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Keywords: center of mass
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Journal Articles
J Exp Biol (2021) 224 (23): jeb242990.
Published: 3 December 2021
... American alligators (total length 0.46–1.27 m, body mass 0.3–5.6 kg) and examined their limb kinematics, forces, joint moments and center of mass (CoM) to test for ontogenetic shifts in posture and limb mechanics. Larger alligators typically walked with a more adducted humerus and femur and a more extended...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (14): jeb198648.
Published: 26 July 2019
... feedback conditions during split-belt locomotion with belt-speed ratios of 0.5, 1.0, 1.5 and 2.0. Measures of body balance included step width, relative duration of limb support phases, lateral bias of center of mass (CoM) and margins of static and dynamic stability. In the intact condition, static...
Journal Articles
J Exp Biol (2018) 221 (24): jeb185975.
Published: 12 December 2018
... of forelimb position on the body center of mass (BCoM) in the context of bipedalism. This study quantified the frequency of bipedalism when sprinting with versus without an obstacle at 0.8 m from the start of a sprint. Forelimb positions were quantified during bipedal running at the start of a sprint and when...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (15): jeb180687.
Published: 13 August 2018
... with a force plate at the center to measure their ground reaction forces and gait parameters. The location of their center of mass was also quantified using a force plate and bi-planar x-ray and found to be further anterior in the domestic strain. The domestic turkeys locomoted across a lower range of speeds...
Journal Articles
J Exp Biol (2018) 221 (2): jeb162917.
Published: 22 January 2018
... two models to explain this pattern using primates and felines: (1) the horizontal strut effect (in which limbs are modeled as independent struts), and (2) the linked strut model (in which limbs are modeled as linked struts with a center of mass in between). Video recordings were used to determine...
Includes: Supplementary data
Journal Articles
J Exp Biol (2015) 218 (9): 1453–1460.
Published: 1 May 2015
...Sandra Nauwelaerts; Lila Zarski; Peter Aerts; Hilary Clayton ABSTRACT Animals switch gaits according to locomotor speed. In terrestrial locomotion, gaits have been defined according to footfall patterns or differences in center of mass (COM) motion, which characterizes mechanisms that are more...
Includes: Supplementary data
Journal Articles
J Exp Biol (2014) 217 (21): 3891–3897.
Published: 1 November 2014
... loss and long-term regeneration for the first time by measuring morphology, 3D kinematics and ground reaction forces (GRFs) in the leopard gecko Eublepharis macularius . Tail autotomy resulted in a 13% anterior shift in the center of mass (CoM), which only partially recovered after full regeneration...
Journal Articles
J Exp Biol (2012) 215 (10): 1728–1739.
Published: 15 May 2012
... primate quadrupedalism, how the center of mass (COM) moves is not well understood. Here, we examined COM energy, work and power during walking, cantering and galloping in ring-tailed lemurs, Lemur catta ( N =5), over a broad speed range (0.43–2.91 m s –1 ). COM energy recoveries were substantial during...
Journal Articles
J Exp Biol (2011) 214 (9): 1546–1553.
Published: 1 May 2011
...José Iriarte-Díaz; Daniel K. Riskin; David J. Willis; Kenneth S. Breuer; Sharon M. Swartz SUMMARY The center of mass (COM) of a flying animal accelerates through space because of aerodynamic and gravitational forces. For vertebrates, changes in the position of a landmark on the body have been...
Includes: Supplementary data
Journal Articles
J Exp Biol (2009) 212 (16): 2668–2678.
Published: 15 August 2009
...Peter G. Adamczyk; Arthur D. Kuo SUMMARY Simple dynamic walking models based on the inverted pendulum predict that the human body's center of mass (COM) moves along an arc during each step,with substantial work performed to redirect the COM velocity in the step-to-step transition between arcs...
Journal Articles
J Exp Biol (2006) 209 (24): 4895–4900.
Published: 15 December 2006
...Jinger S. Gottschall; Rodger Kram SUMMARY Humans and other animals exchange gravitational potential energy (GPE) and kinetic energy (KE) of the center of mass during level walking. How effective is this energy exchange during downhill and uphill walking? Based on previous reports and our own...
Journal Articles
J Exp Biol (2004) 207 (10): 1715–1728.
Published: 15 April 2004
... this hypothesis by adding 10% body mass near the center of mass, at the pectoral girdle, or at the pelvic girdle of trotting dogs. Two force platforms in series recorded fore- and hindlimb ground reaction forces independently. Vertical and fore–aft impulses were calculated by integrating individual force–time...