Asymmetric shape of distal phalanx of human finger improves precision grasping
| Autor: | Yoshinobu Obata, Yoshiko Yabuki, Shunta Togo, Yinlai Jiang, Hiroshi Yokoi, Ayane Kumagai |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Models
Anatomic 0209 industrial biotechnology Computer science Evolution Science 02 engineering and technology Article Fingers Finger Phalanges 020901 industrial engineering & automation Humans Computer vision Holding time Multidisciplinary Hand Strength integumentary system business.industry 05 social sciences 050301 education Equipment Design Robotics Phalanx Biomechanical Phenomena body regions Printing Three-Dimensional Medicine Artificial intelligence Anatomy business 0503 education |
| Zdroj: | Scientific Reports, Vol 11, Iss 1, Pp 1-10 (2021) Scientific Reports |
| ISSN: | 2045-2322 |
| Popis: | In morphology field, the functions of an asymmetric-shaped distal phalanx in human finger have only been inferred. In this study, we used an engineering approach to empirically examine the effects of the shape of distal phalanx on the ability of precision grasping. Hence, we developed artificial fingertips consisting of four parts, namely bones, nails, skin, and subcutaneous tissue, that substitute the actual human fingertips. Furthermore, we proposed a method to evaluate the grasping ability of artificial fingers. When a cylindrical object was grasped by an artificial fingertip, a pull-out experiment was conducted. Thus, the asymmetric type was found to be superior in terms of drawing force, holding time, and work of friction than the symmetric type. Our results clearly demonstrate that the asymmetric shape, particularly the mirror-reversed shape of the distal phalanx, improves the ability of precision grasping and suggests that the human distal phalanx is shaped favorably for object grasping. |
| Databáze: | OpenAIRE |
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