在站立的爆炸加速过程中,胃膜神经肌肉激活
Ana Ferri-Caruana1, Carlos Sendra-Pérez2,3, Jose Ignacio Priego-Quesada2,4
1Prevention and Health in Exercise and Sport (PHES) Research Group, Department of Physical Education and Sports, University of Valencia, 46010 Valencia, Spain.
Life (Basel, Switzerland)
|November 27, 2024
概括
介面胃角 (MG) 激活得更早,并且在爆炸性启动的第一个脚接触时比侧面胃角 (LG) 收缩得更长. 第三只脚接触显示了两个肌肉的神经肌肉激活模式的不同.
科学领域:
- 运动医学 运动医学
- 生物力学 生物力学
- 人体生理学 人体生理学
背景情况:
- 胃角肌对于体育运动中的爆炸性运动至关重要,并且受伤率很高,特别是中间胃角肌 (MG).
- 了解中侧胃角 (MG) 和侧侧胃角 (LG) 之间的神经肌肉激活差异对于预防运动员受伤和提高运动员表现至关重要.
研究的目的:
- 为了比较中侧胃角 (MG) 和侧侧胃角 (LG) 的神经肌肉激活模式,在站立爆炸加速的初始脚接触期间.
- 调查在模拟运动特定运动期间,MG和LG的肌肉收缩的时间,峰值活动和持续时间.
主要方法:
- 对42名身体活跃的参与者 (34名男性,8名女性) 进行了电肌图 (EMG) 分析.
- 参与者接受了MG和LG的EMG评估,这是在站立爆炸加速的前四英尺接触期间,模拟了运动错误启动.
- 统计分析比较了不同脚接触的MG和LG之间的神经肌肉激活参数.
主要成果:
- 第三只脚接触显示了LG和MG之间显著不同的神经肌肉激活.
- 与中间胃膜 (MG) 相比,侧面胃膜 (LG) 在第三只脚接触时显示出更早的激活和更高的EMG峰值活动.
- 在所有脚接触中,中部胃膜 (MG) 的收缩持续时间较长,除了第三次接触外,其中的模式不同.
结论:
- 在爆炸加速的初始脚接触时,中侧胃膜 (MG) 显示较早的激活和较长的收缩时间,而不是侧侧胃膜 (LG).
- 与其他接触相比,第三只脚接触代表了一个独特的阶段,在中侧胃角 (MG) 和侧侧胃角 (LG) 之间具有明显的神经肌肉激活动态.
相关概念视频
Muscles of the Leg that Move the Foot and Toes
1.2K
The human leg comprises an intricate system of muscles that facilitate the movement of feet and toes. Within this system, the muscles are categorized into the anterior, lateral, and posterior compartments, each with a unique set of muscles carrying out specific functions.
Anterior Compartment
The anterior compartment includes muscles that contribute to the dorsiflexion of the foot. This compartment houses the tibialis anterior, extensor hallucis longus, and extensor digitorum longus muscles....
Anterior Compartment
The anterior compartment includes muscles that contribute to the dorsiflexion of the foot. This compartment houses the tibialis anterior, extensor hallucis longus, and extensor digitorum longus muscles....
1.2K
Muscles that Move the Leg
1.4K
The movement of the legs is facilitated by numerous muscles located within the anterior, medial, and posterior compartments of the thigh.
Anterior Compartment
The quadriceps femoris, the most visible muscle of the anterior compartment, is integral for leg extension and thigh flexion. It is formed by merging four distinct muscles — the vastus lateralis, vastus medialis, vastus intermedius, and rectus femoris. The quadriceps tendon, a shared tendon of the four quadriceps muscles, is affixed...
Anterior Compartment
The quadriceps femoris, the most visible muscle of the anterior compartment, is integral for leg extension and thigh flexion. It is formed by merging four distinct muscles — the vastus lateralis, vastus medialis, vastus intermedius, and rectus femoris. The quadriceps tendon, a shared tendon of the four quadriceps muscles, is affixed...
1.4K
Muscle Contraction
90.2K
90.2K
Motor Unit Stimulation
1.4K
When the neuron of a motor unit fires an action potential, it triggers a series of events, leading to a twitch contraction in the muscle fibers. The process of excitation-contraction coupling is crucial in relaying the action potential to the muscle fibers.
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
1.4K
Muscles that Move the Thigh
786
The thigh's motion is primarily governed by muscles originating in the pelvic girdle and inserted into the femur. One crucial muscle, the iliopsoas, is a combination of the psoas major and the iliacus muscles, sharing a common insertion point on the lesser trochanter of the femur.
Three other significant muscles are the gluteus maximus, gluteus medius, and gluteus minimus. The gluteus maximus originates from the posterior surface of the ilium, sacrum, and coccyx, and the thoracolumbar...
Three other significant muscles are the gluteus maximus, gluteus medius, and gluteus minimus. The gluteus maximus originates from the posterior surface of the ilium, sacrum, and coccyx, and the thoracolumbar...
786
Excitation-Contraction Coupling in Skeletal Muscles
7.9K
Excitation-contraction coupling is a series of events that occur between generating an action potential and initiating a muscle contraction. It occurs at the triad, a structure found in skeletal muscle fibers that comprise a T-tubule and terminal cisternae of the sarcoplasmic reticulum on each side. These triads are visible in longitudinally sectioned muscle fibers. They are typically located at the A-I junction — the junction between the A and I bands of the sarcomere.
When an action...
When an action...
7.9K


