parietal cortex のニューロンによる意思決定に関連する信頼の表現
Roozbeh Kiani1, Michael N Shadlen
1Howard Hughes Medical Institute, National Primate Research Center and Department of Physiology and Biophysics, University of Washington, Seattle, WA 98195, USA. roozbeh@u.washington.edu
Science (New York, N.Y.)
|May 9, 2009
まとめ
意思決定と選択の確実性のニューラルメカニズムは,レサス猿で研究されました. 意思決定を代表する同じ頭皮質の神経細胞は,確実性もコードし,自信が選択にどのように影響するかを明らかにします.
科学分野:
- 神経科学は神経科学である.
- コグニティブ・サイエンス コグニティブ・サイエンス
- 意思決定のための研究
背景:
- 感知的な意思決定メカニズムは霊長類でよく研究されています.
- 選択の確実性のニューラル基盤は,依然としてほとんど不明である.
- 意思決定に対する自信は,結果の段階的な評価を提供します.
研究 の 目的:
- 選択のニューラルメカニズムを調査する. 意思決定における確実性.
- 意思決定に関連する神経活動も信頼をコードするかどうかを判断する.
- 自信がコミットまたはオプトアウトの決定にどのように影響するか理解する.
主な方法:
- レサス猿は,さまざまな難易度で方向差別のタスクを実行した.
- 試験のサブセットでは,猿が保証された報酬をオプトアウトすることを許可し,選択の確実性を明らかにしました.
- 意思決定の際に表皮質の神経活動が記録された.
主要な成果:
- parietal cortex のニューロンは,決定そのものと確実性の程度の両方を表すことが判明しました.
- 猿のオプトアウト行動は,判断の確実性の評価レベルと相関していた.
- これは,意思決定形成と信頼のための統一された神経表現を示唆しています.
結論:
- parietal cortexは,決定とその決定に対する信頼の両方をコーディングする上で重要な役割を果たします.
- 確実性のニューラル表現は,意思決定プロセスに統合されています.
- この発見は,自信と選択行動のニューラル基盤に関する私たちの理解を前進させます.
関連する概念動画
01:23Somatosensory, Motor, and Association Cortex
The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at the...
01:21Association Areas of the Cortex
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,...
01:14Motor and Sensory Areas of the Cortex
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.
01:33Somatosensation
The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
01:22Lobes of the Cerebrum
The cerebral cortex, a critical structure of the brain, is intricately divided into two hemispheres, each consisting of four distinct lobes: occipital, temporal, frontal, and parietal. These lobes function cooperatively to regulate various cognitive and sensory functions, forming the basis of our complex neural capabilities.
Frontal lobe
The frontal lobes, located behind the forehead, are the command center of our brain, controlling personality, intelligence, and voluntary muscle movements.
Frontal lobe
The frontal lobes, located behind the forehead, are the command center of our brain, controlling personality, intelligence, and voluntary muscle movements.
01:14Role of Cerebellum and Prefrontal Cortex in Memory
The cerebellum, while traditionally associated with motor control, also plays a crucial role in memory, particularly in procedural memory, which involves learning motor tasks that become automatic through repetition. For example, studies have shown that when the cerebellum is damaged, individuals or animals lose the ability to learn conditioned motor responses, such as the conditioned eye-blink response in classical conditioning experiments with rabbits. This study demonstrates the cerebellum's...