Myelination of the Corpus Callosum and Auditory Processing Problems in Children: Theoretical and Clinical Correlates

Musiek, Frank E.; Gollegly, Karen M.; Baran, Jane A.

doi:10.1055/s-0028-1095748

Cited by 75 publications

(60 citation statements)

References 11 publications

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“…corpus callosum) are often affected by delayed neuromaturation. Therefore, these areas are often found to be deficient in cases of CAPD (Musiek et al, 1984;Bellis & Wilber, 2001, Musiek & Weihing, 2011.…”

Section: Resultsmentioning

confidence: 99%

Evolving concepts of developmental auditory processing disorder (APD): A British Society of Audiology APD Special Interest Group ‘white paper’

Moore

Rosen²,

Bamiou

et al. 2012

International Journal of Audiology

119

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Children with listening difficulties, but normal audiometry, may be diagnosed with APD. The diagnosis is typically based on poor performance on tests of perception of both non-speech and speech stimuli. However, non-speech test results correlate only weakly with evaluations of speech-in-noise processing, cognitive skills, and caregiver evaluations of listening ability. The interpretation of speech test results is confounded by the involvement of language processing mechanisms. Overall, listening ability is associated more with higher-level, cognitive and analytic processing than with lower-level sensory processing. Current diagnosis of a child with APD, rather than another problem (e.g. language impairment, LI), is determined more by the referral route than by the symptoms. Co-occurrence with other learning problems suggests that APD may be a symptom of a more varied neurodevelopmental disorder. Alternately, APD has been proposed as a cause of language-based disorders, but there is no one-to-one mapping between listening and language among individuals. Screening for APD may be most appropriately based on a well-validated, caregiver questionnaire that captures the fundamental problem of listening difficulties and identifies areas for further assessment and management. This approach has proved successful for LI, and may in future serve as a metric to help assess other, objective testing methods.

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Section: Resultsmentioning

confidence: 99%

Evolving concepts of developmental auditory processing disorder (APD): A British Society of Audiology APD Special Interest Group ‘white paper’

Moore

Rosen²,

Bamiou

et al. 2012

International Journal of Audiology

119

View full text Add to dashboard Cite

show abstract

“…The important role of the corpus callosum in mediating verbal responses to left-ear input has been extensively studied (Kaga, Shindo, Gotoh, & Tamura, 1990;Lindeboom & Horst, 1988;Milner, Taylor, & Sperry, 1968;Rao et al 1989; Sparks & Geschwind, 1968). That there is age-related change in the human corpus callosum is also well documented (Allen, Richey, Chai, & Gorski, 1991;Byne, Bleier, & Houston, 1988;Doraiswamy et al, 1991;Laissy et al, 1993;Weis, Jellinger, & Wenger, 1991;Witelson, 1989;Yoshii & Duara, 1989).…”

Section: Discussionmentioning

confidence: 99%

“…To determine the peak latencies of the ERP responses (i.e., the latencies at which to construct topographic brain maps), grand-averaged global field power waveforms (Skrandies, 1989(Skrandies, , 1990 were computed. Global field power (GFP) is a method for examining the extent to which the electrical activity across the surface of the scalp is nonuniform, and the latency at which maximal nonuniformity occurs; that is, the degree of relief or "hilliness" of the electrical surface, and the time or times at which such relief is maximal.…”

mentioning

confidence: 99%

Dichotic Listening, Event-Related Potentials, and Interhemispheric Transfer in the Elderly

