The application of functional near-infrared spectroscopy in measuring the activity of prefrontal cortex in healthy individuals during balance task under single or dual task paradigm
Objective:To observe the changes of blood oxygen concentration in dorsolateral prefrontal cortex(DLPFC)by functional near-infrared spectroscopy(fNIRS)as well as the postural performance under dual cognitive-balance task versus single balance task in healthy adults.Method:Eleven healthy adults were asked to keep stability during sensory organization test(SOT)only or with a modified auditory Stroop task.fNIRS was used to measure the cerebral blood oxygen concentration of the prefrontal cortex concurrently.The changes of HbO2 were compared between single and dual task,and the pos-tural performance measured by total score of SOT was compared also.Result:There was significant increase of HbO2 concentration in all dual task conditions and in SOT6(single task)compared with resting period;the increasement indicated by the HbO2 concentration were significant(P＜0.05)in SOT1,SOT2,SOT3,SOT5 but not in SOT4 and SOT6.The postural performance showed no differ-ence under single versus dual task(P=0.152).Conclusion:Although postural performances under dual and single condition showed no difference,the signifi-cant activation of the DLPFC measured by fNIRS were showed in dual task versus single task in healthy adults.The difference of DLPFC activation between single and dual tasks indicates that the DLPFC region plays an important role in the dual tasks and dual-tasking is cognitive consuming.
万方数据
维普
