Meeting Abstract 135.2  Monday, Jan. 7  Neural crest derivation of the bony skull of the Mexican axolotl and its implications for vertebrate skull evolution PIEKARSKI, N.*; HANKEN, J.; Harvard University; Harvard University npiekarski@oeb.harvard.edu Cartilages and bones of the craniate skull are derived from two embryonic sources, neural crest and mesoderm. Contributions of these tissues to the skull […]

Meeting Abstract 135.6  Monday, Jan. 7  Are swimbladders inverted lungs? Evidence from developmental genetics CASS, AN*; MCCUNE, AR; Cornell University; Cornell University anc24@cornell.edu The homology of lungs and swimbladders has been accepted to varying degrees by the great morphologists of the 19th and 20th centuries. We have recently shown that a shared developmental regulatory network underlies the […]

Meeting Abstract 135.4  Monday, Jan. 7  A dual embryonic origin of the vertebrate pharyngeal skeleton SEFTON, E.M.*; PIEKARSKI, N.; HANKEN, J.; Harvard University esefton@oeb.harvard.edu The pharyngeal-arch skeleton is a hallmark of vertebrates. In basal taxa, it supports the gills and muscles of the pharynx, whereas in more derived groups it surrounds the larynx and trachea. That most […]

Meeting Abstract 135-2  Sunday, Jan. 7 13:45 – 14:00  Viscous shearing in the sarcomere MALINGEN, SA*; CASS, JA; DANIEL, TL; Univ. of Washington; Univ. of Washington; Univ. of Washington danielt@uw.edu http://faculty.washington.edu/danielt/ Cells interact dynamically with their environment, often altering their structure in response to stimuli. Architectural changes within cells occur in a (generally) small fluid filled environment, […]

Meeting Abstract 135-4  Sunday, Jan. 7 14:15 – 14:30  Unsteady Nonlinear Elasticity Modelling Skeletal Muscle in 3D DOMINGUEZ, SA*; RYAN, DS; NIGAM, N; WAKELING, JM; Simon Fraser University, Burnaby, BC; Simon Fraser University, Burnaby, BC; Simon Fraser University, Burnaby, BC; Simon Fraser University, Burnaby, BC domingue@sfu.ca In this presentation we introduce a fully dynamic model to describe […]

Meeting Abstract 135-8  Sunday, Jan. 7 15:15 – 15:30  Predicting in vivo muscle force in running guinea fowl using a muscle model based on the winding filament hypothesis WHITNEY, CW*; DALEY , MA; NISHIKAWA, K; Northern Arizona University ; Royal Veterinary College; Northern Arizona University cw729@nau.edu Although a large amount of effort has been put towards modeling […]

Meeting Abstract 135-6  Sunday, Jan. 7 14:45 – 15:00  Load-dependent muscle work tunes perturbation response with changing running frequency. LIBBY, T*; CHUKWUEKE, C; SPONBERG, S; University of Washington; Georgia Institute of Technology; Georgia Institute of Technology tlibby@berkeley.edu Muscle’s intrinsic properties can stabilize movement through the length- and velocity-dependence encompassed in Hill-like models, but these models fail to […]

Meeting Abstract 135-1  Sunday, Jan. 7 13:30 – 13:45  Flow and diffusion together mediate substrate delivery into the crowded lattice of contractile filaments CASS, J.A.*; DANIEL, T.L.; Univ. of Washington; Univ. of Washington danielt@uw.edu http://faculty.washington.edu/danielt/ Muscle contraction is mediated by myosin motors that derive their energy from ATP hydrolysis.  Recent research suggests that diffusion may be limiting […]

Meeting Abstract 135-7  Sunday, Jan. 7 15:00 – 15:15  Developmental Plasticity of Musculoskeletal Structure and Locomotor Function in Guinea Fowl (Numida meleagris) RUBENSON, J.*; SALZANO, M.Q.; COX, S.M.; PIAZZA, S.J.; Penn State University; Penn State University; Penn State University; Penn State University jonas@psu.edu http://www.locomotionlab.net We explored whether animals exhibit musculoskeletal plasticity that correspond to different locomotor requirements […]

Meeting Abstract 135-5  Sunday, Jan. 7 14:30 – 14:45  Cyclical Work done by a Compartmentalized Muscle TIJS, C*; KONOW, N; BIEWENER, AA; Concord Field Station, Harvard University; Concord Field Station, Harvard University; Dept. Biol. Sci. U. Mass. Lowell; Concord Field Station, Harvard University chris_tijs@fas.harvard.edu Most physiological analyses and musculoskeletal models assume all fascicles of a muscle to […]