在耳中的听觉皮层的焦点超直流刺激的感知和认知影响
1Department of Radiology, Northwestern University, Chicago, IL, USA.
概括
对于耳而言,超直流刺激 (tDCS) 并没有使听力或认知恶化. 然而,它可能会改善噪音中的听力,并干扰运动学习,这表明简短的认知测试可以监测大脑刺激效应.
科学领域:
- 神经科学是一个神经科学.
- 听觉神经科学 听觉神经科学
- 认知神经科学 认知神经科学
背景情况:
- 跨直流刺激 (tDCS) 正在探索各种大脑疾病.
- 由于大脑的复杂性,评估tDCS的感知和认知副作用至关重要.
- 之前对tDCS治疗慢性耳的研究是有限的.
研究的目的:
- 评估基于平板电脑的简短任务的可行性,以评估tDCS的听觉和认知副作用.
- 确认针对听觉皮层的多会话tDCS协议是否会使 tinnitus 患者的听力恶化.
- 调查tDCS对听力和认知的潜在不良影响.
主要方法:
- 患有慢性耳的参与者接受了听觉 (纯色度值,Words In Noise) 和认知 (Flanker,维度变化卡片类) 任务.
- 参与者接受了主动或假的tDCS,目标是左侧听觉皮层.
- 在第一个和第五个tDCS会议之前和之后,任务被管理.
主要成果:
- 听力任务的执行与临床听力测量高度相关,验证了任务.
- 在主动或虚假tDCS后,没有观察到整体听力表现的显著变化.
- 经过五次活跃的tDCS会话后,在噪音中检测声音 (Words In Noise) 中出现了适度的改善.
- 认知任务反应时间在假装组的实践中得到改善,但不是活跃组,这表明tDCS干扰学习.
结论:
- 听力皮层的多会话tDCS似乎对 tinnitus 患者的听力和认知安全.
- tDCS可能为噪音环境中的听力提供适度的好处.
- tDCS可能会阻碍某些认知任务的学习相关改进.
- 简短的认知和感知测试电池是监测大脑刺激效果和识别新治疗点的有效工具.
更多相关视频
相关概念视频
Hearing
48.0K
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.
48.0K
Hair Cells
36.1K
Hair cells are the sensory receptors of the auditory system—they transduce mechanical sound waves into electrical energy that the nervous system can understand. Hair cells are located in the organ of Corti within the cochlea of the inner ear, between the basilar and tectorial membranes. The actual sensory receptors are called inner hair cells. The outer hair cells serve other functions, such as sound amplification in the cochlea, and are not discussed in detail here.
36.1K
The Cochlea
41.0K
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.
41.0K
Sensory Functions of the Skin
9.1K
The skin is the largest organ of the human body and plays a crucial role in our sensory perception. It contains a vast network of sensory receptors that contribute to the skin's protective function by perceiving physical, biological, and environmental cues and generating relevant responses.
There are two main categories of receptors on the skin: capsulated and non-capsulated. The non-capsulated ones are mainly the pain receptors. The capsulated ones can be further categorized based on the...
There are two main categories of receptors on the skin: capsulated and non-capsulated. The non-capsulated ones are mainly the pain receptors. The capsulated ones can be further categorized based on the...
9.1K
Auditory Pathway
7.1K
Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking...
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking...
7.1K
Perceiving Loudness, Pitch, and Location
1.3K
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...
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...
1.3K


