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https://www.readbyqxmd.com/read/28011436/phonological-abilities-in-literacy-impaired-children-brain-potentials-reveal-deficient-phoneme-discrimination-but-intact-prosodic-processing
#1
Claudia Männel, Gesa Schaadt, Franziska K Illner, Elke van der Meer, Angela D Friederici
Intact phonological processing is crucial for successful literacy acquisition. While individuals with difficulties in reading and spelling (i.e., developmental dyslexia) are known to experience deficient phoneme discrimination (i.e., segmental phonology), findings concerning their prosodic processing (i.e., suprasegmental phonology) are controversial. Because there are no behavior-independent studies on the underlying neural correlates of prosodic processing in dyslexia, these controversial findings might be explained by different task demands...
November 27, 2016: Developmental Cognitive Neuroscience
https://www.readbyqxmd.com/read/27990724/audio-visual-speech-in-noise-perception-in-dyslexia
#2
Thijs van Laarhoven, Mirjam Keetels, Lemmy Schakel, Jean Vroomen
Individuals with developmental dyslexia (DD) may experience, besides reading problems, other speech-related processing deficits. Here, we examined the influence of visual articulatory information (lip-read speech) at various levels of background noise on auditory word recognition in children and adults with DD. We found that children with a documented history of DD have deficits in their ability to gain benefit from lip-read information that disambiguates noise-masked speech. We show with another group of adult individuals with DD that these deficits persist into adulthood...
December 18, 2016: Developmental Science
https://www.readbyqxmd.com/read/27940605/temporal-processing-development-in-chinese-primary-school-aged-children-with-dyslexia
#3
Li-Chih Wang, Hsien-Ming Yang
This study aimed to investigate the development of visual and auditory temporal processing among children with and without dyslexia and to examine the roles of temporal processing in reading and reading-related abilities. A total of 362 Chinese children in Grades 1-6 were recruited from Taiwan. Half of the children had dyslexia, and the other half were typically developing children who matched the dyslexic group on age, intelligence, and gender. Our results indicate that for typically developing children, the visual and auditory modalities follow the same developmental trend: The children in first and second grades performed significantly worse than the older children...
December 9, 2016: Journal of Learning Disabilities
https://www.readbyqxmd.com/read/27890803/neural-signatures-of-phonological-deficits-in-chinese-developmental-dyslexia
#4
Fan Cao, Xin Yan, Zhao Wang, Yanni Liu, Jin Wang, Gregory J Spray, Yuan Deng
There has been debate on whether phonological deficits explain reading difficulty in Chinese, since Chinese is a logographic language which does not employ grapheme-phoneme-correspondence rules and remote memorization seems to be the main method to acquire reading. In the current study, we present neuroimaging evidence that the phonological deficit is also a signature of Chinese dyslexia. Specifically, we found that Chinese children with dyslexia (DD) showed reduced brain activation in the left dorsal inferior frontal gyrus (dIFG) when compared to both age-matched controls (AC) and reading-matched controls (RC) during an auditory rhyming judgment task...
November 24, 2016: NeuroImage
https://www.readbyqxmd.com/read/27843461/contra-lateral-auditory-brainstem-responses-in-dyslexia
#5
Mehdi Akbari, Mohammad Taghi Joghataei, Akram Noorbakht, Mohammad Sadegh Jenabi
OBJECTIVE: Developmental care comprises a wide range of medical and nursing interventions used in the neonatal intensive care unit (NICU) to mitigate and reduce stressors affecting preterm or ill neonates. Because patient satisfaction survey is a valuable quality improvement tool, we aimed to develop and test the psychometric properties of a tool for measuring parent satisfaction of developmental care in the NICU. MATERIALS &METHODS: In this psychometric methodological study, the item pool and initial questionnaire were designed based on a comprehensive literature review and exploring NICU parent satisfaction questionnaires...
