Abstract：
:Perception of speech at multiple temporal scales is important for the efficient extraction of meaningful phonological elements. Individuals with developmental dyslexia have difficulty in the accurate neural representation of phonological aspects of speech, across languages. Recently, it was proposed that these difficulties might arise in part because of impaired phase locking to the slower modulations in the speech signal (<10 Hz), which would affect syllabic parsing and segmentation of the speech stream (the "temporal sampling" hypothesis, Goswami, 2011). Here we measured MEG responses to different rates of amplitude modulated white noise in adults with and without dyslexia. In line with the temporal sampling hypothesis, different patterns of phase locking to amplitude modulation at the delta rate of 2 Hz were found when comparing participants with dyslexia to typically-reading participants. Typical readers exhibited better phase locking to slow modulations in right auditory cortex, whereas adults with dyslexia showed more bilateral phase locking. The results suggest that oscillatory phase locking mechanisms for slower temporal modulations are atypical in developmental dyslexia.
journal_name
Neuroimagejournal_title
NeuroImageauthors
Hämäläinen JA,Rupp A,Soltész F,Szücs D,Goswami Udoi
10.1016/j.neuroimage.2011.09.075subject
Has Abstractpub_date
2012-02-01 00:00:00pages
2952-61issue
3eissn
1053-8119issn
1095-9572pii
S1053-8119(11)01150-5journal_volume
59pub_type
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