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BioMed Central - Auditory Processing Disorder

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Auditory Processing Disorder International Research. Absent otoacoustic emissions predict otitis media in young Aboriginal children: a birth cohort study in Aboriginal and non-Aboriginal children in an arid zone of Western Australia. To our knowledge this is the first comprehensive investigation of middle ear health (which includes hearing assessment) conducted simultaneously in young indigenous and non-indigenous children living in an urban setting, although an Australia-wide study of Aboriginal and non-Aboriginal people of all ages was conducted 30 years ago [5].

Absent otoacoustic emissions predict otitis media in young Aboriginal children: a birth cohort study in Aboriginal and non-Aboriginal children in an arid zone of Western Australia

All study participants had high rates of OM but rates were particularly high in Aboriginal children, in whom disease began at a very young age, as has been reported previously [7,9,10]. There was significant hearing loss from age 6 months onwards, particularly in Aboriginal children, one-third of whom had hearing loss >40 dB. The general lack of symptoms with such high disease burden is of concern since families would not be prompted to bring children for medical care. Comparison with other studies Prevalence The burden of OM and age-specific prevalence in non-Aboriginal children is comparable to that found in studies undertaken elsewhere [1,27,28]. Auditory encoding abnormalities in children with autism spectrum disorder suggest delayed development of auditory cortex. The present study examined the maturation of STG auditory responses in ASD.

Auditory encoding abnormalities in children with autism spectrum disorder suggest delayed development of auditory cortex

Cross-sectional findings indicated an array of abnormalities in the development of primary/secondary auditory function in children with ASD, including delayed right STG M100 responses and a reduced rate of change (and perhaps even no change) in left and right STG M200 activity as a function of age. Additional evidence indicating delayed auditory cortex maturation in ASD included atypical hemispheric functional asymmetries, including a right versus left M100 latency advantage in TDC but not ASD, and a stronger left than right M50 response in TDC but not ASD. The pattern of findings suggests the need for longitudinal studies investigating the maturation of auditory network activity in ASD, with the hypothesis that results from these studies will demonstrate delayed development of each component of the auditory processing system.

Auditory processing disorders in neurological patients and in patients with developmental disorders. In the mid 1950's, Bocca, Calearo and Cassinari (1954) made the seminal observations that patients with temporal lobe tumours complained of hearing difficulties, despite the presence of normal hearing thresholds and normal speech recognition in quiet.

Auditory processing disorders in neurological patients and in patients with developmental disorders

Around the same time, Myklebust (1954) proposed that central auditory function ought to be considered and assessed in children with communication disorders. Over the last 20-30 years, it has become increasingly recognised that impaired structure and/or function of the brain may have little or no effect on hearing thresholds, but may cause deficits in other aspects of the hearing process. Auditory temporal processing in healthy aging: a magnetoencephalographic study. Brain activity underlying auditory perceptual learning during short period training: simultaneous fMRI and EEG recording. Classification of the primary progressive aphasias: principles and review of progress since 2011.

Root diagnosis of PPA The root diagnosis of PPA is based on the objective impairment of language while other cognitive domains (episodic and topographical memory, constructional praxis, etc.) are relatively preserved [6].

Classification of the primary progressive aphasias: principles and review of progress since 2011

In the initial disease stages, impacts on the instrumental activities of daily living are entirely attributable to language problems. Confusion may arise when the root diagnostic criterion is not fulfilled and the subtyping is applied nevertheless. In that respect it is of particular importance not to confuse PPA or any of its subtypes with the left hemisphere-dominant type of clinically probable AD with prominent language symptoms, a disease entity that has been well-known for a long time [7, 8]. Comparative Laterality in (central) auditory processing disorders and dyslexia. Contribution of psychoacoustics and neuroaudiology in revealing correlation of mental disorders with central auditory processing disorders. Psychoacoustic tests Learning disabilities, attention deficit disorders and dyslexia are assessed through a great variety of psychoacoustic tests.

Contribution of psychoacoustics and neuroaudiology in revealing correlation of mental disorders with central auditory processing disorders

Age limitations have to be considered [11] and specially designed tests are used for different age groups. Effect of early onset otitis media on brainstem and cortical auditory processing. Adequate sensory experience is critical to the developing nervous system – for the expression as well as maintenance of sensory functions even when such functions are innately determined [1].

Effect of early onset otitis media on brainstem and cortical auditory processing

Development and maintenance of auditory sense is no exception. In other words, reduced auditory input, early in life, may affect auditory processing later in life. Otitis media (OM) is a common condition that results in hearing loss in early years of life. Electrical brain imaging evidences left auditory cortex involvement in speech and non-speech discrimination based on temporal features. ERP correlates of German Sign Language processing in deaf native signers. Participants Fifteen Deaf native signers (≥85db Hearing level (HL) in each ear except for one participant who had a decibel loss of ≥ 70 db HL in the left ear) participated in the experiment.

