Fruzsina Soltész|Dénes Sz?cs|Victoria Leong|Sonia White|Usha Goswami
Differential Entrainment of Neuroelectric Delta Oscillations in Developmental Dyslexia
University of Cambridge|University of Cambridge|University of Cambridge|University of Cambridge|University of Cambridge
oscillatory entrainment speech signal important language processing yet studied developmental disorders language developmental dyslexia difficulty acquiring efficient reading skills linked difficulties phonology sound structure language associated behavioural entrainment deficits proposed phonological deficit characterises dyslexia across languages related impaired auditory entrainment speech lower frequencies via neuroelectric oscillations 10 hz temporal sampling theory impaired entrainment temporal modulations lower frequencies would affect recovery prosodic syllabic structure speech investigated eventrelated oscillatory eeg activity contingent negative variation cnv auditory rhythmic tone streams delivered frequencies within delta band 2 hz 15 hz relevant sampling stressed syllables speech given prior behavioural entrainment findings rates predicted functionally atypical entrainment delta oscillations dyslexia participants performed rhythmic expectancy task detecting occasional white noise targets interspersed tones occurring regularly rates 2 hz 15 hz groups showed significant entrainment delta oscillations rhythmic stimulus stream however strength intertrial delta phase coherence itc phase locking cnv significantly weaker dyslexics suggestive weaker entrainment less preparatory brain activity itc strength cnv amplitude significantly related individual differences language processing reading additionally instantaneous phase prestimulus delta oscillation predicted behavioural responding response time control participants