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Journal of Experimental Biology, Vol 203, Issue 18 2833-2849, Copyright © 2000 by Company of Biologists
JOURNAL ARTICLES |
JJ Meyers and KC Nishikawa
Physiology and Functional Morphology Group, Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011-5640, USA. jjm@dana.ucc.nau.edu
The goal of this study was to investigate the function of the hyolingual muscles used during tongue protraction in iguanian lizards. High-speed videography and nerve-transection techniques were used to study prey capture in the iguanid Sceloporus undulatus, the agamid Pseudoptrapelus sinaitus and the chameleonid Chamaeleo jacksonii. Denervation of the mandibulohyoideus muscle slips had an effect only on P. sinaitus and C. jacksonii, in which tongue protrusion or projection distance was reduced. In C. jacksonii, denervation of the M. mandibulohyoideus completely prevented little hyoid protraction. Denervation of the M. verticalis had no effect on S. undulatus, but reduced tongue protrusion distance in P. sinaitus. Denervation of the accelerator muscle in C. jacksonii inhibited tongue projection completely. The function of the M. mandibulohyoideus and M. verticalis has become increasingly specialized in P. sinaitus and especially in C. jacksonii to allow greater tongue protrusion. The combined results of these treatments suggest that these three groups represent transitional forms, both morphologically and functionally, in the development of a projectile tongue.
This article has been cited by other articles:
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  V. Schaerlaeken, A. Herrel, and J. J. Meyers Modulation, individual variation and the role of lingual sensory afferents in the control of prey transport in the lizard Pogona vitticeps J. Exp. Biol., July 1, 2008; 211(13): 2071 - 2078. [Abstract] [Full Text] [PDF]
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A. K. Lappin, J. A. Monroy, J. Q. Pilarski, E. D. Zepnewski, D. J. Pierotti, and K. C. Nishikawa Storage and recovery of elastic potential energy powers ballistic prey capture in toads J. Exp. Biol., July 1, 2006; 209(13): 2535 - 2553. [Abstract] [Full Text] [PDF]
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J. J. Meyers and A. Herrel Prey capture kinematics of ant-eating lizards J. Exp. Biol., January 1, 2005; 208(1): 113 - 127. [Abstract] [Full Text] [PDF]
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M. Ott, J. Ostheim, and W. C. Sherbrooke Prey snapping and visual distance estimation in Texas horned lizards, Phrynosoma cornutum J. Exp. Biol., September 1, 2004; 207(17): 3067 - 3072. [Abstract] [Full Text] [PDF]
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A. Herrel, J. J. Meyers, J.-P. Timmermans, and K. C. Nishikawa Supercontracting muscle: producing tension over extreme muscle lengths J. Exp. Biol., August 1, 2002; 205(15): 2167 - 2173. [Abstract] [Full Text] [PDF]
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 A. Herrel, J. J. Meyers, K. C. Nishikawa, and F. D. Vree The Evolution of Feeding Motor Patterns in Lizards: Modulatory Complexity and Possible Constraints Integr. Comp. Biol., December 1, 2001; 41(6): 1311 - 1320. [Abstract] [Full Text] [PDF]
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A. Herrel, J. J. Meyers, P. Aerts, and K. C. Nishikawa Functional implications of supercontracting muscle in the chameleon tongue retractors J. Exp. Biol., January 11, 2001; 204(21): 3621 - 3627. [Abstract] [Full Text] [PDF]
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A Herrel, J. Meyers, P Aerts, and K. Nishikawa The mechanics of prey prehension in chameleons J. Exp. Biol., January 11, 2000; 203(21): 3255 - 3263. [Abstract] [PDF]
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