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Lateralized Functional Connectivity of the Sensorimotor Cortex and its Variations During Complex Visuomotor Tasks
Yang Yang 杨炀1,2, Junjun Li 李君君1,2, Kai Zhao 赵恺3
1CAS Key Laboratory of Behavioral Science, Center for Brain Science and Learning Difficulties, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China.
Summary
This study reveals task-invariant brain connectivity for motor control in adults, while children show developing lateralization. This highlights the brain
Area of Science:
- Neuroscience
- Motor Control
- Brain Lateralization
Background:
- Traditional views suggest left hemisphere dominance for motor function.
- Functional connectivity offers a novel approach to study brain lateralization.
- Visuomotor tasks like handwriting and drawing involve complex sensorimotor integration.
Purpose of the Study:
- To investigate sensorimotor cortex lateralization using functional connectivity during handwriting and drawing.
- To explore task-invariant versus task-specific lateralization patterns.
- To compare lateralization in adults and children.
Main Methods:
- Employed a functional connectivity approach to analyze brain activity.
- Examined primary motor cortex (M1), dorsal premotor cortex (PMd), somatosensory, and visual regions.
- Compared connectivity patterns across different visuomotor task contexts in adults and children.
Main Results:
- Adults displayed both left- and right-lateralized connectivity in sensorimotor areas, often in an interhemispheric manner.
- Lateralization patterns were largely invariant across different task contexts in adults.
- Children showed no significant connectivity-based lateralization, indicating developmental immaturity.
Conclusions:
- Sensorimotor cortex exhibits task-invariant and task-sensitive connectivity lateralization supporting skilled visuomotor performance.
- The findings suggest a hierarchical organization of the motor system.
- Functional connectivity is crucial for understanding developmental aspects of brain lateralization.
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