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Events and Research in Speech, Language, and Hearing Disorders

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    Program to Help Families Facing Autism Challenge

    Reaching out to families touched by autism, the UT Dallas Callier Center for Communication Disorders is offering a pilot program to help parents facing a child's new diagnosis.

    Strategy Training and Response to Therapy (START) focuses on children 18 months to 5 years old who have been recently diagnosed with an autism spectrum disorder and who have received an autism assessment through Children’s Medical Center of Dallas..

    Read the rest of the story at the UTD News Center

    A Cure For Tinnitus at UTD?

    A promising new therapy has made its way from Australia to the States. The Callier Center for Communication Disorders at University of Texas at Dallas is one of about 200 medical centers offering Neuromonics, a treatment device for tinnitus developed by an Australian audiologist, Dr. Paul Davis.

    Dallas audiologist Anne Howell, head of Callier's tinnitus clinic, says the treatment works by retraining neural pathways in the brain. As a result, the auditory system is desensitized to the sound.

    Read the rest of the story at The Dallas Observer

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« Congenital aural atresia: Transmastoid approach; an old technique with good results
Genetic and pharmacological intervention for treatment/prevention of hearing loss »

Asymmetry of voice onset time-processing in adult developmental dyslexics

Posted by Callier Library on May 7, 2008

from Clinical Neurophysiology

Methods
Auditory-evoked potentials (AEPs) to voiced (/ba/) and voiceless (/pa/) speech stimuli were recorded from 10 DD-history+ adults and 8 controls. Source modelling of the “release component” (RC: 240 ms; time-locked to voiced consonantal release and considered reflective of VOT-processing) was conducted to explore VOT asymmetries.

Results
Controls demonstrated L > R RC source probe amplitude asymmetry in the auditory cortex. DD-history+ subjects with little persistent reading deficit (n = 5) demonstrated normal temporal coding but rightward asymmetry. DD-history+ subjects with severe persistent deficits (n = 5) exhibited numerous supplemental AEP components (notably left hemispheric) and inconsistent asymmetry (leftward or alternating).

Conclusions
These preliminary findings suggest that DD-history+ adults process auditory speech cues differently than adults without previous DD. The nature of this processing may relate to the severity of persistent reading deficits.

Significance
Previous dyslexics with little persistent deficit can exhibit atypical functional asymmetry with normal auditory temporal coding. Source modelling represents an effective, non-invasive means of exploring processing asymmetries in clinical populations.

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« Congenital aural atresia: Transmastoid approach; an old technique with good results
Genetic and pharmacological intervention for treatment/prevention of hearing loss »