| Multimodal investigation of anticipatory postural adjustments in AIS: Convex/concave asymmetry across central, peripheral, and biomechanical dimensions |
| |
| DOI：10.3870/zgkf.2026.09.004 |
| EN KeyWords: adolescent idiopathic scoliosis anticipatory postural adjustments paraspinal muscle asymmetry event-related desynchronization postural control convex/concave mapping |
| Fund Project:国家自然科学基金（82172532）；广东省康复医学临床医学研究中心项目（2023B110003） |
|
| View Counts: 227 |
| PDF Download Counts: 103 |
| EN Abstract: |
| Objective: To investigate the central-peripheral-biomechanical features of anticipatory postural adjustments in adolescent idiopathic scoliosis (AIS) during a rapid arm raise task. Methods: Totally, 38 subjects were enrolled: 11 healthy controls, 14 mild AIS, and 13 moderate AIS. Participants performed rapid bilateral arm raises while 32-channel electroencephalography, surface electromyography of eight trunk muscles, and force platform center of pressure (COP) data were synchronously recorded. Single-trial EEG movement-related cortical potentials and event-related desynchronization were extracted using sEMG-detected movement onset as the temporal anchor and aggregated after group-level outlier cleaning. Statistical analysis combined trial-level linear mixed models with subject-level analysis of covariance in a hierarchical strategy. Results: The mild group showed lower convex-side paraspinal integrated EMG than the concave side, whereas the moderate group exhibited a reversed pattern with high-energy convex-side compensation (P=0.006). Movement-related cortical potential amplitude followed an health control > mild > moderate gradient (P=0.018). Body mass index independently modulated both central motor preparation timing and peripheral postural mechanical output (P=0.007). Thoracic-curve sensitivity analysis confirmed these findings. Conclusion: The primary APA abnormality in AIS is convex/concave paraspinal energy maldistribution that worsens during repeated rapid movements. BMI may modulate both cortical preparation timing and biomechanical postural output through inertial loading. Convex/concave mapping combined with synchronized EEG-sEMG-COP analysis may help characterize neuromuscular control deficits in AIS and may provide a basis for individualized fatigue-aware rehabilitation assessment. |
|
查看全文
Download PDF Reader HTML Full Text |
| Close |
|
|
|
