相关实验视频
Updated: Jun 23, 2025

05:07
Using Looming Visual Stimuli to Evaluate Mouse Vision
Published on: June 13, 2019
11.3K
对迫在眉的源头的皮层反应是由听觉外围解释的
Sarah Benghanem1, Rudradeep Guha2, Estelle Pruvost-Robieux3
1INSERM UMR 1266, IPNP (Institut de Psychiatrie et Neurosciences de Paris), Paris, France; Medical ICU, Cochin Hospital, AP-HP, Paris, France; University Paris Cité, Medical School, Paris, France.
概括
似乎接近听者的声音 (临) 吸引了更多的注意力,而不是退缩的声音. 我们的研究表明,这种差异主要是由于外周听力处理,而不是更高水平的大脑活动.
科学领域:
- 听觉神经科学 听觉神经科学
- 精神声学是一种精神声学.
- 计算式听觉神经科学 计算式听觉神经科学
背景情况:
- 行为研究表明,声音的强度增加 (潜伏) 获得更多的注意力和生理资源,而不是退缩的声音.
- 这种对迫在眉的声音的认知放大作用的潜在神经生理机制仍然不清楚.
- 现有的研究往往将这些差异归因于更高层次的认知过程.
研究的目的:
- 为了研究神经生理学基础的差异化处理迫在眉的与收回的听觉刺激.
- 确定外周听力系统的非线性是否解释了观察到的皮质差异.
- 区分外围和中央 (皮质) 对听觉事件相关潜能 (ERP) 的贡献.
主要方法:
- 采集的脑电图 (EEG) 数据使用一个奇怪的范式与临,退缩,和平面 (恒定水平) 偏离的听觉刺激.
- 开发了一个听觉外围的计算模型来模拟外围处理.
- 利用生成性EEG方法 (时间响应函数,TRF) 来建模ERP并预测外围非线性对皮质响应的影响.
主要成果:
- 听觉外围的计算模型成功地解释了皮质对平面偏差反应的显著部分变异 (45%的迫在眉,33%的退缩).
- 该模型表明,外围非线性编码在很大程度上解释了在迫在眉和退缩声音之间的皮质反应中观察到的差异.
- 皮层对动态 (迫在眉,退缩) 和静态 (平坦) 水平偏差的反应似乎源于相同的底层皮层机制.
结论:
- 与回退的声音相比,迫在眉的声音的增强处理主要是外周听力系统非线性的一种工件,而不仅仅是上下认知控制.
- 早期的,前传的外围机制有效地处理声音强度的变化,减少后续神经网络的负担.
- 这些发现挑战了所有观察到的听觉处理中的皮质差异必然涉及高层决策变量的观念.
相关概念视频
Auditory Pathway
5.4K
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...
5.4K
Hearing
52.0K
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.
52.0K
Perceiving Loudness, Pitch, and Location
205
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...
205
Motor and Sensory Areas of the Cortex
3.7K
The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex....
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex....
3.7K
Perception of Sound Waves
4.4K
The human ear is not equally sensitive to all frequencies in the audible range. It may perceive sound waves with the same pressure but different frequencies as having different loudness. Moreover, the perception of sound waves depends on the health of an individual's ears, which decays with age. The health of one's ears may also be affected by regular exposure to loud noises.
The pitch of a sound depends on the frequency and the pressure amplitude of the source. Two sounds of the same...
The pitch of a sound depends on the frequency and the pressure amplitude of the source. Two sounds of the same...
4.4K
The Cochlea
44.7K
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.
44.7K

