A Method to Estimate the Oblique Arch Folding Axis for Thumb Assistive Devices

Visakha K. Nanayakkara; Nantachai Sornkaran; Hasitha Wegiriya; Nikolaos Vitzilaios; Demetrios Venetsanos; Nicolas Rojas; M. Necip Sahinkaya; Thrishantha Nanayakkara

doi:10.1007/978-3-030-23807-0_3

A Method to Estimate the Oblique Arch Folding Axis for Thumb Assistive Devices

Visakha K. Nanayakkara, Nantachai Sornkaran, Hasitha Wegiriya, Nikolaos Vitzilaios, Demetrios Venetsanos, Nicolas Rojas, M. Necip Sahinkaya, Thrishantha Nanayakkara

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

People who use the thumb in repetitive manipulation tasks are likely to develop thumb related impairments from excessive loading at the base joints of the thumb. Biologically informed wearable robotic assistive mechanisms can provide viable solutions to prevent occurring such injuries. This paper tests the hypothesis that an external assistive force at the metacarpophalangeal joint will be most effective when applied perpendicular to the palm folding axis in terms of maximizing the contribution at the thumb-tip as well as minimizing the projections on the vulnerable base joints of the thumb. Experiments conducted using human subjects validated the predictions made by a simplified kinematic model of the thumb that includes a foldable palm, showing that: (1) the palm folding angle varies from 71. 5 ^∘ to 75. 3 ^∘ (from the radial axis in the coronal plane) for the four thumb-finger pairs and (2) the most effective assistive force direction (from the ulnar axis in the coronal plane) at the MCP joint is in the range 0 ^∘< ψ< 30 ^∘ for the four thumb-finger pairs. These findings provide design guidelines for hand assistive mechanisms to maximize the efficacy of thumb external assistance.

Original language	English
Title of host publication	Towards Autonomous Robotic Systems
Subtitle of host publication	20th Annual Conference, TAROS 2019, Proceedings, Part 1
Editors	Kaspar Althoefer, Jelizaveta Konstantinova, Ketao Zhang
Publisher	Springer, Cham
Pages	28-40
Number of pages	13
Volume	11649
ISBN (Electronic)	9783030238070
ISBN (Print)	9783030238063
DOIs	https://doi.org/10.1007/978-3-030-23807-0_3
Publication status	Published - 29 Jun 2019
Externally published	Yes
Event	20th Annual Conference on Towards Autonomous Robotic Systems - London, United Kingdom Duration: 3 Jul 2019 → 5 Jul 2019 Conference number: 20

Publication series

Name	Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume	11649 LNAI
ISSN (Print)	0302-9743
ISSN (Electronic)	1611-3349

Conference

Conference	20th Annual Conference on Towards Autonomous Robotic Systems
Abbreviated title	TAROS 2019
Country/Territory	United Kingdom
City	London
Period	3/07/19 → 5/07/19

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1007/978-3-030-23807-0_3Licence: Unspecified

Cite this

Nanayakkara, V. K., Sornkaran, N., Wegiriya, H., Vitzilaios, N., Venetsanos, D., Rojas, N., Sahinkaya, M. N., & Nanayakkara, T. (2019). A Method to Estimate the Oblique Arch Folding Axis for Thumb Assistive Devices. In K. Althoefer, J. Konstantinova, & K. Zhang (Eds.), Towards Autonomous Robotic Systems : 20th Annual Conference, TAROS 2019, Proceedings, Part 1 (Vol. 11649, pp. 28-40). (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 11649 LNAI). Springer, Cham. https://doi.org/10.1007/978-3-030-23807-0_3

Nanayakkara, Visakha K. ; Sornkaran, Nantachai ; Wegiriya, Hasitha et al. / A Method to Estimate the Oblique Arch Folding Axis for Thumb Assistive Devices. Towards Autonomous Robotic Systems : 20th Annual Conference, TAROS 2019, Proceedings, Part 1. editor / Kaspar Althoefer ; Jelizaveta Konstantinova ; Ketao Zhang. Vol. 11649 Springer, Cham, 2019. pp. 28-40 (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)).

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title = "A Method to Estimate the Oblique Arch Folding Axis for Thumb Assistive Devices",

abstract = "People who use the thumb in repetitive manipulation tasks are likely to develop thumb related impairments from excessive loading at the base joints of the thumb. Biologically informed wearable robotic assistive mechanisms can provide viable solutions to prevent occurring such injuries. This paper tests the hypothesis that an external assistive force at the metacarpophalangeal joint will be most effective when applied perpendicular to the palm folding axis in terms of maximizing the contribution at the thumb-tip as well as minimizing the projections on the vulnerable base joints of the thumb. Experiments conducted using human subjects validated the predictions made by a simplified kinematic model of the thumb that includes a foldable palm, showing that: (1) the palm folding angle varies from 71. 5 ∘ to 75. 3 ∘ (from the radial axis in the coronal plane) for the four thumb-finger pairs and (2) the most effective assistive force direction (from the ulnar axis in the coronal plane) at the MCP joint is in the range 0 ∘< ψ< 30 ∘ for the four thumb-finger pairs. These findings provide design guidelines for hand assistive mechanisms to maximize the efficacy of thumb external assistance.",

keywords = "Foldable palm, Metacarpophalangeal joint, Thumb assistance, Thumb kinematics",

author = "Nanayakkara, {Visakha K.} and Nantachai Sornkaran and Hasitha Wegiriya and Nikolaos Vitzilaios and Demetrios Venetsanos and Nicolas Rojas and Sahinkaya, {M. Necip} and Thrishantha Nanayakkara",

note = "Publisher Copyright: {\textcopyright} Springer Nature Switzerland AG 2019. Copyright: Copyright 2019 Elsevier B.V., All rights reserved.; 20th Annual Conference on Towards Autonomous Robotic Systems, TAROS 2019 ; Conference date: 03-07-2019 Through 05-07-2019",

year = "2019",

month = jun,

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doi = "10.1007/978-3-030-23807-0_3",

language = "English",

isbn = "9783030238063",

volume = "11649",

series = "Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)",

publisher = "Springer, Cham",

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editor = "Kaspar Althoefer and Jelizaveta Konstantinova and Ketao Zhang",

