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Results for “Auditory Perceptual Disorders”

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At least 19 recordsLinked to original sources
PubMed1977

The performance of children with auditory perceptual disorders on a time-compressed speech discrimination measure.

A time-compressed version of the PB-K 50 speech discrimination measure was administered to 20 children diagnosed as displaying auditory perceptual disorders. Results indicated that these children performed equally well at both 0 and 30% time compression. Performance decreased significantly at 60% time compression. Comparison of the results with normative data indicated that performance of the two groups of children was similar at the 30% time compression condition but that children with auditory perceptual disorders performed poorer at both 0 and 60% time compression. The results were discussed relative to short-term memory abilities.

Auditory Perception↗
PubMed1992

The predictive validity and accuracy of a screening test for language delay and auditory perceptual disorder.

Infants (321) who had been screened for language delay and auditory perceptual problems at 9 months of age were evaluated 1 year later. Of these infants 88.6% were correctly classified as at-risk or not-at-risk of delayed linguistic development. The correlation between performance on the screen and on a language scale was 0.49. The great majority of those with receptive and expressive delay continued to show problems at 2 years of age, whereas half of those with expressive delay alone were within normal limits. No evidence was found that a history of fluctuating hearing loss contributed to the development of either language delay or auditory perceptual problems.

Auditory Perceptual Disorders↗
PubMed1990

[Fluctuating perceptual hearing disorders].

The author presents a characteristic of a fluctuating perception hearing disorder of unknown aetiology. The disease is considered a special nosological unit. Two examples are given. In the discussion the author analyzes the literature pertaining to the aetiology of the disease.

Auditory Perceptual Disorders↗
PubMed1991

Central auditory processing disorder: a case study.

We carried out extensive audiologic, electrophysiologic, and neuropsychologic testing on a young woman who complained that she had difficulty hearing in her educational environment. Conventional audiometric results, including pure-tone, speech, and immittance audiometry, were all within normal limits. The subject performed normally on tests involving the processing of rapidly changing temporal information, interaural time and intensity difference detection, and both absolute and relative sound localization. Early, middle, late and task-related auditory evoked potentials were essentially normal, although some asymmetry was observed in the middle latency (MLR) and late (LVR) responses. There was, however, a consistent left-ear deficit on dichotic sentence identification, on threshold and suprathreshold speech measures in the left sound field when various types of competition were delivered in the right sound field, and on cued-target identification in the left sound field in the presence of multitalker babble. Results suggest a central auditory processing disorder characterized by an asymmetric problem in the processing of binaural, noncoherent signals in auditory space. When auditory space was structured such that the target was directed to the left ear, and the competition to the right ear, unwanted background was less successfully suppressed than when the physical arrangement was reversed.

Acoustic Impedance Tests↗
PubMed1989

Frequency-specific auditory brainstem response analysis of young normal, aged normal and aged alcohol-addicted rats.

Normative data for frequency-specific (+/- 100 Hz) auditory brainstem response (ABR) thresholds were determined in 60 normal healthy 3-month-old, 5 normal 22-month-old and 6 alcohol-addicted 22-month-old Sprague Dawley rats. The highest degree of auditory sensitivity was in the range of 12-20 kHz. These frequencies showed significant mean differences between the 3-month-old and the old normal rats. In contrast, alcohol-addicted old rats did not reveal any significant threshold changes as compared with either normal old or 3-month-old rats.

Aging↗
PubMed1990

Central auditory processing in normal-hearing elderly adults.

Central auditory and linguistic functions were assessed in a group of 25 essentially normal-hearing, cognitively intact elderly adults. Inclusion in the study required normal performance on the Mini-Mental State Examination Procedures used to evaluate central auditory performance included monosyllabic word lists, the Synthetic Sentence Identification-Ipsilateral Competing Message (SSI-ICM) test, the Dichotic Digits test and the Staggered Spondaic Word test. Linguistic competence was assessed utilizing subtests of the Boston Diagnostic Aphasia test and the Revised Token test. Results indicate that central auditory involvement can occur without a concomitant decline in peripheral hearing sensitivity, cognitive function, or linguistic competence. Our findings also suggest, that for the type of individuals included in this study, the SSI-ICM appears to be the most sensitive measure to changes in central auditory processing abilities with advancing age.

Aged↗
PubMed1990

The separability of central auditory and cognitive deficits: implications for the elderly.

After viral encephalitis a 40-year-old man showed both central auditory deficit and severe cognitive deficits. The asymmetric central auditory deficit was revealed by speech audiometry. The effect could be explained neither by peripheral sensitivity loss nor by cognitive status. Results highlight the separability of central auditory and cognitive deficits. Implications for the elderly are discussed.

Adult↗
PubMed1989

Auditory perceptual problems in non-organic hearing disorder.

A series of 22 patients who presented with non-organic hearing disorder were examined for auditory perceptual problems. A test battery that examined eight areas of auditory perception revealed significant auditory perceptual problems in each of the 22 patients. The results indicate a view that differs from the traditional view of non-organic hearing disorder as either conscious feigning of a hearing disorder or an unconscious symptom of an unidentified emotional disorder. The information presented here indicates that specific auditory processing disorders could adversely affect patients' hearing and that auditory perceptual disorders could be diagnosed and treated.

