| Exercise is a traditional and effective way to build up our bodies, and it is helpful to keep health for us, to which has been paid attention for a long time. Recently, aerobic exercise is thought to be the best brain training method and exercise is reported to be able to stay brain aging. As our society gradually entering into old aging, the normal brain aging problem follows, because brain aging is an objective regular pattern. Therefore, using diffusion tensor imaging technique, correlation changes between brain tissue that dedicate to motor functions and age are observed through a series of diffusion index parameters. This thesis is hoped to give some help to make the process of brain aging clear and slow the process down. Meanwhile, we assume that some help can be given for physical education when the relationship between motor function decline and cerebral physical tissues is recognized.86 health participants were chosen as subjects, and the datasets downloaded from ICBM database.Fractional anisotropy, mean diffusion, longitudinal diffusivity and transverse diffusivity were selected as diffusion index parameters in the experiment. Bilateral corticospinal tracts at pyramidal system and bilateral corpus striatums (include caudate nucleus, pallidum and putamen) at the extrapyramidal system were choosed as observed brain tissue parts.All the diffusion index parameters value of each parts were averaged as statistics for statistic analysis.1) paired-t test was employed to compare the difference between each bilateral parts by their diffusion index parameters value (FA, MD,λL andλT) along with aging.2) One-Way AN OVA was used to find the difference of each groups by their index parameters value, LSD method was selected as paired comparison approach. The index parameter values of each parts have been drawn multiple line charts.3) pearson correlation was exerted to research the correlation between the index values of each parts and age, the correlation coefficients were computed and the tendency charts of aging were drawn.Through the experiment, the greatest difference was found in bilateral pallidums and the least difference was in bilateral putamens. Comparing between the five age groups, it was found that group V have the most significant difference. In comparing analysis, it was also discovered that putamens had the most difference among groups since each indexs of putamens has the significant difference, while caudates has the least. By analyzing the multiple line charts of five groups'index parameters values, it was found that corticospinal tracts'FA values were higher than other three parts, while its MD,λL,λT were lower than the others; MD values'overall change is similar toλT. In the section of analyzing correlation between motion functional brain tissue and aging, it was found that all the index parameters of corticospinal tracts and pallidums had a positive correlation with age. Besides, the left putamen's MD,λL andλT had a certain extent positive correlation with age, while the right putamen'sλL had irrelevance and FA has a certain degree negative correlation. And indexs parameters value of every caudate had a feeble correlation with age. In brief, as the age grows, the general trend of all index parameter values in all selecting parts showed that FA values declined, while MD,λL,λT values rised, and caudate nucleus changed least. |
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