonlinguis- sistency correlated significantly with worse decoding
tic communication and the ability to combine words. skills in the group with dyslexia. The group difference
Our results indicate a possible early marker of risk for in the left supramarginal gyrus was evident only when
dyslexia. neural data were binned with a high temporal resolu-
tion and was only significant during the passive condi-
Keywords: MEG, auditory, dyslexia, infant, temporal sam- tion. Interestingly, consistency significantly improved
pling in both groups during active categorization versus
passive listening. These findings suggest that adults
International journal of environmental research and with dyslexia exhibit typical levels of neural consistency
public health (2022), Vol. 19, No. 3 (35162202) (1 citation) in response to speech sounds with the exception of
the left supramarginal gyrus and that this consistency
increases during active versus passive perception of
Categorical perception and influence of attention speech sounds similarly in the two groups.
on neural consistency in response to speech sounds
in adults with dyslexia (2022) Keywords: Attention, Auditory, MEG, Representation,
Temporal precision, Variability
Centanni, T M; Beach, S D; Ozernov-Palchik, O; May, S;
Pantazis, D; Gabrieli, J D E Annals of dyslexia (2022), Vol. 72, No. 1 (34495457) (1
citation)
Department of Psychology, Texas Christian University, Fort
Worth, TX, USA. [email protected]; Program in Speech
and Hearing Bioscience and Technology, Harvard University, Neural entrainment to speech and nonspeech in
Cambridge, MA, USA; McGovern Institute for Brain Research dyslexia: Conceptual replication and extension of
and Department of Brain and Cognitive Sciences, Massachu- previous investigations (2021)
setts Institute of Technology, Cambridge, MA, USA; Boston
College, Boston, MA, USA Lizarazu, Mikel; Scotto di Covella, Lou; van Wassenhove,
Virginie; Rivière, Denis; Mizzi, Raphael; Lehongre, Katia;
ABSTRACT Developmental dyslexia is a common neu- Hertz-Pannier, Lucie; Ramus, Franck
rodevelopmental disorder that is associated with altera-
tions in the behavioral and neural processing of speech Laboratoire de Sciences Cognitives et Psycholinguistique,
sounds, but the scope and nature of that association Département d'Etudes Cognitives, Ecole Normale Supérieure,
is uncertain. It has been proposed that more variable EHESS, CNRS, PSL University Paris, France; BCBL, Basque
auditory processing could underlie some of the core Center on Cognition, Brain and Language, Donostia/San Se-
deficits in this disorder. In the current study, magne- bastian, Spain. Electronic address: [email protected]; Cog-
toencephalography (MEG) data were acquired from nitive Neuroimaging Unit, CEA, INSERM, Université Paris-Sud,
adults with and without dyslexia while they passively Université Paris-Saclay, NeuroSpin Center Gif/Yvette, France;
listened to or actively categorized tokens from a /ba/-/ Laboratoire de Sciences Cognitives et Psycholinguistique,
da/ consonant continuum. We observed no significant Département d'Etudes Cognitives, Ecole Normale Supérieure,

 ontents  Index 108
C