Adolescent↗
PubMed1990

Long latency auditory event-related potentials from children with auditory processing disorders.

The purpose of this study was to evaluate auditory event-related potentials, and related long latency components, in children with auditory processing disorders, and to compare these results with a normal group matched for age, intelligence, and gender. Results showed a significant latency increase for the N1, P2, and P3 components in the processing disordered group. Furthermore, the interpeak latency interval P2-P3 was significantly longer in the clinical group. In terms of amplitude measures, only P3 amplitude differed significantly between groups. These results suggest that the long latency potentials may be useful in the assessment of children with processing disorders.

Auditory Perception↗
PubMed1992

Modified activity of the human auditory cortex during auditory hallucinations.

Previous reports have shown abnormalities in brain metabolism and evoked responses of schizophrenic patients with hallucinations. The authors recorded electric and magnetic auditory responses during transitory auditory hallucinations in two patients. Small but replicable response delays occurred during hallucinations. The results suggest that the effect of hallucinations on auditory cortex activity is similar to the effect of real sounds.

Acoustic Stimulation↗
PubMed1991

Human evoked potentials and the lateralization of a sound.

If an identical noise is presented to each ear with one ear receiving the noise slightly earlier than the other, the listener perceives the sound as originating from the side of the leading ear. If the interaural time-difference reverses, the subject perceives a shift in the lateralization of the sound to the other ear. This shift in lateralization evokes a late auditory potential with a negative wave at 135 ms and positive waves at 75 and 220 ms. This evoked potential specifically indexes central auditory processing since information about the timing of the auditory stimuli must be compared between the two ears. The response increases in amplitude with increasing interaural time-difference reaching maximum values between 0.3 and 1.5 ms. The response is evoked through acoustic frequencies below 2,000 Hz. In patients with multiple sclerosis the response is often abnormally delayed or small. The response may therefore be helpful in the clinical evaluation of patients with central auditory dysfunction.

Acoustic Stimulation↗
PubMed1989

Brainstem auditory evoked potentials in receptive developmental language disorder.

It has been hypothesized that receptive developmental language disorder (RDLD) may be explained by an auditory processing deficit. The neuroanatomical locus of this deficit is unknown. Brainstem auditory evoked potentials (BAEPs) reflect the functioning of the auditory nerve and auditory brainstem pathways to high-frequency acoustical stimulation in humans and reflect the first stages of auditory processing. These were studied in 12 subjects with RDLD (four females and eight males, ages 12 to 19) and twelve control subjects (three females and nine males, ages 14 to 24). Click intensity and rate of stimulation were varied. The BAEPs for the RDLD group were comparable to the control group as well as to hospital norms across intensity levels and stimulation rates. The evidence obtained suggests that a disorder in the neurophysiological systems underlying the BAEPs and reflecting initial stages of auditory processing is not essential for RDLD.

Adolescent↗
PubMed1990

Perceptual dysfunction in poor readers: evidence for visual and auditory segmentation problems in a sub-group of poor readers.

The purpose of this study was to consider reading disorders in children within the context of their general perceptual development. A review of the literature suggested that visual and auditory perceptual skills advance from a holistic to an analytical approach, and that reading skills also show this progression. It was proposed that poor readers might show impairments in visual and auditory segmentation tasks, if these skills are important factors in reading development. This hypothesis was tested on a sample (N = 20) of poor readers in the primary age range who were assessed against reading age and chronological age control groups. The hypothesis was partially borne out, a quarter of the sample performing very poorly on both types of tasks. It was argued that segmentation problems in perceptual tasks may underlie reading failure in some children, although the direction of the causation has yet to be determined.

Auditory Perceptual Disorders↗
PubMed1979

Effects of stimulus-onset asynchrony on the dichotic performance of children with auditory-processing disorders.

Dichotic stop-consonant-vowel identification was investigated in two experiments using two groups of learning-disabled children demonstrating clinical manifestations of auditory-processing disorders, and two groups of matched, control subjects. Two-item, forced-choice paradigms were used in both experiments. Overall (total) dichotic performance for the two learning-disabled groups was significantly lower than that of the control subjects in all dichotic conditions. This lower performance was attributable to the number of trials in which both stimulus items were correctly identified. Analysis of trials in which only one response was correct showed no differences between the groups in terms of magnitude or direction of ear-advantage (right). In conditions where stimulus onsets were separated by 30, 90, and 150 msec, analysis of one-correct trials demonstrated more accurate identification of the temporally lagging stimulus for all subjects. However, as the onset-time separation increased, the control group's identification of leading and lagging items approached equality. The learning-disabled group, on the other hand, showed little increase in identification of temporally leading items even when stimuli were separated by 150 msec. These data suggest learning-disabled children with auditory-processing disorders may have a reduced temporal efficiency in processing rapidly varying acoustic patterns associated with stop-consonants that is observable when speech perceptual mechanisms are stressed through dichotic competition.

Auditory Perceptual Disorders↗