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Flexion Angles of Finger Joints in Two-Finger Tip Pinching Using 3D Bone Models Constructed from X-Ray Computed Tomography (CT) Images.

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Title: Flexion Angles of Finger Joints in Two-Finger Tip Pinching Using 3D Bone Models Constructed from X-Ray Computed Tomography (CT) Images.
Authors: Shimawaki, Satoshi1 (AUTHOR), Nakamura, Yoshiaki1 (AUTHOR), Nakabayashi, Masataka1 (AUTHOR), Sugimoto, Hideharu2 (AUTHOR)
Source: Applied Bionics & Biomechanics. 9/10/2020, p1-6. 6p.
Subjects: Computed tomography, Finger joint, Bones, Thumb, Metacarpophalangeal joint, Artificial hands, Small-angle X-ray scattering, Positron emission
Abstract: The motion analysis of two-finger tip pinching using the thumb and index finger provides crucial data for designing the motion mechanism of electric prosthetic hands. The purpose of this study is to determine the joints that have high mobility during two-finger tip pinching by measuring the flexion angle of each joint. Ten Japanese men with normal hand were selected. CT images were obtained while the hands adopted the following four postures: a basic posture not pinching a cylinder, and three postures pinching wooden cylinders with different diameters (2, 10, and 30 mm). Three-dimensional bone models of the thumb and index finger were created using the CT images and used to measure the flexion angles of the joints. The flexion angles of the proximal interphalangeal and metacarpophalangeal joints of the index finger significantly decreased as the diameter of the cylinder increased. However, even when the diameter of the cylinder changed, the flexion angle of the distal interphalangeal joint of the index finger, and the flexion and rotation angles of all of the thumb joints did not change. When pinching objects of different sizes with a two-finger tip pinch, the posture of the thumb is fixed, and only the posture of the index finger changes. When designing the two-finger tip pinch motion for an electric prosthetic hand, it is sufficient to drive the joints of the index finger only. [ABSTRACT FROM AUTHOR]
Copyright of Applied Bionics & Biomechanics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 145670942
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
  Group: Ti
  Data: Flexion Angles of Finger Joints in Two-Finger Tip Pinching Using 3D Bone Models Constructed from X-Ray Computed Tomography (CT) Images.
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  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Shimawaki%2C+Satoshi%22">Shimawaki, Satoshi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Nakamura%2C+Yoshiaki%22">Nakamura, Yoshiaki</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Nakabayashi%2C+Masataka%22">Nakabayashi, Masataka</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sugimoto%2C+Hideharu%22">Sugimoto, Hideharu</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Applied+Bionics+%26+Biomechanics%22">Applied Bionics & Biomechanics</searchLink>. 9/10/2020, p1-6. 6p.
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  Data: <searchLink fieldCode="DE" term="%22Computed+tomography%22">Computed tomography</searchLink><br /><searchLink fieldCode="DE" term="%22Finger+joint%22">Finger joint</searchLink><br /><searchLink fieldCode="DE" term="%22Bones%22">Bones</searchLink><br /><searchLink fieldCode="DE" term="%22Thumb%22">Thumb</searchLink><br /><searchLink fieldCode="DE" term="%22Metacarpophalangeal+joint%22">Metacarpophalangeal joint</searchLink><br /><searchLink fieldCode="DE" term="%22Artificial+hands%22">Artificial hands</searchLink><br /><searchLink fieldCode="DE" term="%22Small-angle+X-ray+scattering%22">Small-angle X-ray scattering</searchLink><br /><searchLink fieldCode="DE" term="%22Positron+emission%22">Positron emission</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The motion analysis of two-finger tip pinching using the thumb and index finger provides crucial data for designing the motion mechanism of electric prosthetic hands. The purpose of this study is to determine the joints that have high mobility during two-finger tip pinching by measuring the flexion angle of each joint. Ten Japanese men with normal hand were selected. CT images were obtained while the hands adopted the following four postures: a basic posture not pinching a cylinder, and three postures pinching wooden cylinders with different diameters (2, 10, and 30 mm). Three-dimensional bone models of the thumb and index finger were created using the CT images and used to measure the flexion angles of the joints. The flexion angles of the proximal interphalangeal and metacarpophalangeal joints of the index finger significantly decreased as the diameter of the cylinder increased. However, even when the diameter of the cylinder changed, the flexion angle of the distal interphalangeal joint of the index finger, and the flexion and rotation angles of all of the thumb joints did not change. When pinching objects of different sizes with a two-finger tip pinch, the posture of the thumb is fixed, and only the posture of the index finger changes. When designing the two-finger tip pinch motion for an electric prosthetic hand, it is sufficient to drive the joints of the index finger only. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Applied Bionics & Biomechanics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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        Value: 10.1155/2020/8883866
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      – Code: eng
        Text: English
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        PageCount: 6
        StartPage: 1
    Subjects:
      – SubjectFull: Computed tomography
        Type: general
      – SubjectFull: Finger joint
        Type: general
      – SubjectFull: Bones
        Type: general
      – SubjectFull: Thumb
        Type: general
      – SubjectFull: Metacarpophalangeal joint
        Type: general
      – SubjectFull: Artificial hands
        Type: general
      – SubjectFull: Small-angle X-ray scattering
        Type: general
      – SubjectFull: Positron emission
        Type: general
    Titles:
      – TitleFull: Flexion Angles of Finger Joints in Two-Finger Tip Pinching Using 3D Bone Models Constructed from X-Ray Computed Tomography (CT) Images.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Shimawaki, Satoshi
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            NameFull: Nakamura, Yoshiaki
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            NameFull: Nakabayashi, Masataka
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            NameFull: Sugimoto, Hideharu
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          Dates:
            – D: 10
              M: 09
              Text: 9/10/2020
              Type: published
              Y: 2020
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              Value: 11762322
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            – TitleFull: Applied Bionics & Biomechanics
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