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在正常听力婴儿中,通过听觉脑干响应与NB CE-Chirp LS刺激进行听力图估计
Diego da Silva Ormundo1, Mariana Lopes Fávero2, Doris Ruthy Lewis3
1Human Communication and Health Graduate Program, Faculty of Humanities and Health Sciences, Pontifícia Universidade Católica de São Paulo, Universidade de São Paulo, São Paulo, SP, Brazil.
International archives of otorhinolaryngology
|April 15, 2024
概括
NB CE-Chirp LS刺激有效估计正常听力婴儿的听觉脑干反应 (ABR) 值,在频率上显示可靠的结果. 这种听力学评估工具提供了一致的振幅和延迟,增强了检查员的信心.
科学领域:
- 听力学 听力学是指听力学.
- 神经科学是一个神经科学.
- 儿科医学 儿科医学
背景情况:
- 开发的NB CE-Chirp LS刺激是为了提高婴儿和难以测试的儿童的听觉脑干响应 (ABR) 值估计.
- 在评估它在各种听力损失类型中的有效性之前,了解正常听力婴儿的刺激行为至关重要.
研究的目的:
- 在正常听觉的婴儿中,使用NB CE-Chirp LS刺激在500,1,000,2,000和4,000 Hz时来描述ABR值.
- 描述与此刺激获得的ABR值的幅度和绝对延迟.
主要方法:
- 使用Eclipse EP25系统测量了听觉脑干响应值.
- 通过ER-3A插入式耳机提供了NB CE-Chirp LS刺激.
- 脑电图过包括30Hz高通和1500Hz低通过器;ABR值被定义为引起V波的最低强度,在5dB以下没有响应.
主要成果:
- 评估了18名听力正常的婴儿.
- 平均ABR值 (dBnHL) 在500Hz时为23.8 (±4.2),在1000Hz时为14.4 (±5.7),在2000Hz时为6.0 (±5.0) 和在4000Hz时为7.0 (±5.9).
- 平均绝对延迟 (ms) 范围从8.86 (±1.12) 到9.64 (±0.52),平均幅度 (nV) 范围从0.105 (±0.028) 到0.141 (±0.052) 跨频率.
结论:
- 在NB CE-Chirp LS刺激达到低的听觉脑干响应值,特别是在更高的频率.
- 这种刺激产生了跨频率和强大的振幅一致的绝对延迟.
- 这些发现增加了审查员对NB CE-Chirp LS刺激获得的ABR值结果的信心.
相关概念视频
01:31Hearing
When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
01:13The Cochlea
The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
01:21Perceiving Loudness, Pitch, and Location
The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by identifying...
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by identifying...