Brain Activation in Active,Passive and Imaginary Elbow Flexion Movements:an fNIRS Study
Objective To investigate the characteristics of brain activation in active elbow flex-ion,passive elbow flexion and imaginary elbow flexion in healthy adults using functional near-in-frared spectroscopy(fNIRS).Methods 30 healthy college students were selected as subjects,15 of each gender,aged(21.22±1.42)years old.Active,passive and imaginary elbow flexion tasks on the right hand were selected as stimulation paradigms,and fNIRS was used to collect real-time oxyhemoglobin(HbO2)concentrations in brain functional areas under three different motor para-digms as the characteristic values of brain activation.The resting state HbO2 concentration was used as the baseline value to compare the characteristics of brain activation under the three differ-ent motor paradigms.Results The nonparametric test results showed that under different motor paradigms,there were statistically significant differences in HbO2 levels in the right primary mo-tor cortex(H=13.309,P=0.004),the right prefrontal anterior cortex(H=20.30,P＜0.001),the right dorsolateral prefrontal cortex(H=12.194,P=0.007),the left primary somatosensory cor-tex(H=12.642,P=0.005),the left primary motor cortex(H=20.03,P＜0.001),left anterior prefrontal cortex(H=18.187,P＜0.001),and left dorsolateral prefrontal cortex(H=13.379,P=0.004);however,there were no statistically significant differences in the right primary somato-sensory cortex(H=4.284,P=0.232),the right anterior motor cortex and auxiliary motor cortex(H=4.201,P=0.241),and the left anterior motor cortex and auxiliary motor cortex(H=8.793,P=0.052).Conclusion There are specific functional brain regions activated under different motor paradigms,with both similarities and differences in the degree of activation,with the most similar brain activated regions in active and passive movement tasks.
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