Jerger¹,

Alford²,

Lew³

et al. 1995

Ear and Hearing

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Objective: To determine the basis for the large, age-related asymmetries in dichotic listening performance scores reported by Jerger et al. (1994).Design: Behavioral and electrophysiologic responses to dichotic listening tasks in both verbal and nonverbal paradigms were obtained in four groups of subjects: young adults with normal hearing, elderly persons with presbyacusis, elderly persons with presbyacusis and marked dichotic deficits, and patients with lesions of the corpus callosum.Results: In comparison with the young group the two elderly groups showed an increasing left-ear deficit on the verbal task, and an increasing rightear deficit on the nonverbal paradigm. The pattern of results obtained in the elderly persons with marked dichotic deficits was similar to the pattern of results in the group with callosal lesions. Conclusions: With age, there may be a significant loss of efficiency of interhemispheric transfer of auditory information through the corpus callosum. Such age-related deficit might have important implications for the effective use of binaural information by elderly persons. (Ear & Hearing 1995;16;482-498)Whenever a verbal task is presented in the dichotic mode, there is a slight performance advantage for the right ear input over the left ear input. For a recent summary of the extensive evidence for the right ear-advantage (REA) for verbal stimuli, see Hugdahl (1988) and Hellige (1993). A commonly accepted explanation for the REA derives from two principles: first, the left hemisphere is specialized for the processing of verbal materials; second, the right ear enjoys privileged access to the left hemisphere. In effect the right ear is directly connected to the left hemisphere via the crossed afferent auditory pathway, while the left ear, connected directly to the right hemisphere, has access to the left hemisphere only via the interhemispheric connecting pathways in the corpus callosum (Zaidel, 1983).The extent to which aging affects dichotic listening ability and the REA has been controversial.Early studies, utilizing primarily the Staggered Spondee Word (SSW) test, the masking-level difference (MLD) test, or Consonant-Vowel (CV) syllables were well summarized by Willott (1991). " . . . while age-related declines in binaural processing may occur, they are not especially pronounced in many cases'' (p. 234). "Although substantial age-related declines were frequently observed, the effects were attenuated when progression in degree of peripheral hearing loss was taken into account" (4, p. 232).More recently, however, newer dichotic paradigms have suggested more robust age effects. In a task involving the identification of dichotically presented sentences, for example, Jerger, Chmiel, Allen, and Wilson (1994) showed a substantial agerelated performance decline, in both free-report and directed-report modes, which could not be explained by degree of peripheral hearing sensitivity loss. Similar aging effects on dichotic listening have been noted by Barr and Giambra (1990), using a word shadowing tec...

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“…Such a profile may be extrapolated when seen in individuals without known lesions. It has been reported that some learning disabled children have profiles strikingly similar to split-brain subjects on the tests mentioned above (Musiek, Gollegly & Baran, 1984). This, as well as electrophysiologic studies on children and animals, implicates a maturational factor related to the amount of myelin in the corpus callosum.…”

Section: Discussionmentioning

confidence: 84%

Profiles of Types of Central Auditory Processing Disorders in Children With Learning Disabilities

Musiek

Gollegly

Ross

1985

Journal of Childhool Communication Disorders

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This article will profile five interesting cases of children with learning disabilities and auditory processing problems. These children have met a rather stringent criteria in terms of being classified as learning disabled. All subjects had normal peripheral hearning and speech discrimination ability in quiet bilaterally, with the exeption of Case 2. Each received extensive educational, psychological, and speech and language evaluations in addition to our audiological work-up. However, we will focus only on the audiological evaluations. Following each case, we will discuss the possible correlations between the presumed etiology and the unique audiological pattern on the central test battery. These five cases represent various kinds of central auditory profiles, with associated etiological correlates, which provide a categorization system for these children.

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Myelination of the Corpus Callosum and Auditory Processing Problems in Children: Theoretical and Clinical Correlates

Cited by 75 publications

References 11 publications

Evolving concepts of developmental auditory processing disorder (APD): A British Society of Audiology APD Special Interest Group ‘white paper’

Evolving concepts of developmental auditory processing disorder (APD): A British Society of Audiology APD Special Interest Group ‘white paper’

Dichotic Listening, Event-Related Potentials, and Interhemispheric Transfer in the Elderly

Profiles of Types of Central Auditory Processing Disorders in Children With Learning Disabilities

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