Contralateral Acoustic-Reflex Growth Function in a Patient with a Cerebellar Tumor A Case Study Research Article
Research Article  |   November 01, 1989
Contralateral Acoustic-Reflex Growth Function in a Patient with a Cerebellar Tumor
 
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Article Information
Research Article   |   November 01, 1989
Contralateral Acoustic-Reflex Growth Function in a Patient with a Cerebellar Tumor
Journal of Speech and Hearing Disorders, November 1989, Vol. 54, 505-509. doi:10.1044/jshd.5404.505
History: Received March 3, 1988 , Accepted October 13, 1988
 
Journal of Speech and Hearing Disorders, November 1989, Vol. 54, 505-509. doi:10.1044/jshd.5404.505
History: Received March 3, 1988; Accepted October 13, 1988

The contralateral acoustic-reflex growth functions (ARGFs) for 500-Hz and 1000-Hz tonal activators were obtained pre- and postsurgery in a patient with a right cerebellar tumor. The acoustic-reflex magnitude was quantified as the change in equivalent air volume at the tympanic membrane during acoustic-reflex contraction. The presurgical ARGFs were shallow in the right ear and steep in the left ear at both activator frequencies. The postsurgical ARGFs were steep, bilaterally, reflecting a return to normal in the right ear. The implications with respect to the use of the ARGF measure in differential diagnosis are discussed.

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