|
| |
|
|
|
|
||||
| Home Help Feedback Subscriptions Archive Search Table of Contents | ||||
Journal of Experimental Biology, Vol 193, Issue 1 285-305, Copyright © 1994 by Company of Biologists
JOURNAL ARTICLES |
M Ashley-Ross
The kinematics of the hindlimb during terrestrial treadmill locomotion in Dicamptodon tenebrosus were compared between larval and metamorphosed individuals at different speeds. Coordinates of marker points on the salamander's midline, pelvic girdle and left hindlimb were digitized from high-speed videos (200 fields s-1). These yielded kinematic variables describing trunk flexion, pelvic girdle rotation, femoral protraction/retraction and knee flexion/extension. A three-way analysis of variance tested for mean differences among individuals, speeds and metamorphic stages for each variable. No significant overall effects of metamorphosis were found, although several variables showed significant stage x individual effects. Multivariate analyses revealed that the variance in kinematics of the larvae was significantly greater than that of the metamorphosed salamanders. Several variables showed significant speed effects or strong trends, among them stride length (increases with speed), cycle duration (decreases), contact interval (decreases) and phase variables describing the relative timing between minimum/maximum angles and the beginning of stance/swing phase. Such changes with speed are consistent with those shown for diverse arthropods and tetrapods and suggest that changes in stride length and timing events during a stride represent a general mechanism for effecting an increase in locomotor speed.
This article has been cited by other articles:
|
|
 |
|
  M. T. Butcher, N. R. Espinoza, S. R. Cirilo, and R. W. Blob In vivo strains in the femur of river cooter turtles (Pseudemys concinna) during terrestrial locomotion: tests of force-platform models of loading mechanics J. Exp. Biol., August 1, 2008; 211(15): 2397 - 2407. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. M. Reilly, J. S. Willey, A. R. Biknevicius, and R. W. Blob Hindlimb function in the alligator: integrating movements, motor patterns, ground reaction forces and bone strain of terrestrial locomotion J. Exp. Biol., March 15, 2005; 208(6): 993 - 1009. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. A. Ashley-Ross and B. F. Bechtel Kinematics of the transition between aquatic and terrestrial locomotion in the newt Taricha torosa J. Exp. Biol., February 1, 2004; 207(3): 461 - 474. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 D. J. Irschick Evolutionary Approaches for Studying Functional Morphology: Examples from Studies of Performance Capacity Integr. Comp. Biol., April 1, 2002; 42(2): 278 - 290. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
F. E. Nelson and B. C. Jayne The effects of speed on the in vivo activity and length of a limb muscle during the locomotion of the iguanian lizard Dipsosaurus dorsalis J. Exp. Biol., March 12, 2002; 204(20): 3507 - 3522. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. Jayne and D. Irschick Effects of incline and speed on the three-dimensional hindlimb kinematics of a generalized iguanian lizard (Dipsosaurus dorsalis) J. Exp. Biol., January 1, 1999; 202(2): 143 - 159. [Abstract] [PDF]
|
|
|
|
 |
|
 M. A. Ashley-Ross and G. V. Lauder Motor Patterns and Kinematics During Backward Walking in the Pacific Giant Salamander: Evidence for Novel Motor Output J Neurophysiol, December 1, 1997; 78(6): 3047 - 3060. [Abstract] [Full Text] [PDF]
|
|
