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Related Concept Videos

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The human circulatory system, a marvel of biological engineering, is a complex network of vessels that transport blood throughout the body. Among these, the veins responsible for carrying blood from the upper limbs are divided into two categories: deep and superficial.
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The upper limb consists of the arm, forearm, wrist, and hand bones. The humerus is the single bone of the upper arm region. Proximally, it has a large, spherical, smooth head that articulates with the glenoid cavity of the scapula to form the glenohumeral or shoulder joint. The margin of the head is the anatomical neck, a residual epiphyseal plate. Laterally it extends to form bony projections called the greater tubercle and the lesser tubercle. Next to the tubercles is the surgical neck, a...
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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...
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The radius is longer of the two bones that make up the human antebrachium or forearm. At the proximal end, the radius articulates with the capitulum of the humerus and the radial notch of the ulna to form the elbow joint. At the distal end, the radius articulates with the ulna via the ulnar notch, forming the distal radioulnar joint. Distally, the radius also attaches to the carpal wrist bones (scaphoid and lunate) to form the radiocarpal joint.
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When dealing with a cable that is fixed to two supports and subjected to uniform loading, it is crucial to determine the maximum tension in the cable. This process can be broken down into several key steps, as outlined below:
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Related Experiment Video

Updated: Feb 6, 2026

Author Spotlight: Enhancing Upper Limb Rehabilitation in Stroke Patients Through Advanced Robotic and Neuromodulation Technologies
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Design on the Bowden Cable-Driven Upper Limb Soft Exoskeleton.

Wei Wei1, Zhicheng Qu1, Wei Wang1

  • 1College of Physics, Optoeletronics and Energy and Collaborative Innovation, Soochow University, Suzhou 215000, China.

Applied Bionics and Biomechanics
|August 18, 2018
PubMed
Summary
This summary is machine-generated.

This study optimized a soft exoskeleton for hemiplegic patients, reducing harmful interaction forces. Increasing bearing points and moving them from the elbow significantly improved comfort and safety during rehabilitation.

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Area of Science:

  • Biomedical Engineering
  • Rehabilitation Robotics
  • Human Biomechanics

Background:

  • Upper limb soft exoskeletons aid hemiplegic patients in daily activities.
  • Minimizing man-machine interaction force is crucial to prevent joint damage and discomfort.

Purpose of the Study:

  • To propose and optimize a soft exoskeleton structure for upper limb rehabilitation.
  • To minimize man-machine interaction forces through structural optimization.

Main Methods:

  • Developed a Bowden cable-based soft driving structure.
  • Created a human arm model for motion simulation in ADAMS.
  • Simulated elbow movements to analyze force bearing point effects.
  • Utilized mathematical modeling for shoulder skeletal system movement and man-machine contact force sensors.

Main Results:

  • Structural optimization successfully reduced man-machine interaction forces.
  • Increasing the number of force bearing points decreased interaction force.
  • Positioning bearing force points away from the elbow further reduced interaction force.

Conclusions:

  • The proposed soft exoskeleton design effectively minimizes harmful interaction forces.
  • Optimizing the number and placement of bearing points enhances patient safety and comfort.
  • This approach offers a promising solution for upper limb rehabilitation exoskeletons.