|Alternative Title||Elite Diving Players' Structural and Functional Plasticity: MRI and FMRI Studies|
Over the past 20 years, there has been a growing interest in the study of the neurosubstrate of movement the subjects of the findings, however, are still confined within the normal or the patient. Sport experts are the kind of population who are involved in professional motor training for at least decades and acquired motor expertise and good vision. Therefore, they could be regarded as ideal subjects to study the relationship between the movement and the brain. In our studies, we recruited elite diving players and the controls matched in the age9 gender and weight as the subjects to explore the difference of cerebral structure and function with the help of the MRI and functional MRI.
In study 1, we compared, through functional magnetic resonance imaging (fMRI), the pattern of cerebral activations in 12 professional divers and 12 normal people without extensive training, during imagery of professional skills and imagery of simple motor skills. The sport experts showed significant activation in the parahippocampus during imagery of professional skills relative to the novices, which might reflect the representation adapted to experience-related motor tasks. No significant difference was found between experts and novices when they imagined simple motor skills. These results indicated the experts might utilize their kinesthetic imagery more efficiently than novices, but only for the activity in which they had expertise. The sport experts also demonstrated more focused activation patterns in prefrontal areas in both of imagery tasks, which may be relevant to higher order of motor control during motor imagery.
In study 2, based on voxel-based morphometric (VBM) technique, structural MRIs of the brains of 12 elite diving players with professional training were analyzed and compared with those of control subjects without any professional physical training. Diving players showed significantly increased gray matter density in thalamus and left precentral gyros than control subjects. However, future researches are needed to prove the contribution of preposition and practice.
In brief, there are significant differences between sport experts and the general people in cerebral stricture and the function related to the movement. Moreover, this study suggested that the brains of sport experts could be regarded as the ideal subjects to explore the relationship between cerebral plasticity and learning of complex motor skills.
|Keyword||神经可塑性 专家知识系统 体素形态学 磁共振 运动员 丘脑 海马旁回 前额叶|
|魏高峡. 优秀跳水运动员脑功能和脑结构的可塑性研究[R]. 北京,2009.|
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