不同感觉策略下老年人平衡控制的皮质激活特征

doi:10.3969/j.issn.1006-9771.2024.07.014

Abstract

Abstract:

Objective To investigate the balance control abilities and cortical activation characteristics of elderly individuals under different sensory strategies.
Methods From January to May, 2023, 19 healthy young adults and 20 elderly individuals were recruited in Changzhou as control group and experimental group, respectively. Both groups wore functional near-infrared spectroscopy (fNIRS) caps and performed balance control tasks on a balance platform under three different sensory strategies. Test A was 40 seconds of standing on a stable surface with eyes closed, Test B was 40 seconds of standing on an unstable surface with eyes open, and Test C was 40 seconds of standing on an unstable surface with eyes closed. Before and after the tests, both groups performed 40 seconds of standing on a stable surface with eyes open. The overall stability index (OSI) and cortical activation β values of the regions of interest (ROI) were measured and compared between two groups. The ROIs included the left premotor cortex (LPMC), right premotor cortex (RPMC), left sensorimotor cortex (LSMC), right sensorimotor cortex (RSMC), left prefrontal cortex (LPFC) and right prefrontal cortex (RPFC).
Results There was no significant difference in OSI and β values of each ROI in Tests A and B between two groups (P > 0.05). In Test C, there was a lower OSI in the experimental group (Z = -2.056, P < 0.05), and there were significant differences in the β values of RSMC (t = 2.623, P_FDR < 0.05), LPMC (Z = -2.360, P_FDR < 0.05) and LPFC (t = 3.202, P_FDR < 0.05) between two groups.
Conclusion Elderly individuals experience a decline in balance control abilities, accompanied by increased activation in related brain regions, when both vision and proprioception are restricted.

Key words: elderly, sensory strategies, balance, cortical activation, functional near-infrared spectroscopy

CLC Number:

R161.7

DONG Ping, KAN Chaojie, GUO Chuan, ZHUANG Ren, WANG Qinglei, QIAN Xue. Characteristics of cortical activation in balance control under different sensory strategies in the elderly[J]. Chinese Journal of Rehabilitation Theory and Practice, 2024, 30(7): 848-853.

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Figure 1

Table 1

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References 24

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任务	对照组(n = 19)	试验组(n = 20)	Z值	P值
试验A	0.900(0.700, 1.900)	1.500(1.025, 2.700)	-1.760	0.078
试验B	1.400(0.800, 1.600)	1.300(1.100, 1.900)	-0.986	0.324
试验C	1.600(1.400, 2.200)	2.000(1.650, 4.000)	-2.056	0.040

任务	ROI	对照组(n = 19)	试验组(n = 20)	t值/Z值	P_FDR值
试验A	RSMC	0.016±0.047	0.028±0.050	0.769	0.885
	RPMC	0.015±0.078	0.007±0.039	-0.396	0.885
	RPFC	0.013±0.067	0.001±0.073	-0.146	0.885
	LSMC	0.021±0.062	0.013±0.045	-0.499	0.885
	LPMC	0.015±0.077	0.009±0.045	-0.253	0.885
	LPFC	-0.001±0.069	0.015±0.065	0.779	0.885
试验B	RSMC	0.010(-0.070, 0.066)	0.006(-0.257, 0.486)	-0.393	0.748
	RPMC	-0.005±0.081	0.005±0.005	0.468	0.748
	RPFC	-0.005±0.077	0.008±0.067	0.564	0.748
	LSMC	0.002±0.065	0.009±0.072	0.324	0.748
	LPMC	-0.016±0.075	-0.002±0.050	0.671	0.748
	LPFC	-0.016(-0.070, 0.120)	-0.021(-0.039, 0.075)	-0.365	0.748
试验C	RSMC	-0.016±0.075	0.043±0.066	2.623	0.036
	RPMC	-0.002(-0.051, 0.062)	0.019(0.004, 0.053)	-1.489	0.163
	RPFC	0.021(0.004, 0.039)	0.036(-0.002, 0.092)	-0.618	0.536
	LSMC	0.008±0.077	0.050±0.073	1.815	0.117
	LPMC	-0.002(-0.062, 0.047)	0.036(0.014, 0.075)	-2.360	0.036
	LPFC	-0.002±0.076	0.080±0.083	3.202	0.018

Characteristics of cortical activation in balance control under different sensory strategies in the elderly

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