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Keywords: mechanics
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Journal Articles
J Exp Biol (2020) 223 (19): jeb218982.
Published: 6 October 2020
...Alberto E. Minetti; Fabrizio Rapuzzi; Cristine Lima Alberton; Gaspare Pavei ABSTRACT The aim of this study was to investigate the mechanical and metabolic reasons for the spontaneous gait/speed choice when ascending a short flight of stairs, where walking on every step or running on every other...
Journal Articles
J Exp Biol (2018) 221 (1): jeb163360.
Published: 9 January 2018
...Brett R. Aiello; Adam R. Hardy; Chery Cherian; Aaron M. Olsen; Sihyun E. Ahn; Melina E. Hale; Mark W. Westneat ABSTRACT The functional capabilities of flexible, propulsive appendages are directly influenced by their mechanical properties. The fins of fishes have undergone extraordinary evolutionary...
Includes: Supplementary data
Journal Articles
J Exp Biol (2016) 219 (22): 3626–3634.
Published: 15 November 2016
... their body mass, over long distances up and down the steep mountain footpaths. In Africa, women transport their loads economically thanks to an energy-saving gait adaptation. We hypothesized that the Nepalese porters may have developed a corresponding mechanism. To investigate this proposition, we measured...
Journal Articles
J Exp Biol (2015) 218 (16): 2551–2562.
Published: 1 August 2015
... . 10.1126/science.7701330 Ritt , J. T. , Andermann , M. L. and Moore , C. I. ( 2008 ). Embodied information processing: vibrissa mechanics and texture features shape micromotions in actively sensing rats . Neuron   57 , 599 - 613 . 10.1016/j.neuron.2007.12.024 Schroeder , C...
Includes: Supplementary data
Journal Articles
J Exp Biol (2013) 216 (13): 2501–2514.
Published: 1 July 2013
... mechanics. Study of these fish has resulted in models that illuminate the principles behind their electrosensory system and unique swimming abilities. These models have uncovered the mechanisms by which knifefish generate thrust for swimming forward and backward, hovering, and heaving dorsally using...
Journal Articles
J Exp Biol (2013) 216 (12): 2257–2265.
Published: 15 June 2013
... coordination parameters are dissociated. Consequently, transitions are the periods where it is possible to detect and identify those parameters involved in the mechanical or neural control of locomotion. We studied interlimb coordination using a sequential method (antero-posterior sequence) to measure...
Includes: Supplementary data
Journal Articles
J Exp Biol (2012) 215 (18): 3293–3308.
Published: 15 September 2012
...Chen Li; S. Tonia Hsieh; Daniel I. Goldman SUMMARY A diversity of animals that run on solid, level, flat, non-slip surfaces appear to bounce on their legs; elastic elements in the limbs can store and return energy during each step. The mechanics and energetics of running in natural terrain...
Includes: Multimedia, Supplementary data
Journal Articles
J Exp Biol (2011) 214 (24): 4151–4159.
Published: 15 December 2011
... and environments. Diminished performance could increase susceptibility to predation, yet the mechanism(s) by which gravidity and pregnancy affect locomotion remains largely unexplored. Here we demonstrate that morphology, hydrodynamics and kinematics were altered during pregnancy, providing a mechanism...
Journal Articles
J Exp Biol (2011) 214 (17): 2896–2902.
Published: 1 September 2011
... to two different photoperiod regimes at a room temperature of 19–21°C: long photoperiod (control, 16 h:8 h light:dark, N =8) and short photoperiod (torpor, 8 h:16 h light:dark, N =8). After 14 weeks, muscle mechanics were analyzed in each group, examining both extensor digitorum longus (EDL) muscle...
Journal Articles
J Exp Biol (2010) 213 (7): 1079–1091.
Published: 1 April 2010
... for correspondence ( joseph.thompson@fandm.edu ) 11 12 2009 © 2010. 2010 cephalopod jet locomotion mechanics obliquely striated muscle hydrodynamics ontogeny muscle ultrastructure Muscle fibers can be modified to produce a broad continuum of contractile properties...
