Department of Kinesiology, Université de Montréal, Montreal, Canada.
School of Speech Pathology and Audiology, Université de Montréal, Montreal, Canada.
Sci Rep. 2018 Jul 2;8(1):9921. doi: 10.1038/s41598-018-28312-1.
Sensitivity to sounds is one frequent symptom of a sport-related concussion, but its assessment rarely goes beyond a single question. Here we examined sensitivity to sounds using psychoacoustic and psychometric outcomes in athletes beyond the acute phase of injury. Fifty-eight college athletes with normal hearing who either had incurred one or more sport-related concussions (N = 28) or who had never suffered head injury (N = 30) participated. Results indicated that the Concussed group scored higher on the Hyperacusis questionnaire and displayed greater sensitivity to sounds in psychoacoustic tasks compared to the Control group. However, further analyses that separated the Concussed group in subgroups with Sound sensitivity symptom (N = 14) and Without sound sensitivity symptom (N = 14) revealed that athletes with the sound complaint were the ones responsible for the effect: Concussed athletes with self-reported sound sensitivity had lower Loudness Discomfort Thresholds (LDLs), higher Depression and Hyperacusis scores, and shifted loudness growth functions compared to the other subgroup. A simple mediation model disclosed that LDLs exert their influence both directly on Hyperacusis scores as well as indirectly via depressive symptoms. We thus report a new clinical presentation of hyperacusis and discuss possible mechanisms by which it could arise from concussion.
对声音敏感是与运动相关的脑震荡的常见症状之一，但对其评估很少超出单一问题。在这里，我们在运动员受伤的急性期之外，使用心理声学和心理计量学结果来检查对声音的敏感性。58 名听力正常的大学生运动员参加了这项研究，他们要么遭受过一次或多次与运动相关的脑震荡（N=28），要么从未遭受过头部受伤（N=30）。结果表明，与对照组相比，脑震荡组在 Hyperacusis 问卷上的得分更高，在心理声学任务中对声音的敏感性也更高。然而，进一步的分析将脑震荡组分为有声音敏感症状（N=14）和无声音敏感症状（N=14）的亚组后发现，有声音抱怨的运动员是造成这种影响的原因：有自我报告的声音敏感的脑震荡运动员的响度不适阈（LDLs）较低，抑郁和 Hyperacusis 评分较高，响度增长功能发生变化，与其他亚组相比。一个简单的中介模型揭示了 LDLs 不仅直接影响 Hyperacusis 评分，而且还通过抑郁症状间接影响评分。因此，我们报告了一种新的听力过敏临床表现，并讨论了它可能因脑震荡而产生的可能机制。
