Department of Rehabilitation, School of Health and Welfare, Jönköping University, Sweden.
Department of Orthopaedics, Sahlgrenska University Hospital, Gothenburg, Sweden; Department of Orthopaedics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Swede.
J Rehabil Med. 2024 Aug 22;56:jrm40111. doi: 10.2340/jrm.v56.40111.
To explore cognitive load in people with transfemoral amputations fitted with socket or bone-anchored prostheses by describing activity in the left and right dorsolateral prefrontal cortices during single- and dual-task walking.
Cross-sectional pilot study.
8 socket prosthesis users and 8 bone-anchored prosthesis users. All were fitted with microprocessor-controlled prosthetic knees.
Participants answered self-report questionnaires and performed gait tests during 1 single-task walking condition and 2 dual-task walking conditions. While walking, activity in the dorsolateral prefrontal cortex was measured using functional near-infrared spectroscopy. Cognitive load was investigated for each participant by exploring the relative concentration of oxygenated haemoglobin in the left and right dorsolateral prefrontal cortex. Symmetry of brain activity was investigated by calculating a laterality index.
Self-report measures and basic gait variables did not show differences between the groups. No obvious between-group differences were observed in the relative concentration of oxygenated haemoglobin for any walking condition. There was a tendency towards more right-side brain activity for participants using a socket prosthesis during dual-task conditions.
This pilot study did not identify substantial differences in cognitive load or lateralization between socket prosthesis users and bone-anchored prosthesis users.
通过描述单任务和双任务行走时左右背外侧前额叶皮质的活动，探讨全股骨截肢者佩戴接受腔或骨锚式假肢时的认知负荷。
横断面初步研究。
8 名接受腔假体使用者和 8 名骨锚式假体使用者。所有患者均配备微处理器控制的假肢膝关节。
参与者在 1 种单任务行走条件和 2 种双任务行走条件下回答自我报告问卷并进行步态测试。在行走过程中，使用功能近红外光谱法测量背外侧前额叶皮质的活动。通过探索左右背外侧前额叶皮质中氧合血红蛋白的相对浓度，研究每个参与者的认知负荷。通过计算侧化指数来研究大脑活动的对称性。
自我报告的测量和基本步态变量在组间没有差异。在任何行走条件下，接受腔假体使用者的氧合血红蛋白相对浓度均无明显的组间差异。在双任务条件下，使用接受腔假体的参与者表现出更多的右侧大脑活动趋势。
本初步研究未发现接受腔假体使用者和骨锚式假体使用者之间在认知负荷或侧化方面存在显著差异。