ERP correlates of German Sign Language processing in deaf native signers

Three participants had to be excluded from further analyses since they did not reach the criterion of at least 60% correct responses in all experimental conditions. fMR-adaptation indicates selectivity to audiovisual content congruency in distributed clusters in human superior temporal cortex. Subjects Sixteen healthy volunteers (6 male, mean age 22.8, range 19-32) participated in the present study.

fMR-adaptation indicates selectivity to audiovisual content congruency in distributed clusters in human superior temporal cortex

All subjects were recruited from an academic environment and had no history of reading/language problems or neurological/psychiatric disorders. All were right-handed Dutch native speakers, had normal or corrected-to-normal vision and normal hearing capacity. Subjects gave informed written consent and all procedures were approved by the local ethics committee (Faculty of Psychology, Maastricht University). Late, not early mismatch responses to changes in frequency are reduced or deviant in children with dyslexia: an event-related potential study. The current study asked: Do children with dyslexia show differences in their mismatch responses to frequency deviants during the MMN time window using (1) conventional amplitude measures and (2) time-frequency analysis?

Late, not early mismatch responses to changes in frequency are reduced or deviant in children with dyslexia: an event-related potential study

, and (3) is performance on any of these measures linked to behavioural measures of frequency discrimination, language, and literacy? We found that children with dyslexia did not differ from controls in their MMN responses to the frequency deviants and, surprisingly, that they showed greater levels of ITC (phase locking) in the time window corresponding to the MMN, particularly in the older group.

Long-term influence of recurrent acute otitis media on neural involuntary attention switching in 2-year-old children. About 30 % of children have recurrent middle ear infections (recurrent acute otitis media, RAOM) in their early childhood [1, 2].

Long-term influence of recurrent acute otitis media on neural involuntary attention switching in 2-year-old children

Due to challenges in diagnosing and classifying middle ear status, otitis media (OM) is commonly used as a general term for various forms of middle ear fluid and inflammation. A general definition for RAOM has been three or more episodes of acute otitis media (AOM) per 6 months or four or more AOM episodes per year [3]. After an episode of AOM, middle ear fluid is present for few days to over 2 months [4]. Fluid in the middle ear causes about 20–30 dB conductive hearing loss [5], and, especially when asymmetric, it affects interaural temporal and level difference cues compromising binaural sound localization [6]. Otitis media: a genome-wide linkage scan with evidence of susceptibility loci within the 17q12 and 10q22.3 regions. Otitis media in young Aboriginal children from remote communities in Northern and Central Australia: a cross-sectional survey.

This is the first study in over twenty years to document the middle ear state of young Aboriginal children from a range of remote communities in Northern and Central Australia. Unfortunately, the rates of OM (all types), TM perforation, and suppurative OM (AOM/woP, AOM/wiP or CSOM) remain extremely high. The impact of severe otitis media on hearing is likely to be significant and may contribute to poor educational and employment outcomes [18]. In this study, only 20% of children were likely to have normal hearing and did not require medical or audiological treatment. Importantly, there was considerable variation in the prevalence of perforation of the TM and suppurative OM between communities.

Phonemic and grapheme perception in Dyslexia and (Central) Auditory Processing Disorder. Pneumococcal vaccination and otitis media in Australian Aboriginal infants: comparison of two birth cohorts before and after introduction of vaccination. Study Setting Two cohorts were enrolled from three Aboriginal communities on the Tiwi islands north of Darwin (population 2,029)[15]. We compared a cohort that received pneumococcal vaccination (2001–2004) with a comparison cohort from the same communities prior to vaccine availability (1996–2001). Participants The comparison, or before vaccine group, was enrolled in a randomised controlled trial of long-term amoxicillin versus placebo between 1996 and 2001 (OM-RCT)[16].

Reduced resting-state brain activity in the default mode network in children with (central) auditory processing disorders. In this paper we examined resting-state brain activity in children with (C)APD, using two independent data-driven approaches: ReHo and ICA with different model order settings. First, we should emphasize that to date there has only been one preliminary study published which aimed to develop an fMRI procedure to examine individuals with (C)APD [5]. According to the authors’ best knowledge, this is the first study which applied rs-fMRI to investigate brain activity in (C)APD. Speech Target Modulates Speaking Induced Suppression in Auditory Cortex. Participants Ten healthy right-handed English speaking volunteers (6 males, 4 females; mean age 25 years; range: 21–42) participated in this study. All participants gave their informed consent after procedures had been fully explained.

Temporal Auditory Processing and Phonological Awareness in Children with Benign Epilepsy with Centrotemporal Spikes. The clinical course of acute otitis media in high-risk Australian Aboriginal children: a longitudinal study. Features of participants and examinations We enrolled 31 children in this study and completed 219 assessments. Clinic staff referred 13 children and other researchers referred 18 children. Children referred from the clinic were more likely to have otorrhea (8/13 versus 6/18). The effects of background white noise on memory performance in inattentive school children.