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Updated: Jul 10, 2026

A Flexible Wearable Supernumerary Robotic Limb for Chronic Stroke Patients
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New multifunctional prosthetic arm and hand systems.

R Weir1, M Mitchell, S Clark

  • 1Rehabilitation Institute of Chicago, Chicago, IL 60611, USA. rweir@northwestern.edu

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
|November 16, 2007
PubMed
Summary

Researchers developed a novel 18 degrees of freedom (DOF) robotic hand with integrated actuators. This advanced prosthetic hand offers the strength of a 50% male while maintaining a form factor suitable for 50% of women.

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Area of Science:

  • Robotics
  • Biomechanical Engineering
  • Human-Computer Interaction

Background:

  • Traditional prosthetic hands often compromise on dexterity or strength.
  • Actuator integration within the hand's body presents significant design challenges.
  • Sizing prosthetic devices for diverse user populations, such as 50% of women, requires specific form factors.

Purpose of the Study:

  • To design and develop a novel anthropomorphic robotic hand with 18 degrees of freedom (DOF).
  • To integrate all actuators within the hand's internal structure, reducing external bulk.
  • To achieve a hand design that balances a form factor suitable for 50% of women with the strength capabilities of a 50% male.

Main Methods:

  • Utilized advanced CAD modeling for internal component arrangement.
  • Employed high-torque, compact actuators for joint actuation.
  • Focused on ergonomic design principles for a 50% female hand size.
  • Performed strength testing to quantify force output.

Main Results:

  • Successfully designed and prototyped a hand with 18 DOF and fully integrated actuators.
  • The hand's dimensions are optimized for a 50% female anthropometric profile.
  • Demonstrated strength capabilities comparable to a 50% male population.

Conclusions:

  • The developed robotic hand represents a significant advancement in prosthetic technology.
  • Achieved a unique combination of compact design, dexterity, and strength.
  • Offers a promising solution for users seeking a functional and aesthetically appropriate prosthetic hand.