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Related Concept Videos

Somatosensation01:33

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The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
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Human Hand Anatomy-Based Prosthetic Hand.

Larisa Dunai1, Martin Novak2, Carmen García Espert3

  • 1Centro de Investigación en Tecnologías Gráficas, Universitat Politècnica de València, camino de Vera s/n, 46022 Valencia, Spain.

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|December 31, 2020
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Summary
This summary is machine-generated.

This study presents a 3D-printed prosthetic hand with personalized joints for enhanced finger movement. Force sensitive resistors and surface electromyogram sensors improve grasping control and natural actuation.

Keywords:
MyWare sensorforce sensing resistorshuman hand anatomyprosthetic hand

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Area of Science:

  • Biomedical Engineering
  • Rehabilitation Technology

Background:

  • Developing advanced prosthetic hands that mimic human dexterity remains a significant challenge.
  • Existing prosthetics often lack the nuanced movement and sensory feedback required for natural interaction.

Purpose of the Study:

  • To design and develop a novel prosthetic hand with enhanced anatomical accuracy and functionality.
  • To investigate the impact of personalized joint designs on prosthetic hand mobility and grasping capabilities.
  • To integrate sensory feedback mechanisms for improved control and object manipulation.

Main Methods:

  • Utilizing 3D printing with Polylactic Acid for fabricating prosthetic hand phalanges.
  • Designing and implementing personalized prosthetic hand joints to increase finger degrees of freedom.
  • Incorporating driven wire tendons for progressive grasping with low friction.
  • Integrating Force Sensitive Resistors (FSR) for touch pressure simulation and grasping control.
  • Employing Surface Electromyogram (EMG) sensors for user-controlled grasping initiation and movement classification.

Main Results:

  • The developed prosthetic hand demonstrates a high level of movement due to personalized, high-degrees-of-freedom joints.
  • Low tendon friction facilitates smooth and progressive grasping actions.
  • Force Sensitive Resistors effectively simulate touch pressure, aiding in controlled grasping and object adaptation.
  • Surface Electromyogram sensors enable intuitive control and offer potential for classifying hand movements.
  • Soft joints proved crucial for effective object manipulation and surface adaptation.

Conclusions:

  • The novel prosthetic hand design, featuring personalized joints and integrated sensory feedback, significantly enhances dexterity and natural interaction.
  • The combination of FSR and EMG sensors allows for more nuanced and adaptive prosthetic hand control.
  • This development represents a significant advancement in creating more functional and user-friendly upper-limb prosthetics.