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皮質・基礎性ガンリア回路における秘密の技能学習
Jonathan D Charlesworth1, Timothy L Warren, Michael S Brainard
1W. M. Keck Center for Integrative Neuroscience, Department of Physiology, University of California, San Francisco, California 94143, USA. jcharles@phy.ucsf.edu
Nature
|June 16, 2012
まとめ
前頭前脳の経路 (AFP) は,探索的行動を生成するのではなく,結果を監視することによって複雑なスキルを秘密裏に学習します. このベースガンリア回路は,スキルの迅速な獲得と実装を可能にします.
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
- 動物の行動 動物の行動
背景:
- スキル学習は,話し方やダンスと同様に,段階的な試行錯誤プロセスを含む.
- 皮質基底ギャングリア回路は,スキルの習得に不可欠ですが,その正確な機能は議論の余地があります.
- 俳優批判的モデルでは,基礎性腺がトレーニング中に行動を生成し,精製することを示唆しています.
研究 の 目的:
- 複雑なスキルの学習における,前頭前頭脳経路 (AFP),皮質-基礎のギャングリア回路の役割を調査する.
- AFPが学習中の探索的行動変化に寄与するかどうかを判断する.
- AFPがスキル獲得とパフォーマンスを促進するメカニズムを解明する.
主な方法:
- ベンガルのフィンチを研究し,彼らの歌を修正することを学びました.
- 行動の変化と学習におけるその役割を評価するために,トレーニング中にAFPの出力をブロックしました.
- 学習の必要性を評価するために,トレーニング中にAFPの出力核を無効にしました.
- パフォーマンスの移行を観察するために,トレーニング後のAFP出力ブロックを解除します.
主要な成果:
- 歌の学習中にAFPの出力をブロックすると,徐々に改善が妨げられました.
- 訓練中にAFPの出力核を非活性化すると,学習が完全に抑制されます.
- 訓練後にAFPの出力をブロック解除すると,即座に優れたパフォーマンスが得られました.
- AFPは,練習中に探索的なバリエーションに貢献することなく,スキルを実装することを学びました.
結論:
- AFPは,探索的行動を生み出すのではなく,行動の結果を監視することによって,スキルの学習に貢献します.
- ベースリンパ節回路は,他の脳の領域を成功する行動を実装するように指示することができます.
- AFPは,前運動活動の詳細なエフェランスコピーを受信し,秘密のスキルの獲得を可能にします.
- 性能を実装するために,基礎性腺と運動制御領域の間には,正確な機能的接続が存在します.
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01:25Neural Circuits
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Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
01:12Observational Learning
Albert Bandura's observational learning, also known as imitation or modeling, occurs when a person observes and imitates another's behavior. It is a quicker process than operant conditioning. A well-known example is the Bobo doll study, where children who saw an adult acting aggressively towards the doll were more likely to act aggressively when left alone, compared to those who observed a nonaggressive adult. Many psychologists view observational learning as a form of latent learning because...
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.
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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.
01:23Somatosensory, 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...
01:22Purposive Learning
E. C. Tolman emphasized the purposiveness of behavior — the idea that much of our behavior is goal-directed. For instance, employees who aim for a promotion work diligently to meet their targets. Tolman argued that when classical conditioning and operant conditioning occur, the organism acquires certain expectations. In classical conditioning, a child might fear a dog because they expect it to bite. In operant conditioning, a person might consistently work overtime because they expect a bonus...
01:21Cognitive Learning
Cognitive learning is based on purposive behavior, incidental learning, and insight learning.
E. C. Tolman's theory of purposive behavior emphasizes that much behavior is goal-directed. He argued that to understand behavior, we must look at the entire sequence of actions leading to a goal. For instance, high school students study hard, not just due to past reinforcement but also to achieve the goal of getting into a good college.
Tolman introduced the idea that behavior is influenced by...
E. C. Tolman's theory of purposive behavior emphasizes that much behavior is goal-directed. He argued that to understand behavior, we must look at the entire sequence of actions leading to a goal. For instance, high school students study hard, not just due to past reinforcement but also to achieve the goal of getting into a good college.
Tolman introduced the idea that behavior is influenced by...