Journal of Rehabilitation Research & Development (JRRD)

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Volume 53 Number 5, 2016
   Pages 705 — 720

Abstract — Chronic effects of exposure to high-intensity blasts: Results of tests of central auditory processing

Frederick J. Gallun, PhD;1–2* M. Samantha Lewis, PhD;1–2 Robert L. Folmer, PhD;1–2 Michele Hutter, MS;1 Melissa A. Papesh, PhD;1 Heather Belding, BS;1 Marjorie R. Leek, PhD1–3

1National Center for Rehabilitative Auditory Research, Rehabilitation Research & Development Service, Department of Veterans Affairs (VA) Portland Health Care System, Portland, OR; 2Department of Otolaryngology/Head & Neck Surgery, Oregon Health & Science University, Portland, OR; 3VA Loma Linda Healthcare System and Department of Otolaryngology/Head & Neck Surgery, Loma Linda University Healthcare, Loma Linda, CA

Abstract — Patients who have recently experienced high-??intensity blasts are more likely to perform abnormally on tests developed to be sensitive to deficits of central auditory processing than were age- and hearing-matched individuals without blast exposures. Here, a group of 59 participants was recruited, 30 of whom were exposed to high-intensity blasts between 4 and 11 yr prior to testing and did not participate in the previous study, along with 29 controls similar in age and hearing thresholds to the blast group. All were tested on a set of behavioral tests that were used in the previous study. Abnormal performance was measured with reference both to published normative data and to the average performance of the control group. Members of the blast-exposed group were again found to be significantly more likely to perform in the abnormal range than were the members of the control group. Because the patients in this study were tested a minimum of 4 yr after blast exposure, these results suggest that for some of those exposed, problems processing auditory information may be a chronic effect of blast exposure even in the absence of significant peripheral hearing loss.

Key words: auditory dysfunction, auditory processing disorder, blast, central auditory processing, dichotic listening, hearing loss, psychoacoustics, rehabilitation, temporal processing, traumatic brain injury, Veterans.


View HTML ¦ View PDF ¦ Contents Vol. 53, No. 6
This article and any supplementary material should be cited as follows:
Gallun FJ, Lewis MS, Folmer RL, Hutter M, Papesh MA, Belding H, Leek MR. Chronic effects of exposure to high-intensity blasts: Results of tests of central auditory processing. J Rehabil Res Dev. 2016;53(6):705–20.
http://dx.doi.org/10.1682/JRRD.2014.12.0313
ORCID: Frederick J. Gallun, PhD: 0000-0002-4145-2199; Melissa A. Papesh, PhD: 0000-0003-0853-3824
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