関連する実験動画
Updated: Mar 1, 2026

05:07
Using Looming Visual Stimuli to Evaluate Mouse Vision
Published on: June 13, 2019
12.4K
人間の上丘経路は、迫りくる物体の形状と動きを表す
Monica K Thieu1, Meera Sethi1, Elias Aberman1
1Department of Psychology, Emory University, Atlanta, GA, USA.
Cell reports
|February 27, 2026
まとめ
中脳構造である上丘は、物体運動とカテゴリを処理することにより、迫りくる脅威の検出を助けます。その活動は感情的反応に関連しており、感情の脳中心説に異議を唱えています。
科学分野:
- 神経科学;認知科学;計算神経科学
背景:
- 上丘(SC)は、脅威検出と応答に不可欠な中脳構造です。;人間の認知と感情処理におけるその正確な役割は完全には理解されていません。
研究 の 目的:
- fMRIと計算モデリングを使用して、迫りくる脅威に対する上丘の応答を調査すること。;SCが脅威関連情報をどのように符号化するか、およびそれが感情体験との関連を理解すること。
主な方法:
- 2つの実験における課題ベースの機能的磁気共鳴画像法(fMRI)。;衝突検出、物体認識、および視覚的顕著性のためのタスク最適化ニューラルネットワークを使用した計算モデリング。;機能的接続性と自己申告された感情測定値の分析。
主要な成果:
- 人間の上丘は、迫りくる物体の運動とカテゴリに関する情報を符号化します。;符号化モデルは、個人間でSC活動を正確に予測しました。;SC応答は、自己申告された恐怖、感情価、覚醒度、および感情の脳署名と相関していました。
結論:
- 上丘は、より広範な皮質下ネットワーク内の脅威検出において重要な役割を果たします。;これらの発見は、感情体験の純粋に皮質中心のモデルに異議を唱えます。;SCは、脅威知覚中の感覚情報と感情処理を統合します。
関連する概念動画
Motor and Sensory Areas of the Cortex
8.4K
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....
8.4K
Indirect Motor Pathways
3.7K
The indirect motor or extrapyramidal pathways originate in the brainstem, the lower portion of the brain that connects it to the spinal cord. They consist of several distinct tracts, each with specialized functions. The four main tracts of the indirect motor pathways are the vestibulospinal tract, the reticulospinal tract, the tectospinal tract, and the rubrospinal tract.
The vestibulospinal tract originates in the vestibular nuclei of the brainstem. The vestibular system detects changes in...
The vestibulospinal tract originates in the vestibular nuclei of the brainstem. The vestibular system detects changes in...
3.7K
Association Areas of the Cortex
10.0K
Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
10.0K
Major Somatic Sensory Pathways
3.2K
Sensory impulses related to touch, pressure, vibration, and proprioception from various body parts, such as the limbs, trunk, neck, and posterior head, travel to the cerebral cortex through the posterior column-medial lemniscus pathway. The pathway’s name derives from the two white-matter tracts that convey the impulses: the spinal cord's posterior column and the brainstem's medial lemniscus. First-order sensory neurons extend their axons into the spinal cord, forming the...
3.2K
Vision
60.8K
Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
60.8K
Visual System
2.1K
Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
Once through the pupil, the light passes through the lens, a...
2.1K

