The Experts below are selected from a list of 48633 Experts worldwide ranked by ideXlab platform
Masumi Inagaki - One of the best experts on this subject based on the ideXlab platform.
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Auditory Perception in Auditory neuropathy: clinical similarity with Auditory verbal agnosia.
Brain & development, 2002Co-Authors: Makiko Kaga, Kaori Kon, Akira Uno, Toshihiro Horiguchi, Hitoshi Yoneyama, Masumi InagakiAbstract:The precise features of Auditory Perception in patients with Auditory neuropathy have not been well described. In the present study, we examined Auditory Perception in a patient with Auditory neuropathy. The patient was a right-handed 7-year-old boy. His chief complaint was delayed speech and suspected of verbal learning disability. He could talk, read and repeat rather fluently but could not understand fully what was asked. V-IQ, P-IQ and F-IQ of Wechsler Scale for Children III-R were 53, 118 and 81, respectively. Pure tone audiogram was completely normal. His speech discrimination ability was very poor. He could identify environmental sounds with visual matching. He could differentiate intensity difference but not time difference. This phenomenon was reported in patients with hemispheric symptoms. These clinical features are very similar to verbal Auditory agnosia. ABR showed no response at 90dBnHL alternating clicks and tone bursts. Click evoked and distortion product otoacoustic emissions (OAE) were normal. Electrocochleogram was also normal. Motor and sensory nerve conduction velocity was completely normal. Pa of MLR and N1 of SVR were present. His diagnosis should be "pure type" of Auditory neuropathy or Auditory nerve disease. Importance of both ABR and OAE examination should be widely announced and Auditory neuropathy must be campaigned stressed to be clinical entity among personnel who take care of children with speech delay.
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case report Auditory Perception in Auditory neuropathy clinical similarity with Auditory verbal agnosia
2002Co-Authors: Makiko Kaga, Kaori Kon, Akira Uno, Toshihiro Horiguchi, Hitoshi Yoneyama, Masumi InagakiAbstract:The precise features of Auditory Perception in patients with Auditory neuropathy have not been well described. In the present study, we examined Auditory Perception in a patient with Auditory neuropathy. The patient was a right-handed 7-year-old boy. His chief complaint was delayed speech and suspected of verbal learning disability. He could talk, read and repeat rather fluently but could not understand fully what was asked. V-IQ, P-IQ and F-IQ of Wechsler Scale for Children III-R were 53, 118 and 81, respectively. Pure tone audiogram was completely normal. His speech discrimination ability was very poor. He could identify environmental sounds with visual matching. He could differentiate intensity difference but not time difference. This phenomenon was reported in patients with hemispheric symptoms. These clinical features are very similar to verbal Auditory agnosia. ABR showed no response at 90dBnHL alternating clicks and tone bursts. Click evoked and distortion product otoacoustic emissions (OAE) were normal. Electrocochleogram was also normal. Motor and sensory nerve conduction velocity was completely normal. Pa of MLR and N1 of SVR were present. His diagnosis should be ‘pure type’ of Auditory neuropathy or Auditory nerve disease. Importance of both ABR and OAE examination should be widely announced and Auditory neuropathy must be campaigned stressed to be clinical entity among personnel who take care of children with speech delay. q 2002 Elsevier Science B.V. All rights reserved.
Sven Vanneste - One of the best experts on this subject based on the ideXlab platform.
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from sensation to percept the neural signature of Auditory event related potentials
Neuroscience & Biobehavioral Reviews, 2014Co-Authors: Kathleen Joos, Annick Gilles, Paul Van De Heyning, Dirk De Ridder, Sven VannesteAbstract:An external Auditory stimulus induces an Auditory sensation which may lead to a conscious Auditory Perception. Although the sensory aspect is well known, it is still a question how an Auditory stimulus results in an individual's conscious percept. To unravel the uncertainties concerning the neural correlates of a conscious Auditory percept, event-related potentials may serve as a useful tool. In the current review we mainly wanted to shed light on the perceptual aspects of Auditory processing and therefore we mainly focused on the Auditory late-latency responses. Moreover, there is increasing evidence that Perception is an active process in which the brain searches for the information it expects to be present, suggesting that Auditory Perception requires the presence of both bottom-up, i.e. sensory and top-down, i.e. prediction-driven processing. Therefore, the Auditory evoked potentials will be interpreted in the context of the Bayesian brain model, in which the brain predicts which information it expects and when this will happen. The internal representation of the Auditory environment will be verified by sensation samples of the environment (P50, N100). When this incoming information violates the expectation, it will induce the emission of a prediction error signal (Mismatch Negativity), activating higher-order neural networks and inducing the update of prior internal representations of the environment (P300).
