Abstract
Cranial kinesis in sparrows refers to the rotation of the upper jaw around its kinetic joint with the braincase. Avian jaw mechanics may involve the coupled motions of upper and lower jaws, in which the postorbital ligament transfers forces from the lower jaw, through the quadrate, pterygoid, and jugal bones, to the upper jaw. Alternatively, jaw motions may be uncoupled, with the upper jaw moving independently of the lower jaw. We tested hypotheses of cranial kinesis through the use of quantitative computer models. We present a biomechanical model of avian jaw kinetics that predicts the motions of the jaws under assumptions of both a coupled and an uncoupled mechanism. In addition, the model predicts jaw motions under conditions of force transfer by either the jugal or the pterygoid bones. Thus four alternative models may be tested using the proposed model (coupled jugal, coupled pterygoid, uncoupled jugal, uncoupled pterygoid). All models are based on the mechanics of four-bar linkages and lever systems and use morphometric data on cranial structure as the basis for predicting cranial movements. Predictions of cranial motions are tested by comparison to kinematics of white-throated sparrows (Zonotrichia albicollis) during sing...Continue Reading
References
Jan 1, 1987·Nature·S Nowicki
Jul 1, 1980·The Journal of Comparative Neurology·J M Wild, H P Zeigler
Nov 1, 1962·Journal of Morphology·T H FRAZZETTA
Aug 1, 1992·Journal of Morphology·E M S J Van Gennip, H Berkhoudt
Sep 1, 1990·Journal of Morphology·Mark W Westneat
Citations
Nov 22, 1997·Journal of Neurobiology·J M Wild
Aug 10, 2018·ELife·Martha M MuñozS N Patek
Feb 13, 2002·Proceedings. Biological Sciences·C Darrin Hulsey, Peter C Wainwright
Jun 26, 1999·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·R A SuthersC Pytte
Jul 2, 2019·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Ian N CostCasey M Holliday
Sep 1, 2016·Journal of Morphology·Aaron M Olsen, Mark W Westneat
Dec 31, 2015·Royal Society Open Science·Stephan Lautenschlager
Sep 25, 2015·PeerJ·Christophe HendrickxOctávio Mateus
Dec 15, 2017·The Journal of Experimental Biology·Aaron M OlsenElizabeth L Brainerd
Nov 7, 2019·The Journal of Experimental Biology·Aaron M Olsen
Oct 9, 2007·The Journal of Experimental Biology·S N PatekA P Summers
May 27, 2011·The Journal of Experimental Biology·Megan M DawsonElizabeth L Brainerd
Dec 6, 2001·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·R G Bout, G A Zweers
Oct 26, 2005·Journal of Theoretical Biology·Preeda MeekangvanLawrence Schovanec
May 24, 2011·Developmental Biology·R Christian SolemRichard A Schneider