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central auditory processing disorder

Rajkishor Mishra, Himanshu Kumar Sanju, Prawin Kumar
Introduction "Diabetes mellitus is a group of metabolic disorders characterized by elevated blood sugar and abnormalities in insulin secretion and action" (American Diabetes Association). Previous literature has reported connection between diabetes mellitus and hearing impairment. There is a dearth of literature on auditory temporal resolution ability in individuals with diabetes mellitus type 2. Objective The main objective of the present study was to assess auditory temporal resolution ability through GDT (Gap Detection Threshold) in individuals with diabetes mellitus type 2 with high frequency hearing loss...
October 2016: International Archives of Otorhinolaryngology
Xiaoran Ma, Bradley McPherson, Lian Ma
OBJECTIVES: Cleft lip and/or palate is a common congenital craniofacial malformation found worldwide. A frequently associated disorder is conductive hearing loss, and this disorder has been thoroughly investigated in children with non-syndromic cleft lip and/or palate (NSCL/P). However, analysis of auditory processing function is rarely reported for this population, although this issue should not be ignored since abnormal auditory cortical structures have been found in populations with cleft disorders...
2016: PeerJ
Yones Lotfi, Abdollah Moosavi, Farzaneh Zamiri Abdollahi, Enayatollah Bakhshi, Hamed Sadjedi
BACKGROUND AND OBJECTIVES: Central auditory processing disorder [(C)APD] refers to a deficit in auditory stimuli processing in nervous system that is not due to higher-order language or cognitive factors. One of the problems in children with (C)APD is spatial difficulties which have been overlooked despite their significance. Localization is an auditory ability to detect sound sources in space and can help to differentiate between the desired speech from other simultaneous sound sources...
September 2016: Journal of Audiology & Otology
Dani Tomlin, Gary Rance
Neurodevelopmental delay has been proposed as the underlying cause of the majority of cases of auditory processing disorder (APD). The current study employs the cortical auditory evoked potential (CAEP) to assess if maturational differences of the central auditory nervous system (CANS) can be identified between children who do and do not meet the diagnostic criterion for APD. The P1-N1 complex of the CAEP has previously been used for tracking development of the CANS in children with hearing impairment. Twenty-seven children (7 to 12 years old) who failed an APD behavioral test battery were age-matched (within 3 months) to children who had passed the same battery...
February 2016: Seminars in Hearing
Sharon Cameron, Helen Glyde, Harvey Dillon, Alison King, Karin Gillies
This article describes the development and evaluation of a national service to diagnose and remediate central auditory processing disorder (CAPD). Data were gathered from 38 participating Australian Hearing centers over an 18-month period from 666 individuals age 6, 0 (years, months) to 24, 8 (median 9, 0). A total of 408 clients were diagnosed with either a spatial processing disorder (n = 130), a verbal memory deficit (n = 174), or a binaural integration deficit (n = 104). A hierarchical test protocol was used so not all children were assessed on all tests in the battery...
November 2015: Seminars in Hearing
Jeffrey Weihing, Gail D Chermak, Frank E Musiek
Auditory training (AT) is an important component of rehabilitation for patients with central auditory processing disorder (CAPD). The present article identifies and describes aspects of AT as they relate to applications in this population. A description of the types of auditory processes along with information on relevant AT protocols that can be used to address these specific deficits is included. Characteristics and principles of effective AT procedures also are detailed in light of research that reflects on their value...
November 2015: Seminars in Hearing
Yuko Yoshimura, Mitsuru Kikuchi, Hirotoshi Hiraishi, Chiaki Hasegawa, Tetsuya Takahashi, Gerard B Remijn, Manabu Oi, Toshio Munesue, Haruhiro Higashida, Yoshio Minabe
The auditory-evoked P1m, recorded by magnetoencephalography, reflects a central auditory processing ability in human children. One recent study revealed that asynchrony of P1m between the right and left hemispheres reflected a central auditory processing disorder (i.e., attention deficit hyperactivity disorder, ADHD) in children. However, to date, the relationship between auditory P1m right-left hemispheric synchronization and the comorbidity of hyperactivity in children with autism spectrum disorder (ASD) is unknown...
