老年人在认知-平衡双任务下的皮质激活特征

doi:10.3969/j.issn.1006-9771.2023.10.010

Abstract

Abstract:

Objective To explore the characteristics of balance and cortical activation in older adults when performing cognition-balance dual tasks.
Methods From January to April, 2023, 20 healthy older adults were non-targeted recruited. They completed six tasks of close eyes & fixed platform (CF), close eyes & fixed platform & cognitive task (CFc), open eyes & sway-referenced platform (OS), open eyes & sway-referenced platform & cognitive task (OSc), close eyes & sway-referenced platform (CS), and close eyes & sway-referenced platform & cognitive task (CSc) on the Balance SD, wearing functional near-infrared spectroscopy caps. The overal stability index (OSI) was measured with Balance SD. The premotor cortex (PMC), sensorimotor cortex (SMC) and prefrontal cortex (PFC) were as regions of interest (ROIs), and the β values were calculated.
Results The OSI was more as CFc than as CF (Z = -2.014, P < 0.05), and was less as CSc than as CS (Z = -2.063, P < 0.05). The β values of bilateral ROIs were all more as CFc than as CF (|Z| > 2.464, |t| > 3.733, P < 0.05), and as OSc than as OS (|t| > 2.308, P < 0.05); the β value of the right SMC was more as CSc than as CS (t = -2.912, P < 0.05). The number of correct counts was less as CSc than as CFc and OSc (|Z| > 3.643, P < 0.001).
Conclusion Balance has been impaired under dual tasks for older adults, while activation of cerebral cortex increases. However, for more difficult balance task, older adults would preferentially maintain postural balance under dual tasks, while cognitive performance decreases, which may be the results from no more activation of cerebral cortex under dual tasks.

Key words: older adults, balance, dual task, cortical activation, functional near-infrared spectroscopy

CLC Number:

R592

KAN Chaojie, GUO Chuan, ZHU Shizhe, SUI Youxin, WANG Qinglei, ZHUANG Ren, GENG Ayan, WANG Tong. Characteristics of cortical activation in older adults under cognition-balance dual tasks[J]. 《Chinese Journal of Rehabilitation Theory and Practice》, 2023, 29(10): 1189-1194.

Figures/Tables 4

References 32

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任务	OSI	Z值	P值
CF	1.500 (1.025, 2.700)	-2.014	0.044
CFc	2.050 (1.300, 3.550)	-2.014	0.044
OS	1.300 (1.100, 1.900)	-0.545	0.586
OSc	1.450 (1.000, 1.975)	-0.545	0.586
CS	2.000 (1.650, 4.000)	-2.063	0.039
CSc	1.800 (1.425, 2.275)	-2.063	0.039

ROI	任务	β值	t/Z值	P值^a	ROI	任务	β值	t/Z值	P值^a
RSMC	CF CFc	0.018 (-0.007, 0.065) 0.044 (0.020, 0.107)	-2.464	0.014	LSMC	OS OSc	0.009±0.072 0.080±0.069	-3.554	0.006
RPMC	CF CFc	0.007±0.039 0.055±0.063	-4.688	< 0.001	LPMC	OS OSc	-0.002±0.050 0.062±0.084	-2.769	0.015
RPFC	CF CFc	0.010 (-0.031, 0.029) 0.058 (0.016, 0.125)	-3.733	< 0.001	LPFC	OS OSc	-0.021 (-0.039, 0.075) 0.090 (0.029, 0.136)	-2.800	0.009
LSMC	CF CFc	0.013±0.045 0.067±0.065	-4.966	< 0.001	RSMC	CS CSc	0.025 (-0.016, 0.065) 0.083 (0.052, 0.129)	-2.912	0.022
LPMC	CF CFc	0.004 (-0.016, 0.037) 0.053 (0.028, 0.104)	-3.808	< 0.001	RPMC	CS CSc	0.019 (0.004, 0.053) 0.085 (0.036, 0.103)	-2.315	0.062
LPFC	CF CFc	0.015±0.065 0.078±0.078	-5.043	< 0.001	RPFC	CS CSc	0.036 (-0.002, 0.092) 0.049 (0.029, 0.088)	-0.672	0.602
RSMC	OS OSc	0.010±0.077 0.082±0.102	-3.078	0.009	LSMC	CS CSc	0.025 (0.005, 0.086) 0.079 (0.026, 0.123)	-1.755	0.159
RPMC	OS OSc	0.005±0.061 0.066±0.075	-4.382	0.002	LPMC	CS CSc	0.044±.0.061 0.067±0.068	-1.283	0.322
RPFC	OS OSc	0.008±0.067 0.046±0.071	-2.308	0.032	LPFC	CS CSc	0.053 (0.013, 0.147) 0.074 (0.048, 0.105)	-0.149	0.881

任务	计算正确次数	Z值	P值
CFc OSc	4.000 (3.000, 6.750) 4.000 (3.000, 6.500)	-0.518	0.604
CFc CSc	4.000 (3.000, 6.750) 2.000 (1.000, 3.000)	-3.643	< 0.001
OSc CSc	4.000 (3.000, 6.500) 2.000 (1.000, 3.000)	-3.855	< 0.001

Characteristics of cortical activation in older adults under cognition-balance dual tasks

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