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Brain Stimulation Modulates Thinking
  • 글쓴이 : Communication Team
  • 조회 : 211
  • 일 자 : 2024-06-03


Brain Stimulation Modulates Thinking
Professor Min Byoung-kyong’ Group published its results in NeuroImage

 

 

대학원 뇌공학과 민병경 교수

▲ Professor Min Byoung-kyong of the Department of Brain & Cognitive Engineering at the Graduate School.

 

 

Professor Min Byoung-kyong of the Department of Brain & Cognitive Engineering at the Graduate School intentionally modulated color representation through non-invasive electrical brain stimulation and investigated the changes in the activity of the brain regions responsible for the corresponding functions.

The results were published online in NeuroImage, the world’s top journal in the field of brain imaging, on May 17, with Research Professor Seo Jee-hye as the first author and Professor Min as the corresponding author.
- Title of article : Non-invasive electrical brain stimulation modulates human conscious perception of mental representation
- Article URL : https://www.sciencedirect.com/science/article/pii/S1053811924001423

The conscious perception experiment developed by Professor Min is very simple. When participants are exposed to rapidly flickering red and green, a fused color, orange, is perceived as illusory color perception. This novel color is a mental representation created only in the mind, and it was used as an experimental paradigm to differentiate between the cognition of the physical world and the cognition of the mental world.

Professor Min has continued his studies on the conscious perception of mental representation and published a paper in 2010 on the theory that the thalamic reticular nucleus (TRN), which performs inhibitory control between the thalamus, known as “the brain of the brain,” and the brain cortex is the biological center of consciousness. In addition, he published in 2020 the first experimental report based on human magnetoencephalography (MEG) signals showing that inhibitory control by the thalamus plays a pivotal role in conscious perception. Furthermore, he reported the consistent phenomenon detected by functional magnetic resonance imaging (fMRI) in 2022.

The present brain stimulation study provides more solid evidence that thalamocortical suppression is associated with the conscious perception of mental representation. When non-invasive alternating current stimulation was applied to the default-mode network of the brain, which is known to be responsible for the internal representation of conscious perception, the cognition of the mentally generated orange color significantly increased, while the activity of the higher-order thalamocortical network, which is devoted to higher-order information processing in the brain, was suppressed.

Professor Min was recently appointed as an editorial board member for BMC Neuroscience, an international journal in the field of neuroscience published by Springer Nature.

This work was supported by the Convergent Technology R&D Program for Human Augmentation funded by the National Research Foundation of Korea and the BK21 R&E Center for Precision Public Health.

 

<Figure 1>

(Figure  A) 비침습적 뇌자극 전극 배치도: (좌측부터) 후두엽, 내측 전전두엽, 등배측 전전두엽. (Figure  B) 비침습적 뇌자극 타겟 시뮬레이션 결과: (좌측부터) 후두엽, 내측 전전두엽, 등배측 전전두엽.

(Figure 1A) Diagram showing the electrode arrangement for non-invasive brain stimulation: (from left) occipital lobe, medial prefrontal cortex, and dorsal prefrontal cortex.

(Figure 1B) Results of non-invasive brain target simulation: (from left) occipital lobe, inner prefrontal lobe, and dorsal prefrontal lobe.

 

 

<Figure 2>

(Figure  C) 뇌자극이 없을 때의 주황 합성색 인식이 물리적으로 제시된 빨강/녹색 인식 보다 뇌활성도가 큰 지역의 위치 Figure . (Figure  D) 내측 전전두엽(mPFC)에 비침습적인 뇌자극을 주었을 때에, 정신 세계에서 생성된 주황 합성색 인식에서 고차원적인 시상-피질 영역의 활동성이 줄어듬.

(Figure 2C) Diagram illustrating regions where brain activity for the cognition of the fused orange color was greater than the activity for the cognition of the physically present red and green colors in the absence of brain stimulation.

(Figure 2D) When non-invasive brain stimulation was applied to the medial prefrontal cortex (mPFC), the activity of the higher-order thalamocortical region decreased in the perception of the mentally generated and fused orange color.

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