相关实验视频

Updated: May 15, 2025

Optogenetic Activation of Afferent Pathways in Brain Slices and Modulation of Responses by Volatile Anesthetics

Optogenetic Activation of Afferent Pathways in Brain Slices and Modulation of Responses by Volatile Anesthetics

Published on: July 23, 2020

在不同时间尺度的propofol诱导无意识后,在thalamocortical和cortico-cortical系统中神经复杂性和连接性的变化

Zhenhu Liang¹, Luxin Fan¹, Bin Zhang¹

¹Key Laboratory of Intelligent Control and Neural Information Processing of the Ministry of Education of China, Yanshan University, Qinhuangdao 066004, Hebei, China; Key Laboratory of Intelligent Rehabilitation and Neuromodulation of Hebei Province, Yanshan University, Qinhuangdao 066004, China.

|April 9, 2025

概括

醇诱导的无意识会减少皮质复杂性,并改变大脑网络中的信息流. 这项研究揭示了麻醉期间被破坏的甲状腺皮质和皮质皮质连接.

科学领域:

神经科学是一个神经科学.
麻醉学麻醉学
计算神经科学是一种神经科学.

背景情况:

神经活动在多个时间和空间尺度上运行.
了解麻醉对大脑网络连接的影响对于麻醉的安全性和理论至关重要.
普罗波对甲状腺皮层和皮质皮层系统的复杂性和跨尺度的连接性的影响尚不清楚.

研究的目的:

调查在醇诱导失意识期间,在甲状腺皮层和皮质皮层系统内的复杂性,功能连接性和定向连接性的变化.
通过各种时间尺度 (τ=4 ms到32 ms) 检查这些变化.
阐明普罗波对大脑网络的规模和区域特异性影响.

主要方法:

对立体脑电图 (SEEG) 数据从清醒到失去意识的分析.
计算复杂性 (变 - PE),功能连接性 (变相互信息 - PMI) 和方向连接性 (象征条件相互信息 - SCMI,方向性指数 - DI).
评估大脑区域,包括前额叶皮质,叶和thalamus的前核.

主要成果:

在大多数区域和尺度上,propofol麻醉显著降低了皮质复杂性 (PE) (p < 0.001).
区域间功能连接 (PMI) 一般增加或保持稳定.
定向连接 (DI) 转向前额皮层和丘脑,驱动叶在后期失去意识.

结论:

醇诱导的无意识的特征是皮质复杂性降低,功能和方向连接性改变.
甲状腺皮质和皮质皮质系统在普罗波麻醉期间表现出信息整合中断.
这些发现增强了对麻醉机制和大脑网络动态的理论理解.

关键词:

复杂性复杂性的多层次的多层次的普罗波福尔 (Propofol) 是一种立体电脑脑摄影 (Stereo-electroencephalography) 是一种立体电脑摄影技术.甲状腺皮层系统甲状腺皮层系统失去意识失去意识

更多相关视频

Recording Brain Electromagnetic Activity During the Administration of the Gaseous Anesthetic Agents Xenon and Nitrous Oxide in Healthy Volunteers

Recording Brain Electromagnetic Activity During the Administration of the Gaseous Anesthetic Agents Xenon and Nitrous Oxide in Healthy Volunteers

Published on: January 13, 2018

Real-Time fMRI Brain Mapping in Animals

Real-Time fMRI Brain Mapping in Animals

Published on: September 24, 2020

相关概念视频

Subconsciousness and No Awareness

Subconsciousness and No Awareness

The concept of subconscious awareness refers to the processing of information below the level of conscious thought, which significantly influences both behaviors and decisions. It is also known as waking subconscious awareness. This complex level of cognition operates without the direct awareness of the individual, facilitating rapid and simultaneous handling of multiple information streams.
An illustrative example of subconscious processing is its role in problem-solving. Often, individuals...

Understanding Consciousness

Understanding Consciousness

Consciousness can be defined as the state of being aware of and able to think about one's existence, sensations, and surroundings. It encompasses two major components: awareness and arousal. Awareness pertains to the recognition of environmental stimuli and internal states. At the same time, arousal refers to the physiological readiness to engage with these stimuli, which varies significantly between states like sleep and wakefulness.
Sleep, a crucial state, is characterized by reduced...

Stages of General Anesthesia

Stages of General Anesthesia

Various sedation levels offer significant advantages in facilitating procedural interventions for patients undergoing medical or invasive surgical procedures. These levels span from anxiolysis to general anesthesia, providing a spectrum of sedative effects to cater to specific patient needs. Anxiolysis reduces anxiety and is achieved through minimal sedation, enabling patients to remain awake and responsive while feeling more at ease during the procedure. This level can benefit minor...