2016: Iranian Journal of Child Neurology
https://www.readbyqxmd.com/read/27833037/atypical-neural-synchronization-to-speech-envelope-modulations-in-dyslexia
#6
Astrid De Vos, Sophie Vanvooren, Jolijn Vanderauwera, Pol Ghesquière, Jan Wouters
A fundamental deficit in the synchronization of neural oscillations to temporal information in speech could underlie phonological processing problems in dyslexia. In this study, the hypothesis of a neural synchronization impairment is investigated more specifically as a function of different neural oscillatory bands and temporal information rates in speech. Auditory steady-state responses to 4, 10, 20 and 40Hz modulations were recorded in normal reading and dyslexic adolescents to measure neural synchronization of theta, alpha, beta and low-gamma oscillations to syllabic and phonemic rate information...
January 2017: Brain and Language
https://www.readbyqxmd.com/read/27810845/comparison-of-regularity-detection-between-individuals-with-and-without-speech-in-noise-problems-using-electrophysiological-methods
#7
Mehmet Yaralı, Süha Yağcıoğlu, Ayşe Gül Güven, Songül Aksoy
OBJECTIVE: To analyze the cortical representations of auditory regularities and the relation between these representations and speech-in-noise (SIN) abilities and to compare two groups of participants with different SIN abilities on these cortical measures. MATERIALS AND METHODS: In total, 22 participants aged 20-40 years with normal hearing and without noise exposure, brain stem level-processing issues, neurological/psychiatric issues, or related medication were presented with three different stimuli resembling auditory regularities appearing after random sounds as well as a random series of sounds...
August 1, 2016: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/27785865/mothers-speak-differently-to-infants-at-risk-for-dyslexia
#8
Marina Kalashnikova, Usha Goswami, Denis Burnham
Dyslexia is a neurodevelopmental disorder manifested in deficits in reading and spelling skills that is consistently associated with difficulties in phonological processing. Dyslexia is genetically transmitted, but its manifestation in a particular individual is thought to depend on the interaction of epigenetic and environmental factors. We adopt a novel interactional perspective on early linguistic environment and dyslexia by simultaneously studying two pre-existing factors, one maternal and one infant, that may contribute to these interactions; and two behaviours, one maternal and one infant, to index the effect of these factors...
October 27, 2016: Developmental Science
https://www.readbyqxmd.com/read/27774757/the-influences-and-outcomes-of-phonological-awareness-a-study-of-ma-pa-and-auditory-processing-in-pre-readers-with-a-family-risk-of-dyslexia
#9
Jeremy M Law, Jan Wouters, Pol Ghesquière
The direct influence of phonological awareness (PA) on reading outcomes has been widely demonstrated, yet PA may also exert indirect influence on reading outcomes through other cognitive variables such as morphological awareness (MA). However, PA's own development is dependent and influenced by many extraneous variables such as auditory processing, which could ultimately impact reading outcomes. In a group of pre-reading children with a family risk of dyslexia and low-risk controls, this study sets out to answer questions surrounding PA's relationship at various grain sizes (syllable, onset/rime and phoneme) with measures of auditory processing (frequency modulation (FM) and an amplitude rise-time task (RT)) and MA, independent of reading experience...
October 23, 2016: Developmental Science
https://www.readbyqxmd.com/read/27761877/p300-event-related-potentials-in-children-with-dyslexia
#10
Eleni A Papagiannopoulou, Jim Lagopoulos
To elucidate the timing and the nature of neural disturbances in dyslexia and to further understand the topographical distribution of these, we examined entire brain regions employing the non-invasive auditory oddball P300 paradigm in children with dyslexia and neurotypical controls. Our findings revealed abnormalities for the dyslexia group in (i) P300 latency, globally, but greatest in frontal brain regions and (ii) decreased P300 amplitude confined to the central brain regions (Fig. 1). These findings reflect abnormalities associated with a diminished capacity to process mental workload as well as delayed processing of this information in children with dyslexia...
