疲劳诱导的姿势不稳定性在MS妇女的双重任务:肌肉力量的影响
Zahra Golzari1, Farhad Ghadiri1, Moslem Bahmani2
1Department of Motor Behavior, Kharazmi University, Tehran, Iran.
Journal of motor behavior
|September 12, 2025
概括
疲劳和双重任务挑战显著损害了多发性硬化症 (MS) 妇女的平衡. 这些因素在MS患者中比在健康个体中更严重地恶化了姿势摇摆,突出了针对性干预的关键需求.
科学领域:
- 神经学 神经学
- 生物力学 生物力学
- 康复科学 康复科学 康复科学
背景情况:
- 在多发性硬化症 (MS) 中,对疲劳和双重任务运动性能进行的研究有限,特别是在女性中.
- 姿势控制缺陷在MS中很常见,影响日常功能和跌倒风险.
研究的目的:
- 为了研究疲劳和注意力需求对MS患者与健康对照者的姿势控制 (压力中心位移) 的影响.
- 评估不同任务条件下的脚足部 flexor 强度和平衡性能之间的关系.
主要方法:
- 20名患有多发性硬化症的女性和20名健康对照人进行了直立姿势任务.
- 测量包括压力中心 (COP) 位移 (前后,中侧,总体) 和脚脚下屈曲器强度.
- 诱导疲劳,并比较单任务与双任务 (注意力需求) 条件.
主要成果:
- 在所有参与者中,疲劳和双重任务都增加了中侧侧 (ML) COP 位移.
- 与对照组不同的是,MS患者在双重任务期间与单一任务相比,表现出更大的ML位移.
- 在MS患者中,疲劳在双重任务期间更显著地加剧了前后 (AP) 和总COP位移.
- 多发性硬化症患者的脚脚下 flexors较弱,与单身MVC与疲劳的MS患者的单任务平衡相关.
结论:
- 疲劳和双重任务对MS患者的平衡控制产生不利影响,比健康人群更严重.
- 脚足部曲器的强度可能在保持平衡方面发挥作用,特别是在MS的疲劳条件下.
- 需要进一步的研究来探索脚下 flexor 强度,疲劳和注意力要求在MS平衡性能之间的相互作用.
相关概念视频
Isotonic and Isometric Muscle Contractions
Two primary types of muscle contractions are isotonic and isometric, each serving unique functions and involving distinct mechanisms. Both isotonic and isometric contractions are integral to the body's complex system of movement and stability. Isotonic exercises contribute significantly to functional strength and movement, while isometric contractions are crucial for maintaining posture and joint stability.
Isotonic contractions
Isotonic contractions occur when a muscle changes length while the...
Isotonic contractions
Isotonic contractions occur when a muscle changes length while the...
Disorders of the Skeletal Muscle
The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
Exercise and Muscle Performance
Exercise induces a range of adaptations in muscle tissue, depending on the type and duration of activity. Such physical training can be broadly categorized into two types: endurance exercises and resistance exercises.
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
Multiple Sclerosis l: Introduction
Multiple sclerosis is a chronic autoimmune disease of the central nervous system (CNS) that affects the brain, spinal cord, and optic nerves. It is an inflammatory demyelinating disorder and a leading cause of neurological disability in young adults.EpidemiologyMS commonly begins between 20 and 40 years of age and is twice as common in women. Its exact cause remains unclear, but genetic susceptibility contributes, with higher risk in first-degree relatives and identical twins. A greater...
Alterations in Muscle Tone ll
Alterations in muscle tone are common manifestations of neurological disorders and reflect dysfunction within different nervous system regions. Spasticity, paratonia, and dystonia represent distinct forms of hypertonia, each with unique mechanisms, clinical features, and diagnostic importance.CharacteristicsSpasticity happens from upper motor neuron lesions and is characterized by velocity-dependent resistance to passive movement. Clinical features include:Exaggerated deep tendon reflexesClonus...
Alterations in Muscle Tone lll
Rigidity and myotonia are distinct abnormalities of muscle tone that affect resistance and relaxation during movement. Although both involve altered muscle contraction, they arise from different neurological and muscular mechanisms.CharacteristicsRigidity is characterized by uniform resistance to passive movement across the entire range, independent of speed, affecting flexors and extensors equally. It may appear as lead-pipe rigidity (smooth, constant resistance) or cogwheel rigidity...