Journal Articles
J Exp Biol (2008) 211 (23): 3677–3681.
Published: 1 December 2008
...Laura Farran; A. Roland Ennos; Stephen J. Eichhorn SUMMARY Fingernails are a characteristic anatomical feature of primates and their function is dictated by the environment in which they are utilised. The present study examined the mechanical properties of human fingernails as a function...
Journal Articles
J Exp Biol (2008) 211 (20): 3205–3213.
Published: 15 October 2008
... to breath, yet the dorsoventral oscillations used during locomotion may be compromised by the lateral flexibility evident in the fetus. The unique fetal position of dolphins, coupled with their need to swim at birth, places conflicting mechanical demands on the tailstock. Our previous research demonstrated...
Journal Articles
J Exp Biol (2008) 211 (1): 86–91.
Published: 1 January 2008
... for correspondence (e-mail: anthony.herrel@ua.ac.be ) 24 10 2007 © The Company of Biologists Limited 2008 2008 modeling bite force bats muscle mechanics Bats are one of the most diverse groups of mammals( Kunz and Pierson, 1994 ; Huston, 1994 ; Simmons, 2005 ) including species...
Journal Articles
J Exp Biol (2006) 209 (23): 4724–4731.
Published: 1 December 2006
.... * Author for correspondence (e-mail: snoren@biology.ucsc.edu ) 2 10 2006 © The Company of Biologists Limited 2006 2006 cetacean odontocete dolphin calf ontogeny swimming performance mechanics kinematics Tursiops truncatus Swimming performance undoubtedly changes...
Journal Articles
J Exp Biol (2006) 209 (1): 171–187.
Published: 1 January 2006
... dynamics in the perturbed step. This will yield insight into how animals integrate mechanics and control to maintain dynamic stability in the face of real-world perturbations. Our results show that, despite altered body dynamics and a great deal of variability in the response, guinea fowl are quite...
Includes: Multimedia, Supplementary data
Journal Articles
J Exp Biol (2005) 208 (14): 2625–2631.
Published: 15 July 2005
..., A. A. ( 1989 ). Scaling body support in mammals: limb posture and muscle mechanics. Science 245 , 45 -48. Biewener, A. A. ( 1993 ). Safety factors in bone strength. Calcif. Tiss. Int. 53 , S68 -S74. Biewener, A. A., Farley, C. T., Roberts, T. J. and Temaner,M. ( 2004 ). Muscle mechanical...
Journal Articles
J Exp Biol (2004) 207 (5): 735–741.
Published: 15 February 2004
... behaviour. They probably act to increase the nail's bending strength, and as they wrap around the edge of the nail, they also help prevent cracks from forming. These results cast light on the mechanical behaviour and care of fingernails. The anisotropy is somewhat reduced by the thin isotropic dorsal...
Journal Articles
J Exp Biol (2003) 206 (17): 2967–2978.
Published: 1 September 2003
... in mechanical energy of the body, did not measure the work done by one leg against the other during DC ( Alexander,1980 ) and therefore makes an error in deficit. On the other hand,the `hybrid energy/work' method used by Alexander and Jayes( 1978 ) measured work as the product of a force multiplied...
Journal Articles
J Exp Biol (2002) 205 (18): 2803–2823.
Published: 15 September 2002
...Devin L. Jindrich; Robert J. Full SUMMARY To stabilize locomotion, animals must generate forces appropriate to overcome the effects of perturbations and to maintain a desired speed or direction of movement. We studied the stabilizing mechanism employed by rapidly running insects by using a novel...
Journal Articles
J Exp Biol (2002) 205 (15): 2153–2160.
Published: 1 August 2002
... produced in vivo should include a consideration of the sustainability of the effort. This work was funded by a Wellcome Research Travel Grant (to G.N.A.) and by the NIH (grant AR39318 to R.L.M.). References Askew, G. N., Ellington, C. P. and Marsh, R. L. ( 2001 ). The mechanical power...