This study will first conduct a precise assessment of the differences in muscle coordination among the elderly through muscle synergy analysis; then, based on this, it will extract abnormal synergy patterns and muscle activation patterns, and reconstruct the intervention's synergy modules to fit the intervention electrostimulation curve; finally, electrical stimulation interventions will be carried out on different elderly individuals under two conditions: sitting and walking, to evaluate the intervention effects and analyze the biomechanical mechanisms of its effectiveness.
The research subjects of this project mainly focus on young people, middle-aged individuals, and elderly individuals who are able to move independently. The investigator's goal is to explore the kinematic and dynamic characteristics of different populations. The main research activities include recruiting young volunteers, middle-aged volunteers, and elderly volunteers who can move independently. Through motion capture, the kinematic data and surface electromyography (sEMG) signal confidence intervals of young and middle-aged subjects are analyzed, and then the kinematic data and sEMG data of independently mobile elderly individuals are examined. The investigator aims to identify multiple muscles that show significant differences compared to normal individuals, and then assess the effectiveness of functional electrical stimulation based on coordinated movement. Additionally, using in vivo motion technology, the investigator will establish a human biomechanics database to analyze the biomechanical characteristics of different populations under various movement conditions.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
30
Functional electrical stimulation based on muscle synergy
Traditional functional electrical stimulation
Muscle electrical signals
Electromyographic signals were collected from 16 muscles of the trunk and ipsilateral leg using a wireless EMG system (Mini Wave Infinity by Cometa, Italy) at a frequency of 2000 Hz, with an interelectrode distance of 20 mm.
Time frame: On the first day of the study, muscle electrical signals were tested using electromyography equipment. After one month of intervention, these indicators were measured again, followed by a one-year follow-up with the participants until the study ended.
Important indicators kinematic data
Attach Mark points to the subjects and capture kinematic data through an infrared camera.The movement of the foot and lower limb joints was captured using eight optical infrared cameras (also sampled at 100 Hz; Miqus M1, Qualisys, Sweden) and one camera lens (Miqus Video, Qualisys, Sweden), calculating the positions of 56 optical markers.
Time frame: On the first day of the study, kinematic data, including joint angles and stride length, were collected using the Qualisys gait analysis system. After one month of intervention, these measurements were taken again
Secondary indicators
Plantar pressure, distribution of plantar pressure on the left and right feet at rest, and distribution of pressure intensity on the left and right feet while walking
Time frame: On the first day of the study, foot pressure was measured using a plantar pressure testing mat, followed by a one-month intervention, after which the same indicators were measured again. Subsequently, the subjects were followed up for one year
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