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相关概念视频

Bones of the Upper Limb: Ulna01:15

Bones of the Upper Limb: Ulna

The ulna and radius are parallel bones of the antebrachium or the forearm. The ulna lies medially and consists of a bony tip called the olecranon process at its proximal end. This hook-like projection articulates with the olecranon fossa of the humerus and forms the "hinged" ulnohumeral part of the elbow joint. This joint facilitates forearm extension and flexion while preventing its hyperextension. Similarly, the coronoid process, another bony projection on the proximal/anterior side of the...
Bones of the Lower Limb: Femur and Patella01:16

Bones of the Lower Limb: Femur and Patella

The femur is the body's longest and strongest bone spanning the thigh region. Its head articulates with the acetabulum of the hip bone to form the hip joint. A minor indentation on the medial side of the femoral head, called the fovea capitis, serves as the site of attachment for the ligament of the head of the femur. This weak ligament spans the femur and acetabulum and supports the hip joint. The narrowed region below the head is the neck of the femur. The inclination angle between the neck...
Bones of the Lower Limb: Tibia and Fibula01:10

Bones of the Lower Limb: Tibia and Fibula

The tibia is the main weight-bearing bone of the lower leg. It is larger than the fibula with which it is paired. The tibia is also the second longest bone in the body and is located right below the skin. The proximal end of the tibia forms the medial and the lateral condyle, which articulates with the condyles of the femur to form the knee joint. Between the articulating surfaces is the irregular elevated area known as the intercondylar eminence that serves as the inferior attachment point for...
Knee Joint01:23

Knee Joint

The knee joint is the most complicated joint in the body. It consists of three articulations– two tibiofemoral and one patellofemoral. As is characteristic of synovial joints, the knee joint has a thin articular capsule that partially surrounds this joint cavity. Additionally, several ligaments, muscles, and cartilaginous structures support the movement of the knee.
A total of seven ligaments support the knee joint. The patellar ligament, which is also attached to the quadriceps femoris group...
Ankle Joint01:10

Ankle Joint

The ankle is formed by the talocrural joint (crural = leg). It consists of the articulations between the talus bone of the foot and the distal ends of the tibia and fibula of the leg. The superior aspect of the talus bone is square-shaped and has three areas of articulation. The top of the talus articulates with the inferior tibia. This is the portion of the ankle joint that carries the body weight between the leg and foot. The sides of the talus are firmly held in position by the articulations...
Development of the Limb Synovial Joints01:07

Development of the Limb Synovial Joints

Joints form during embryonic development in conjunction with the formation and growth of the associated bones. The embryonic tissue that gives rise to all bones, cartilage, and connective tissues of the body is called mesenchyme.
The mesenchymal stem cells differentiate into chondrocytes that form the hyaline cartilage, and later the cartilaginous model of the bone. This model further transforms into a bone. This process is known as endochondral ossification.
During development, the limbs...

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相关实验视频

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Designing a Bio-responsive Robot from DNA Origami
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基于生物灵感的原木软假肢膝盖.

Siyuan Gao1,2,3, Chengxu Yang4, Hongting Chen1,3

  • 1Department of Advanced Manufacturing and Robotics, College of Engineering, Peking University, Beijing, China.

Nature communications
|December 31, 2024
PubMed
概括

这项研究介绍了一种新的软假肢膝盖,用于膝盖以上截肢者,整合了原木和生物灵感原则. 轻量级,吸震设计增强了移动性和舒适性,可能会彻底改变下肢假肢.

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Design and Fabrication of an Elastomeric Unit for Soft Modular Robots in Minimally Invasive Surgery
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Bioinspired Soft Robot with Incorporated Microelectrodes
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13:32

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科学领域:

  • 生物医学工程 生物医学工程
  • 机器人技术 机器人技术 机器人技术
  • 康复技术 康复技术 康复技术

背景情况:

  • 目前的假膝盖很难平衡用户的行走需求和舒适度要求,例如轻量设计和减震能力.
  • 柔软的材料提供舒适性,但缺乏结构完整性,以实现有效的假肢膝盖功能,特别是在承重和形态计算方面.
  • 现有的解决方案往往无法为腿截肢患者提供以用户为中心,生物体验和轻量级的体验.

研究的目的:

  • 开发一种创新的柔软假肢膝盖,用于腿外截肢患者,以解决当前设计的局限性.
  • 整合原木技术和生物灵感的承重原理,以克服软机器人假肢灵活性方面的挑战.
  • 为了实现轻量级,紧,经济高效,易于制造的假膝盖,以提高用户的舒适性和行走能力.

主要方法:

  • 整合了原木工程原理与生物灵感的承重机制,以创建一种新的软假肢膝盖结构.
  • 开发一个使用软材料的假膝盖,以提高舒适度,同时确保足够的结构完整性以承载重量.
  • 制造了一种轻量级和紧的假肢膝盖原型,旨在简单组装和低成本生产.

主要成果:

  • 柔软的假膝盖成功支超过75公斤,展示了强大的承重能力.
  • 该设计表现出生物模拟多中心屈曲和优异的冲击吸收,减少了11.5%至17.3%的冲击力.
  • 实验验证证了假膝盖能够积极协助截肢者在各种地形上,包括坡道,楼梯和障碍物,进行导航.

结论:

  • 开发的柔软假肢膝盖有效地将舒适性与功能性能的功能性结合起来.
  • 原创和生物灵感原则的创新整合为轻量级,吸震和以用户为中心的假肢设计提供了有前途的解决方案.
  • 这项研究可能预示着重大进展,可能导致下肢假肢技术领域的范式转变.