Compared with healthy people, stroke patients have slower speeds when walking, limbs are not coordinated, and metabolism is increased. Most of these limitations are caused by abnormal limbs, especially dysfunction of the tendon muscle system. In the healthy population, the ankle joint produces more mechanical energy than other muscle groups, and plays an important role in the advancement and swing phase.
Decreased ankle function in stroke patients can result in inadequate propulsion during walking. To improve the hemiplegia function, Takahashi et al. from the University of North Carolina in the United States designed a neuromechanical-based tendon exoskeleton (Fig. 1) and studied the feasibility. The results were published in the Journal of Neuroengineering. And Rehabilitation in the December 2015 issue of the magazine.
The exoskeleton is made of carbon fiber material according to the user's size. The calf and the foot are hinged at the ankle joint, and the total weight is about 532.3 g. Artificial pneumatic muscles (about 26 cm long) were placed behind the calf to provide a moment of plantar flexion (the arm length was about 13.4 cm). The magnitude and timing of the exoskeleton assist depends on real-time data on the myoelectric signal of the soleus muscle and the ground reaction force (GRF) of the walking plate collection process.
The exoskeleton uses a proportional EMG propulsion control to provide a plantar flexion torque commensurate with the myotrope muscle myoelectric signal only when the support phase is greater than zero from the front and rear ground forces (Fig. 1).
Figure 1. Proportional electromyography (PMP)-powered exoskeleton: regulates the time and magnitude of exoskeleton activation based on the myoelectricity of the soleus muscle and the real-time data of the anterior and posterior ground reaction forces collected by the walking plate. The PMP control system provides a plantar flexion moment commensurate with the myoelectric activity of the soleus muscle only when the supporting limb body encounters a ground reaction force from the front. The red highlighted area represents the period of exoskeleton activation.
Vegetarians Size 00 Empty Capsule
Vegetarians Size 00 Empty Capsule,Gelatin Empty Pills Capsules Vegan,Colorful Vegan Empty Pills Capsules,Size 00 Empty Pills Capsules Vegan
Ningbo Jiangnan Capsule Co., Ltd. , https://www.jncapsule.com