Makiko Kaga - One of the best experts on this subject based on the ideXlab platform.
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Auditory agnosia in children after herpes encephalitis
Acta Oto-laryngologica, 2003Co-Authors: Kimitaka Kaga, Makiko Kaga, Fumi Tamai, Mitsuko ShindoAbstract:Four pediatric patients whose bilateral Auditory cortices were damaged by herpes encephalitis at an early age were studied. Their brain CT and MRI scans demonstrated common bilateral lesions of the Auditory cortices. Their Auditory Perception was investigated by means of behavioral and objective hearing tests and Auditory Perception tests. All four patients showed mild or moderate hearing loss in the behavioral hearing test and normal Auditory brainstem responses but did not manifest total deafness. Moreover, Perception tests involving speech, environmental sounds and music demonstrated that most Auditory Perception ability had been lost in all patients. On reaching school age, the patients were enrolled in schools for the deaf or special schools for handicapped children.
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Auditory Perception in Auditory neuropathy: clinical similarity with Auditory verbal agnosia.
Brain & development, 2002Co-Authors: Makiko Kaga, Kaori Kon, Akira Uno, Toshihiro Horiguchi, Hitoshi Yoneyama, Masumi InagakiAbstract:The precise features of Auditory Perception in patients with Auditory neuropathy have not been well described. In the present study, we examined Auditory Perception in a patient with Auditory neuropathy. The patient was a right-handed 7-year-old boy. His chief complaint was delayed speech and suspected of verbal learning disability. He could talk, read and repeat rather fluently but could not understand fully what was asked. V-IQ, P-IQ and F-IQ of Wechsler Scale for Children III-R were 53, 118 and 81, respectively. Pure tone audiogram was completely normal. His speech discrimination ability was very poor. He could identify environmental sounds with visual matching. He could differentiate intensity difference but not time difference. This phenomenon was reported in patients with hemispheric symptoms. These clinical features are very similar to verbal Auditory agnosia. ABR showed no response at 90dBnHL alternating clicks and tone bursts. Click evoked and distortion product otoacoustic emissions (OAE) were normal. Electrocochleogram was also normal. Motor and sensory nerve conduction velocity was completely normal. Pa of MLR and N1 of SVR were present. His diagnosis should be "pure type" of Auditory neuropathy or Auditory nerve disease. Importance of both ABR and OAE examination should be widely announced and Auditory neuropathy must be campaigned stressed to be clinical entity among personnel who take care of children with speech delay.
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case report Auditory Perception in Auditory neuropathy clinical similarity with Auditory verbal agnosia
2002Co-Authors: Makiko Kaga, Kaori Kon, Akira Uno, Toshihiro Horiguchi, Hitoshi Yoneyama, Masumi InagakiAbstract:The precise features of Auditory Perception in patients with Auditory neuropathy have not been well described. In the present study, we examined Auditory Perception in a patient with Auditory neuropathy. The patient was a right-handed 7-year-old boy. His chief complaint was delayed speech and suspected of verbal learning disability. He could talk, read and repeat rather fluently but could not understand fully what was asked. V-IQ, P-IQ and F-IQ of Wechsler Scale for Children III-R were 53, 118 and 81, respectively. Pure tone audiogram was completely normal. His speech discrimination ability was very poor. He could identify environmental sounds with visual matching. He could differentiate intensity difference but not time difference. This phenomenon was reported in patients with hemispheric symptoms. These clinical features are very similar to verbal Auditory agnosia. ABR showed no response at 90dBnHL alternating clicks and tone bursts. Click evoked and distortion product otoacoustic emissions (OAE) were normal. Electrocochleogram was also normal. Motor and sensory nerve conduction velocity was completely normal. Pa of MLR and N1 of SVR were present. His diagnosis should be ‘pure type’ of Auditory neuropathy or Auditory nerve disease. Importance of both ABR and OAE examination should be widely announced and Auditory neuropathy must be campaigned stressed to be clinical entity among personnel who take care of children with speech delay. q 2002 Elsevier Science B.V. All rights reserved.
