I am interested in the design, function,
and evolution of the vertebrate musculoskeletal system, particularly
in relation to locomotion. My research involves studying patterns of
muscle activation, length change, and force production in vivo, during
various locomotor activities. I have worked on diverse animal systems
ranging from swimming fish to jumping frogs to running mammals. In using
a broadly comparative animal approach to study locomotion, I can gain
insight into general principles underlying musculoskeletal form, function,
and control that transcend specific taxonomic boundaries. In addition,
a well-designed comparative approach provides useful opportunities to
understand the ecological relevance or evolutionary history of structural
and functional aspects of the musculoskeletal system. My ultimate goal
is to understand how the structure, actions, and coordination of multiple
muscle systems lead to the dynamic and diverse locomotor behaviors we
observe in nature.
Two main themes have characterized much of my research. The first is
an investigation into the neuromuscular mechanisms that facilitate functional
versatility during locomotion. The second theme in my research has been
an exploration of the influence of morphological variation on the mechanics
and control of animal movement. Below are some of the projects I've
worked on in the past, as well as several projects I am currently working
on or look forward to working on with new students.
Past Projects
Muscular control of locomotion in aquatic versus terrestrial
environments
Evolution of prey transport behaviors in lower vertebrates
Effects of speed, gait and grade on terrestrial locomotion
in quadrupedal mammals
Undulatory swimming in elongate fishes and salamanders
Current and/or Future Projects
Effects of body size on homologous limb muscle function
during quadrupedal locomotion
Coordination of landing in anuran amphibians (frogs
and toads)
Hindlimb flexor muscle activity patterns during anuran
locomotion