Monkey locomotion during gait transitions: How do interlimb time intervals, step sequences, and kinematics change?
Article first published online: 2 MAY 2005
Copyright © 1985 Wiley-Liss, Inc., A Wiley Company
American Journal of Physical Anthropology
Volume 66, Issue 4, pages 417–427, April 1985
How to Cite
Hurov, J. R. (1985), Monkey locomotion during gait transitions: How do interlimb time intervals, step sequences, and kinematics change?. Am. J. Phys. Anthropol., 66: 417–427. doi: 10.1002/ajpa.1330660410
- Issue published online: 2 MAY 2005
- Article first published online: 2 MAY 2005
- Manuscript Accepted: 21 SEP 1984
- Manuscript Revised: 15 SEP 1984
- Manuscript Received: 2 APR 1984
- The University of Texas Research Institute Grant. Grant Number: SRF-835
- Gait transitions;
- Interlimb coordination;
- Back motion;
- Stride length
Cine film documenting unrestrained locomotion of vervet monkeys (Cercopithecus aethiops) ranging in age from 6 to greater than 48 months was analyzed to provide information on gait transitions from walking to loping. Changes in the duration of time between reciprocal footfalls were measured to determine how alternate limb movements, which occurred during walking, were converted to synchronous limb coordination characteristic of loping. Footfall pattern changes were also determined, and walk-lope transition speeds were plotted on logarithmic coordinates, as a function of body mass.
Conversion from alternate to synchronous limb movement during vervet walk-lope transitions was effected by systematic decreases in the duration of time between successive footfalls. These decreases primarily affected contralateral limb pairs, RH-LH and RF-LF. Synchronous contralateral limb movement was considered to be mechanically advantageous because, when coupled with increased ranges of back motion, it provided a mechanism for increasing hindlimb step length.
Intraspecific scaling of walk-lope transition speed in vervets provided support for McMahon's (1975) elastic similarity principle.