Department of Clinical and Biological Psychology, University of Ulm, Ulm, Germany.
PLoS One. 2011;6(11):e27379. doi: 10.1371/journal.pone.0027379. Epub 2011 Nov 18.
Tinnitus is the perception of a sound in the absence of any physical source of it. About 5-15% of the population report hearing such a tinnitus and about 1-2% suffer from their tinnitus leading to anxiety, sleep disorders or depression. It is currently not completely understood why some people feel distressed by their tinnitus, while others don't. Several studies indicate that the amount of tinnitus distress is associated with many factors including comorbid anxiety, comorbid depression, personality, the psychosocial situation, the amount of the related hearing loss and the loudness of the tinnitus. Furthermore, theoretical considerations suggest an impact of the age at tinnitus onset influencing tinnitus distress.
Based on a sample of 755 normal hearing tinnitus patients we tested this assumption. All participants answered a questionnaire on the amount of tinnitus distress together with a large variety of clinical and demographic data.
Patients with an earlier onset of tinnitus suffer significantly less than patients with an onset later in life. Furthermore, patients with a later onset of tinnitus describe their course of tinnitus distress as more abrupt and distressing right from the beginning.
We argue that a decline of compensatory brain plasticity in older age accounts for this age-dependent tinnitus decompensation.
耳鸣是指在没有任何物理声源的情况下感知到声音。大约有 5-15%的人口报告听到过这样的耳鸣,大约 1-2%的人患有耳鸣,导致焦虑、睡眠障碍或抑郁。目前还不完全清楚为什么有些人会因耳鸣而感到痛苦,而有些人则不会。一些研究表明,耳鸣困扰的程度与许多因素有关,包括共患焦虑、共患抑郁、个性、社会心理状况、相关听力损失的程度和耳鸣的响度。此外,理论考虑表明,耳鸣发作的年龄会影响耳鸣困扰的程度。
基于 755 名正常听力耳鸣患者的样本,我们检验了这一假设。所有参与者都回答了一份关于耳鸣困扰程度的问卷,同时还提供了大量的临床和人口统计学数据。
耳鸣发作较早的患者比晚年发病的患者明显受影响小。此外,耳鸣发作较晚的患者从一开始就描述说他们的耳鸣困扰程度更突然、更痛苦。
我们认为,老年时补偿性大脑可塑性的下降导致了这种与年龄相关的耳鸣恶化。