2016: NeuroImage: Clinical
Dekel Ben-Yosef, David Anaki, Ofer Golan
The ability of individuals with Autism Spectrum Disorder (ASD) to process context has long been debated: According to the Weak Central Coherence theory, ASD is characterized by poor global processing, and consequently-poor context processing. In contrast, the Social Cognition theory argues individuals with ASD will present difficulties only in social context processing. The complexity theory of autism suggests context processing in ASD will depend on task complexity. The current study examined this controversy through two priming tasks, one presenting human stimuli (facial expressions) and the other presenting non-human stimuli (animal faces)...
August 3, 2016: Autism Research: Official Journal of the International Society for Autism Research
Aleksander A Aleksandrov, Elena S Dmitrieva, Ludmila N Stankevich, Veronika M Knyazeva, Anna N Shestakova
Our aim was to study the influence of fatigue development on sensory gating during a muscle load. The fatiguing task was sustained contraction of a handgrip dynamometer with 7 and 30% maximum voluntary contraction (MVC). The suppression of P50, an auditory event-related potential, was used as the sensory gating index in the paired-click paradigm with a 500 ms interstimulus interval; the difference between the P50 amplitudes of the first and the second stimuli of the pair was used as the sensory gating index...
2016: Frontiers in Systems Neuroscience
Natalie Steube, Manuela Nowotny, Peter K D Pilz, Bernhard H Gaese
The acoustic startle response (ASR) and its modulation by non-startling prepulses, presented shortly before the startle-eliciting stimulus, is a broadly applied test paradigm to determine changes in neural processing related to auditory or psychiatric disorders. Modulation by a gap in background noise as a prepulse is especially used for tinnitus assessment. However, the timing and frequency-related aspects of prepulses are not fully understood. The present study aims to investigate temporal and spectral characteristics of acoustic stimuli that modulate the ASR in rats and gerbils...
2016: Frontiers in Behavioral Neuroscience
Carolina Sánchez-Rodríguez, Eduardo Martín-Sanz, Esperanza Cuadrado, Juan José Granizo, Ricardo Sanz-Fernández
UNLABELLED: Age-related hearing loss (AHL) -presbycusis- is the number one neurodegenerative disorder and top communication deficit of our aged population. Experimental evidence suggests that mitochondrial dysfunction associated with reactive oxygen species (ROS) plays a central role in the aging process of cochlear cells. Dietary antioxidants, in particular polyphenols, have been found to be beneficial in protecting against the generation of ROS in various diseases associated with oxidative stress, such as cancer, neurodegenerative diseases and aging...
October 2016: Experimental Gerontology
Sharon Cameron, Helen Glyde, Harvey Dillon, Jessica Whitfield
BACKGROUND: The Dichotic Digits difference Test (DDdT) was developed to investigate the relationship between dichotic processing and cognitive abilities and, through the use of differential test scores, to provide professionals with a clinical tool that could aid in differentiation of clients with genuine dichotic deficits from those where cognitive disorders affect test performance. The DDdT consists of four subtests: dichotic free recall (FR), dichotic directed left ear, dichotic directed right ear, and diotic...
June 2016: Journal of the American Academy of Audiology
Sharon Cameron, Helen Glyde, Harvey Dillon, Jessica Whitfield, John Seymour
BACKGROUND: The dichotic digits test is one of the most widely used assessment tools for central auditory processing disorder. However, questions remain concerning the impact of cognitive factors on test results. PURPOSE: To develop the Dichotic Digits difference Test (DDdT), an assessment tool that could differentiate children with cognitive deficits from children with genuine dichotic deficits based on differential test results. The DDdT consists of four subtests: dichotic free recall (FR), dichotic directed left ear (DLE), dichotic directed right ear (DRE), and diotic...
June 2016: Journal of the American Academy of Audiology
Wibke Singer, Hyun-Soon Geisler, Rama Panford-Walsh, Marlies Knipper
In sensory systems, a balanced excitatory and inhibitory circuit along the ascending pathway is not only important for the establishment of topographically ordered connections from the periphery to the cortex but also for temporal precision of signal processing. The accomplishment of spatial and temporal cortical resolution in the central nervous system is a process that is likely initiated by the first sensory experiences that drive a period of increased intracortical inhibition. In the auditory system, the time of first sensory experience is also the period in which a reorganization of cochlear efferent and afferent fibers occurs leading to the mature innervation of inner and outer hair cells...
