周围的阿尔法频率通过调节身体信号的时间整合来塑造自己的身体感知
Mariano D'Angelo1, Renzo C Lanfranco2,3, Marie Chancel4
1Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden. mariano.dangelo@ki.se.
Nature communications
|January 12, 2026
概括
头皮皮层中的阿尔法大脑波会影响我们随着时间的推移如何整合感官信息,影响我们对身体所有权的感觉. 更快的阿尔法频率缩小了时间结合窗口,增强了对身体所有权的感知.
科学领域:
- 认知神经科学 认知神经科学
- 关于自我感知的神经科学
- 感官整合 感官整合
背景情况:
- 建议使用α频的大脑振荡来调节外部感官信号的时间采样,定义时间结合窗口 (TBW).
- 阿尔法频率在整合自我相关的感官信号和身体所有权感知方面的作用仍然未被探索.
研究的目的:
- 调查个体α频率 (IAF) 是否影响自我相关感官信号的时间结合窗口 (TBW).
- 确定IAF对身体所有权感知和视觉触觉同时性判断的影响.
- 为了确定头顶阿尔法振荡和身体所有权之间的因果关系.
主要方法:
- 从头皮皮层测量个体α频率 (IAF).
- 在身体所有权和视觉触觉同时性任务中评估了TBW和感知敏感性.
- 利用大脑刺激来调节IAF,并观察对TBW和敏感性的影响.
- 采用计算建模来理解将IAF与时间集成联系在一起的机制.
主要成果:
- 国际空军预测TBWs和身体所有权和同时性任务的感知敏感性.
- 更快的IAF与更窄的TBW和更高的灵敏度相关;更慢的IAF显示了相反的效果.
- 确立了因果关系:大脑刺激改变了IAF调节的TBW和灵敏度.
- 计算模型表明IAF在因果推理过程中影响异步处理中的不确定性.
结论:
- 周围的阿尔法频率在塑造人体所有权感知方面发挥着至关重要的作用.
- 阿尔法振荡调节身体感官信号的时间整合,影响自我意识.
- 这些发现为大脑活动的时间动态如何与自我感知有关提供了一个神经机制.
相关概念视频
01:21Perceiving Loudness, Pitch, and Location
925
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...
925
01:17Auditory Perception
1.0K
The auditory system is essential for sound perception, utilizing various critical structures. When sound waves enter the outer ear, they travel through the ear canal and cause the eardrum to vibrate. These vibrations are then transmitted to the middle ear, where three tiny bones – the malleus, incus, and stapes – amplify the sound. This amplification is crucial, as it ensures that the sound vibrations are strong enough to be conveyed to the inner ear. These vibrations then reach the...
1.0K
01:01Perception of Sound Waves
5.4K
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...
5.4K
01:13The Cochlea
50.5K
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.
50.5K
01:15Equilibrium and Balance
6.2K
The inner ear assumes dual functionalities of auditory perception and equilibrium maintenance. The vestibule is the organ responsible for balance. This organ contains mechanoreceptors, specifically hair cells, endowed with stereocilia, which aid in deciphering information regarding the position and motion of our heads. Two intrinsic components, the utricle and saccule, help perceive head position, while the semicircular canals track head movement. Neurological messages initiated in the...
6.2K
01:31Hearing
56.4K
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.
56.4K