October 19, 2016: Annals of Dyslexia
https://www.readbyqxmd.com/read/27659413/difficulties-in-auditory-organization-as-a-cause-of-reading-backwardness-an-auditory-neuroscience-perspective
#11
Victoria Leong, Usha Goswami
Over 30 years ago, it was suggested that difficulties in the 'auditory organization' of word forms in the mental lexicon might cause reading difficulties. It was proposed that children used parameters such as rhyme and alliteration to organize word forms in the mental lexicon by acoustic similarity, and that such organization was impaired in developmental dyslexia. This literature was based on an 'oddity' measure of children's sensitivity to rhyme (e.g. wood, book, good) and alliteration (e.g. sun, sock, rag)...
September 22, 2016: Developmental Science
https://www.readbyqxmd.com/read/27551263/improving-dorsal-stream-function-in-dyslexics-by-training-figure-ground-motion-discrimination-improves-attention-reading-fluency-and-working-memory
#12
Teri Lawton
There is an ongoing debate about whether the cause of dyslexia is based on linguistic, auditory, or visual timing deficits. To investigate this issue three interventions were compared in 58 dyslexics in second grade (7 years on average), two targeting the temporal dynamics (timing) of either the auditory or visual pathways with a third reading intervention (control group) targeting linguistic word building. Visual pathway training in dyslexics to improve direction-discrimination of moving test patterns relative to a stationary background (figure/ground discrimination) significantly improved attention, reading fluency, both speed and comprehension, phonological processing, and both auditory and visual working memory relative to controls, whereas auditory training to improve phonological processing did not improve these academic skills significantly more than found for controls...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27520749/atypical-right-hemisphere-response-to-slow-temporal-modulations-in-children-with-developmental-dyslexia
#13
Simone Cutini, Dénes Szűcs, Natasha Mead, Martina Huss, Usha Goswami
Phase entrainment of neuronal oscillations is thought to play a central role in encoding speech. Children with developmental dyslexia show impaired phonological processing of speech, proposed theoretically to be related to atypical phase entrainment to slower temporal modulations in speech (<10Hz). While studies of children with dyslexia have found atypical phase entrainment in the delta band (~2Hz), some studies of adults with developmental dyslexia have shown impaired entrainment in the low gamma band (~35-50Hz)...
December 2016: NeuroImage
https://www.readbyqxmd.com/read/27471442/neural-biomarkers-for-dyslexia-adhd-and-add-in-the-auditory-cortex-of-children
#14
Bettina Serrallach, Christine Groß, Valdis Bernhofs, Dorte Engelmann, Jan Benner, Nadine Gündert, Maria Blatow, Martina Wengenroth, Angelika Seitz, Monika Brunner, Stefan Seither, Richard Parncutt, Peter Schneider, Annemarie Seither-Preisler
Dyslexia, attention deficit hyperactivity disorder (ADHD), and attention deficit disorder (ADD) show distinct clinical profiles that may include auditory and language-related impairments. Currently, an objective brain-based diagnosis of these developmental disorders is still unavailable. We investigated the neuro-auditory systems of dyslexic, ADHD, ADD, and age-matched control children (N = 147) using neuroimaging, magnetencephalography and psychoacoustics. All disorder subgroups exhibited an oversized left planum temporale and an abnormal interhemispheric asynchrony (10-40 ms) of the primary auditory evoked P1-response...
2016: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/27148102/early-stages-of-sensory-processing-but-not-semantic-integration-are-altered-in-dyslexic-adults
#15
Patrícia B Silva, Karen Ueki, Darlene G Oliveira, Paulo S Boggio, Elizeu C Macedo
The aim of this study was to verify which stages of language processing are impaired in individuals with dyslexia. For this, a visual-auditory crossmodal task with semantic judgment was used. The P100 potentials were chosen, related to visual processing and initial integration, and N400 potentials related to semantic processing. Based on visual-auditory crossmodal studies, it is understood that dyslexic individuals present impairments in the integration of these two types of tasks and impairments in processing spoken and musical auditory information...