Carine Michel - One of the best experts on this subject based on the ideXlab platform.
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modifying Auditory Perception with prisms aftereffects of prism adaptation on a wide Auditory spectrum in musicians and nonmusicians
Acta Psychologica, 2021Co-Authors: Clémence Bonnet, Patrick Bard, Benedicte Poulincharronnat, Carine MichelAbstract:Prism adaptation consists of pointing to visual targets while wearing prisms that shift the visual field laterally. The aftereffects are not restricted to sensorimotor level but extend to spatial cognition. There is a link between spatial representation and Auditory frequency, with an association of low frequencies on the left side and high frequencies on the right side of space. The present study aimed first at evaluating the representation of Auditory frequencies on a wide range of frequencies in musicians and nonmusicians. We used the 'Auditory interval bisection judgment' within three Auditory intervals. The results showed a pseudoneglect behavior in pretest in musicians and nonmusicians for high frequency intervals, reflecting a perceptual bias of the subjective interval center toward lower frequencies. The second aim of the present study was to evaluate the aftereffects of prism adaptation on an expanded Auditory spectrum. The results showed aftereffects of adaptation to a leftward optical deviation for high frequency intervals in musicians and nonmusicians. Adaptation to a leftward optical deviation affects the Auditory Perception on an extended Auditory spectrum, by shifting the subjective interval center toward high frequencies. The present study provides innovative data about representation of Auditory Perception and its modulation by prism adaptation.
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Wearing prisms to hear differently: After-effects of prism adaptation on Auditory Perception
Cortex, 2019Co-Authors: Carine Michel, Clémence Bonnet, Baptiste Podor, Patrick Bard, Bénédicte Poulin-charronnatAbstract:Numerous studies showed that, after adaptation to a leftward optical deviation, pseudone-glect behavior (overrepresentation of the left part compared to the right part of the space) becomes neglect-like behavior (overrepresentation of the right part compared to the left part of the space). Cognitive after-effects have also been shown in cognitive processes that are not intrinsically spatial in nature, but show spatial association as numbers or letters. The space-Auditory frequency association (with low frequencies on the left and high frequencies on the right) raises the question of whether prism adaptation can produce after-effects on Auditory Perception. We used a new experimental protocol, named the 'Auditory interval bisection judgment', where participants had to estimate what limit of an Auditory interval (low or high) a target frequency was closer to. We calculated the subjective Auditory interval center. In pre-test, there was a spontaneous bias of the subjective center of the Auditory interval toward the lower limit. That was the first demonstration of pseudoneglect behavior in Auditory frequency representation. ANOVA realized on all participants did not show significant results of prism adaptation, but a posteriori analyses on musicians showed that, after adaptation to a leftward optical deviation, there were more target frequencies perceived as closer to the lower limit of the Auditory interval. This result corroborates the shift of the subjective center of the Auditory interval toward high frequency limit. These innovative results are discussed in terms of pu-tative neural substrates underpinning the transfer of visuomotor plasticity to Auditory frequency Perception.
Craig A Buchman - One of the best experts on this subject based on the ideXlab platform.
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the electrically evoked cortical Auditory event related potential in children with Auditory brainstem implants
Ear and Hearing, 2015Co-Authors: Holly F B Teagle, Matthew G Ewend, Lillian Henderson, Craig A BuchmanAbstract:Objective This study explored the feasibility of measuring electrically evoked cortical Auditory event-related potentials (eERPs) in children with Auditory brainstem implants (ABIs). Design Five children with unilateral ABIs ranging in age from 2.8 to 10.2 years (mean: 5.2 years) participated in this study. The stimulus was a 100-msec biphasic pulse train that was delivered to individual electrodes in a monopolar stimulation mode. Electrophysiological recordings of the onset eERP were conducted in all subjects. Results The onset eERP was recorded in four subjects who demonstrated Auditory Perception. These eERP responses showed variations in waveform morphology across subjects and stimulating electrode locations. No eERPs were observed in one subject who received no Auditory sensation from ABI stimulation. Conclusions eERPs can be recorded in children with ABIs who develop Auditory Perception. The morphology of the eERP can vary across subjects and also across stimulating electrode locations within subjects.