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Updated: Aug 25, 2026
09:49
Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior
Published on: April 16, 2014
視覚的に導かれた到達力の再校正における後部頭皮質の役割
D M Clower1, J M Hoffman, J R Votaw
1Department of Neurology, Emory University School of Medicine, Atlanta, Georgia 30322, USA.
Nature
|October 17, 1996
まとめ
この研究では,PETスキャンを使用してセンソモーター適応を調査しました. 研究者らは,手と目の協調に不可欠なプリズマの適応の間に,後部側頭皮質が選択的に活性化することを発見しました.
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
- モーター・コントロール・コントロール
背景:
- 視覚的に導かれた到達には,感覚の入力と運動の出力を結びつける複雑な神経処理が含まれます.
- 人間の手眼協調は,変化した視覚フィードバックに適応する際の驚くべき柔軟性を示しています.
- プリズマ適応の研究では,視覚的歪みに応じて,到達する動きの急速な再調整が示されています.
研究 の 目的:
- プリズマ曝露中のセンソモーター適応の機能的局所化を決定する.
- 視覚的移転に到達する動きを適応させるのに関与する脳領域を特定する.
主な方法:
- ポジトロン放出トモグラフィー (PET) は,地域脳血流量 (rCBF) を測定するために使用されました.
- 被験者はプリズマ適応タスクと,感覚,運動,認知要因を考慮した制御タスクを実行した.
- 差異画像は,適応プロセスに関連する純変化を分析した.
主要な成果:
- 伸縮する肢に逆行する後部頭皮質の選択的活性化が観察されました.
- このアクティベーションは,プリズマによって引き起こされる視覚的歪みに対する感覚運動の適応と相関していた.
- コントロールタスクでは同様のアクティベーションパターンが示されず,適応効果は孤立した.
結論:
- 背後の頭皮質は,視覚的に導かれた到達のためのセンソモーター適応において重要な役割を果たします.
- PETイメージングは,視覚運動変容に適応する神経基盤を成功裏に局所しました.
- 発見は,運動学習と再校正の基礎となる神経機構の理解に貢献します.
関連する概念動画
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.
01:14Motor 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.
01:21Association 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,...
01:28Major Somatic Sensory Pathways
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 posterior columns...
01:22Indirect Motor Pathways
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...
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...