2016: Frontiers in Psychology
https://www.readbyqxmd.com/read/27146374/novel-word-learning-reading-difficulties-and-phonological-processing-skills
#16
Marina Kalashnikova, Denis Burnham
Visual-verbal paired associate learning (PAL) refers to the ability to establish an arbitrary association between a visual referent and an unfamiliar label. It is now established that this ability is impaired in children with dyslexia, but the source of this deficit is yet to be specified. This study assesses PAL performance in children with reading difficulties using a modified version of the PAL paradigm, comprising a comprehension and a production phase, to determine whether the PAL deficit lies in children's ability to establish and retain novel object-novel word associations or their ability to retrieve the learned novel labels for production...
May 2016: Dyslexia: the Journal of the British Dyslexia Association
https://www.readbyqxmd.com/read/27135368/acquired-dyslexia-in-serbian-speakers-with-broca-s-and-wernicke-s-aphasia
#17
Mile Vuković, Irena Vuković, Nick Miller
This study examined patterns of acquired dyslexia in Serbian aphasic speakers, comparing profiles of groups with Broca's versus Wernicke's aphasia. The study also looked at the relationship of reading and auditory comprehension and between reading comprehension and reading aloud in these groups. Participants were 20 people with Broca's and 20 with Wernicke's aphasia. They were asked to read aloud and to understand written material from the Serbian adaptation of the Boston Diagnostic Aphasia Examination. A Serbian Word Reading Aloud Test was also used...
May 2016: Journal of Communication Disorders
https://www.readbyqxmd.com/read/27131343/auditory-evoked-potentials-to-speech-and-nonspeech-stimuli-are-associated-with-verbal-skills-in-preschoolers
#18
Soila Kuuluvainen, Alina Leminen, Teija Kujala
Children's obligatory auditory event-related potentials (ERPs) to speech and nonspeech sounds have been shown to associate with reading performance in children at risk or with dyslexia and their controls. However, very little is known of the cognitive processes these responses reflect. To investigate this question, we recorded ERPs to semisynthetic syllables and their acoustically matched nonspeech counterparts in 63 typically developed preschoolers, and assessed their verbal skills with an extensive set of neurocognitive tests...
June 2016: Developmental Cognitive Neuroscience
https://www.readbyqxmd.com/read/27122044/knockdown-of-dyslexia-gene-dcdc2-interferes-with-speech-sound-discrimination-in-continuous-streams
#19
Tracy Michelle Centanni, Anne B Booker, Fuyi Chen, Andrew M Sloan, Ryan S Carraway, Robert L Rennaker, Joseph J LoTurco, Michael P Kilgard
UNLABELLED: Dyslexia is the most common developmental language disorder and is marked by deficits in reading and phonological awareness. One theory of dyslexia suggests that the phonological awareness deficit is due to abnormal auditory processing of speech sounds. Variants in DCDC2 and several other neural migration genes are associated with dyslexia and may contribute to auditory processing deficits. In the current study, we tested the hypothesis that RNAi suppression of Dcdc2 in rats causes abnormal cortical responses to sound and impaired speech sound discrimination...
April 27, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27115239/development-of-a-pitch-discrimination-screening-test-for-preschool-children
#20
Maria Kulick Abramson, Peter J Lloyd
BACKGROUND: There is a critical need for tests of auditory discrimination for young children as this skill plays a fundamental role in the development of speaking, prereading, reading, language, and more complex auditory processes. Frequency discrimination is important with regard to basic sensory processing affecting phonological processing, dyslexia, measurements of intelligence, auditory memory, Asperger syndrome, and specific language impairment. PURPOSE: This study was performed to determine the clinical feasibility of the Pitch Discrimination Test (PDT) to screen the preschool child's ability to discriminate some of the acoustic demands of speech perception, primarily pitch discrimination, without linguistic content...
April 2016: Journal of the American Academy of Audiology
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