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RISS 인기검색어
- 검색키워드
- 저자 : Fatima T. Husain (검색결과 3 건)
- 무료
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Neural Mechanisms and Models of Tinnitus Generation
한우재,Fatima T. Husain 한국청각언어재활학회 2009 Audiology and Speech Research Vol.5 No.1
Tinnitus is an auditory phantom sensation - it is the false perception of sound in the absence of an external source. Tinnitus can be managed, but there is no cure. Tinnitus affects approximately 10-20% of the population and is often accompanied by hearing loss. The hearing loss causes reorganization of the central auditory processing pathways and associated areas in the brain, possibly leading to tinnitus. However, the underlying neural mechanisms are poorly understood. This paper reviews possible regions exhibiting activity related to tinnitus, from the cochlea to the primary auditory cortex, and the mechanisms that may underlie tinnitus generation. However, tinnitus is complex phenomenon and no single mechanism or brain region can account for all tinnitus sub-types or symptoms. In addition, somatosensory system and limbic system, with their strong connections to the central auditory processing pathways may be involved in tinnitus generation and persistence. Although, there have been advances in understanding neural mechanisms of tinnitus, particularly due to brain imaging studies in humans, there is still a paucity of data linking objective measure of tinnitus, obtained using brain imaging techniques, to subjective behavioral measures.
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The Role of Cognitive Control in Tinnitus and Its Relation to Speech-in-Noise Performance
Yihsin Tai,Fatima T. Husain 대한청각학회 2019 Journal of Audiology & Otology Vol.23 No.1
Self-reported difficulties in speech-in-noise (SiN) recognition are common among tinnitus patients. Whereas hearing impairment that usually co-occurs with tinnitus can explain such difficulties,recent studies suggest that tinnitus patients with normal hearing sensitivity still showdecreased SiN understanding, indicating that SiN difficulties cannot be solely attributed tochanges in hearing sensitivity. In fact, cognitive control, which refers to a variety of top-downprocesses that human beings use to complete their daily tasks, has been shown to be criticalfor SiN recognition, as well as the key to understand cognitive inefficiencies caused by tinnitus. In this article, we review studies investigating the association between tinnitus and cognitivecontrol using behavioral and brain imaging assessments, as well as those examining theeffect of tinnitus on SiN recognition. In addition, three factors that can affect cognitive controlin tinnitus patients, including hearing sensitivity, age, and severity of tinnitus, are discussedto elucidate the association among tinnitus, cognitive control, and SiN recognition. Although a possible central or cognitive involvement has always been postulated in the observedSiN impairments in tinnitus patients, there is as yet no direct evidence to underpin thisassumption, as few studies have addressed both SiN performance and cognitive control inone tinnitus cohort. Future studies should aim at incorporating SiN tests with various subjectiveand objective methods that evaluate cognitive performance to better understand therelationship between SiN difficulties and cognitive control in tinnitus patients.
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