2016: Methods in Molecular Biology
Raquel Prestes, Adriana de Andrade Neves, Renata Beatriz Fernandes Santos, Andrea Tortosa Marangoni, Ana Maria Schiefer, Daniela Gil
INTRODUCTION: Stuttering is a speech fluency disorder, and may be associated with neuroaudiological factors linked to central auditory processing, including changes in auditory processing skills and temporal resolution. OBJECTIVE: To characterize the temporal processing and long-latency auditory evoked potential in stutterers and to compare them with non-stutterers. METHODS: The study included 41 right-handed subjects, aged 18-46 years, divided into two groups: stutterers (n=20) and non-stutters (n=21), compared according to age, education, and sex...
April 28, 2016: Brazilian Journal of Otorhinolaryngology
Jung-Sub Park, Christopher R Cederroth, Vasiliki Basinou, Inna Meltser, Gabriella Lundkvist, Barbara Canlon
UNLABELLED: Circadian rhythms regulate bodily functions within 24 h and long-term disruptions in these rhythms can cause various diseases. Recently, the peripheral auditory organ, the cochlea, has been shown to contain a self-sustained circadian clock that regulates differential sensitivity to noise exposure throughout the day. Animals exposed to noise during the night are more vulnerable than when exposed during the day. However, whether other structures throughout the auditory pathway also possess a circadian clock remains unknown...
May 18, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
Chris Sidiras, Vasiliki Vivian Iliadou, Gail D Chermak, Ioannis Nimatoudis
BACKGROUND: Including speech recognition in noise testing in audiological evaluations may reveal functional hearing deficits that may otherwise remain undetected. PURPOSE: The current study explored the potential utility of the Speech-in-Babble (SinB) test in the assessment of central auditory processing disorder (CAPD) in young children for whom diagnosis is challenging. RESEARCH DESIGN: A cross-sectional analysis. STUDY SAMPLE: Forty-one Greek children 4-13 yr of age diagnosed with CAPD and exhibiting listening and academic problems (clinical group) and 20 age-matched controls with no listening or academic problems participated in the study...
May 2016: Journal of the American Academy of Audiology
Bun-Hee Lee, Young-Min Park
OBJECTIVE: The aims of this study were to determine whether childhood maltreatment contributes to the occurrence of major depressive disorder (MDD) with bipolarity, and whether there is a relationship between central serotonergic activity, as assessed using loudness dependence of auditory evoked potentials (LDAEP), and childhood maltreatment. METHODS: Thirty-five MDD patients were stratified according to the presence or absence of childhood trauma into two subgroups, childhood trauma (CT) and no childhood trauma (NCT), using the Korean version of the Childhood Trauma Questionnaire (K-CTQ)...
March 2016: Psychiatry Investigation
Toshiharu Kurita, Mitsuru Kikuchi, Yuko Yoshimura, Hirotoshi Hiraishi, Chiaki Hasegawa, Tetsuya Takahashi, Tetsu Hirosawa, Naoki Furutani, Haruhiro Higashida, Takashi Ikeda, Kouhei Mutou, Minoru Asada, Yoshio Minabe
Autism spectrum disorder (ASD) has been postulated to involve impaired neuronal cooperation in large-scale neural networks, including cortico-cortical interhemispheric circuitry. In the context of ASD, alterations in both peripheral and central auditory processes have also attracted a great deal of interest because these changes appear to represent pathophysiological processes; therefore, many prior studies have focused on atypical auditory responses in ASD. The auditory evoked field (AEF), recorded by magnetoencephalography, and the synchronization of these processes between right and left hemispheres was recently suggested to reflect various cognitive abilities in children...
2016: PloS One
G Bastanza, R Gallus, M De Carlini, P M Picciotti, E Muzzi, E Ciciriello, E Orzan, G Conti
Diagnosis of child permanent hearing impairment (PHI) can be made with extreme timeliness compared to the past thanks to improvements in PHI identification through newborn hearing screening programmes. It now becomes essential to provide an effective amplification as quickly as possible in order to restore auditory function and favour speech and language development. The early fitting of hearing aids and possible later cochlear implantation indeed prompts the development of central auditory pathways, connections with secondary sensory brain areas, as well as with motor and articulatory cortex...
February 2016: Acta Otorhinolaryngologica Italica
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