A three-dimensional kinematic analysis of bipedal walking in a white-handed gibbon (Hylobates lar) on a horizontal pole and flat surface

Fujiwara, Takafumi; Ito, Kohta; Shitara, Tetsuya et al.

Primates, 2025

Number of Access:338（2025-08-17 01:55 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/100327

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Title
A three-dimensional kinematic analysis of bipedal walking in a white-handed gibbon (Hylobates lar) on a horizontal pole and flat surface
Creator
CreatorName
Fujiwara, Takafumi
CreatorName
Ito, Kohta
NRID
1000070982841 1000070982841
researchmap permalink
shitara_tetsuya shitara_tetsuya
CreatorName
Shitara, Tetsuya
NRID
1000050217808 1000050217808
researchmap permalink
read0014276 read0014276
Scopus Author ID
35413780600 35413780600
CreatorName
Nakano, Yoshihiko
Subject
Gibbon
Bipedal walking
Pole and flat condition
Joint angle
Step width
Description
The version of record of this article, first published in Primates, is available online at Publisher’s website: https://doi.org/10.1007/s10329-024-01177-x.
Abstract
Gibbons, a type of lesser ape, are brachiators but also walk bipedally and without forelimb assistance, not only on the ground but also on tree branches. The arboreal bipedal walking strategy of the gibbons has been studied in previous studies in relation to two-dimensional (2D) kinematic analysis. However, because tree branches and the ground differ greatly in width, leading to a constrained foot contact point on the tree branches, gibbons must adjust their 3D joint motions of trunk and hindlimb on the tree branches. Furthermore, these motor adjustments could help minimize the center of mass (CoM) mediolateral displacement. This study investigated the kinematic adjustment mechanism necessary to enable a gibbon to walk bipedally on an arboreal-like substrate using 3D measurements. Trials were recorded with eight video cameras that were placed around the substrate. The CoM position on the body, the Cardan angles of the hindlimb joints and trunk, and spatiotemporal parameters were calculated. Asymmetry of thorax, pelvis, trunk, and left and right hindlimb joint motion was observed in the pole and flat conditions. In the pole condition, the narrower step width and the smaller range of motion of the mediolateral CoM displacement were observed with increased hip adduction and knee eversion angles. These kinematic adjustments might place the knee and foot directly under the body during the single support phase, producing a reduced step width and the amount of the mediolateral CoM displacement of a gibbon.
Publisher
Springer Science and Business Media LLC
Source Title
Primates
Date of Issued
2025-01-15
Language
English
Handle URL
https://hdl.handle.net/11094/100327
PISSN
00328332
eISSN
16107365
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1007/s10329-024-01177-x
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution 4.0 International License.
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article