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Nanayakkara, VK, Sornkaran, N, Wegiriya, H, Vitzilaios, N, Venetsanos, D, Rojas, N, Sahinkaya, MN & Nanayakkara, T 2019, A Method to Estimate the Oblique Arch Folding Axis for Thumb Assistive Devices. in K Althoefer, J Konstantinova & K Zhang (eds), Towards Autonomous Robotic Systems : 20th Annual Conference, TAROS 2019, Proceedings, Part 1. vol. 11649, Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), vol. 11649 LNAI, Springer, Cham, pp. 28-40, 20th Annual Conference on Towards Autonomous Robotic Systems, London, United Kingdom, 3/07/19. https://doi.org/10.1007/978-3-030-23807-0_3

A Method to Estimate the Oblique Arch Folding Axis for Thumb Assistive Devices. / Nanayakkara, Visakha K.; Sornkaran, Nantachai; Wegiriya, Hasitha et al.

Towards Autonomous Robotic Systems : 20th Annual Conference, TAROS 2019, Proceedings, Part 1. ed. / Kaspar Althoefer; Jelizaveta Konstantinova; Ketao Zhang. Vol. 11649 Springer, Cham, 2019. p. 28-40 (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 11649 LNAI).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - A Method to Estimate the Oblique Arch Folding Axis for Thumb Assistive Devices

AU - Nanayakkara, Visakha K.

AU - Sornkaran, Nantachai

AU - Wegiriya, Hasitha

AU - Vitzilaios, Nikolaos

AU - Venetsanos, Demetrios

AU - Rojas, Nicolas

AU - Sahinkaya, M. Necip

AU - Nanayakkara, Thrishantha

N1 - Conference code: 20

PY - 2019/6/29

Y1 - 2019/6/29

N2 - People who use the thumb in repetitive manipulation tasks are likely to develop thumb related impairments from excessive loading at the base joints of the thumb. Biologically informed wearable robotic assistive mechanisms can provide viable solutions to prevent occurring such injuries. This paper tests the hypothesis that an external assistive force at the metacarpophalangeal joint will be most effective when applied perpendicular to the palm folding axis in terms of maximizing the contribution at the thumb-tip as well as minimizing the projections on the vulnerable base joints of the thumb. Experiments conducted using human subjects validated the predictions made by a simplified kinematic model of the thumb that includes a foldable palm, showing that: (1) the palm folding angle varies from 71. 5 ∘ to 75. 3 ∘ (from the radial axis in the coronal plane) for the four thumb-finger pairs and (2) the most effective assistive force direction (from the ulnar axis in the coronal plane) at the MCP joint is in the range 0 ∘< ψ< 30 ∘ for the four thumb-finger pairs. These findings provide design guidelines for hand assistive mechanisms to maximize the efficacy of thumb external assistance.

AB - People who use the thumb in repetitive manipulation tasks are likely to develop thumb related impairments from excessive loading at the base joints of the thumb. Biologically informed wearable robotic assistive mechanisms can provide viable solutions to prevent occurring such injuries. This paper tests the hypothesis that an external assistive force at the metacarpophalangeal joint will be most effective when applied perpendicular to the palm folding axis in terms of maximizing the contribution at the thumb-tip as well as minimizing the projections on the vulnerable base joints of the thumb. Experiments conducted using human subjects validated the predictions made by a simplified kinematic model of the thumb that includes a foldable palm, showing that: (1) the palm folding angle varies from 71. 5 ∘ to 75. 3 ∘ (from the radial axis in the coronal plane) for the four thumb-finger pairs and (2) the most effective assistive force direction (from the ulnar axis in the coronal plane) at the MCP joint is in the range 0 ∘< ψ< 30 ∘ for the four thumb-finger pairs. These findings provide design guidelines for hand assistive mechanisms to maximize the efficacy of thumb external assistance.

KW - Foldable palm

KW - Metacarpophalangeal joint

KW - Thumb assistance

KW - Thumb kinematics

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UR - https://www.springer.com/gb/book/9783030238063

U2 - 10.1007/978-3-030-23807-0_3

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AN - SCOPUS:85068960389

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T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)

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Nanayakkara VK, Sornkaran N, Wegiriya H, Vitzilaios N, Venetsanos D, Rojas N et al. A Method to Estimate the Oblique Arch Folding Axis for Thumb Assistive Devices. In Althoefer K, Konstantinova J, Zhang K, editors, Towards Autonomous Robotic Systems : 20th Annual Conference, TAROS 2019, Proceedings, Part 1. Vol. 11649. Springer, Cham. 2019. p. 28-40. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)). Epub 2019 Jun 28. doi: 10.1007/978-3-030-23807-0_3

A Method to Estimate the Oblique Arch Folding Axis for Thumb Assistive Devices

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