Meeting Abstract 98.9  Wednesday, Jan. 7  The series elastic shock absorber: tendon elasticity reduces peak muscle forces during active lengthening ROBERTS, T.J.*; AZIZI, E.; Brown University thomas_roberts@brown.edu Tendons store and release mechanical energy when force is applied to them. This spring-like behavior can conserve muscle mechanical power for cyclical activities like running, or amplify it for high-power […]

Meeting Abstract 98.7  Wednesday, Jan. 7  The kinetics and kinematics of human performance: Trade-offs between force and accuracy ALMEDIA, Suellen*; IRSCHICK, Duncan; University of Massachusetts at Amherst; University of Massachusetts at Amherst salmeida@student.umass.edu The production of maximum force during difficult motor tasks is presumed to trade-off with accuracy, but we know relatively little about the nature of […]

Meeting Abstract 98.10  Wednesday, Jan. 7  Muscle performance during frog jumping: influence of series elasticity on muscle length-tension behavior AZIZI, E*; ROBERTS, TJ; Brown University; Brown University manny_azizi@brown.edu The remarkable jumping ability of most frogs cant be explained solely from muscle properties. The maximum power available from hindlimb muscles has been shown to be insufficient to power […]

Meeting Abstract 98.1  Wednesday, Jan. 7  Muscle Function in a Complex Muscle During Terrestrial and Aquatic Locomotion CARR, J.A.*; MARSH, R.L.; Northeastern University; Northeastern University carr.je@gmail.com Understanding the mechanical function of muscles with extensive origins and insertions is challenging. The Iliotibialis lateralis pars postacetabularis (ILPO) is one of the largest muscles in the hindlimb of cursorial birds, […]

Meeting Abstract 98.11  Wednesday, Jan. 7  Force transmission versus speed amplification in a four bar linkage mechanism: counterintuitive results in the mantis shrimps strike CLAVERIE, Thomas*; PATEK, Sheila N.; Univ. of California, Berkeley; Univ. of California, Berkeley tclaverie@berkeley.edu Four bar linkages are simple mechanical systems that can amplify or reduce rotation. Most biological four bar systems have […]

Meeting Abstract 98.8  Wednesday, Jan. 7  Flexor vs. extensor activity during jumping and swimming in Rana pipiens NOYES, N*; GILLIS, GB; Mount Holyoke College; Mount Holyoke College ggillis@mtholyoke.edu Despite widespread study of jumping and swimming in anurans, little is known about the functional roles of limb flexor muscles in these animals. Work in toads demonstrates some overlap […]

Meeting Abstract 98.4  Wednesday, Jan. 7  Fatigue fiddles with fowl function: Altered muscle function during locomotion HIGHAM, T.E.*; BIEWENER, A.A.; Clemson University; Harvard University thigham@clemson.edu For over a century, scientists have been captivated and challenged by the mechanisms and effects of muscle fatigue, which is defined as a reduction in muscle force as a consequence of exercise. […]

Meeting Abstract 98.2  Wednesday, Jan. 7  Effects of aging on locomotor dynamics and hindlimb muscle force production in the rat HORNER, AM*; RUSS, DW; BIKNEVICIUS, AR; Ohio Univ., Athens, OH; Ohio Univ. School of Physical Therapy, Athens, OH; Ohio Univ. College of Osteopathic Medicine, Athens, OH ah312505@ohio.edu Attenuation of locomotor function is common in many species of […]

Meeting Abstract 98.5  Wednesday, Jan. 7  Cost of muscle force production during legged locomotion in guinea fowl. MARSH, Richard L.*; HITCHCOCK, Amanda C.; TRUONG, Rosemary; PROPERT, Matthew W.G.; Northeastern University; Northeastern University; Northeastern University; Northeastern University r.marsh@neu.edu We combined measures of joint moments, joint angles, and instantaneous effective moment arms at the ankle and tarsometatarsal-phalangeal joints with […]

Meeting Abstract 98.3  Wednesday, Jan. 7  Adaptations of the perivertebral musculature to different locomotor behaviours in lizards. MORITZ, S.; Friedrich-Schiller-Universitaet Jena sabine.moritz@uni-jena.de Although the trunk and its associated musculature play an important role during locomotion in lizards, studies on the locomotor apparatus are biased towards legs and only very few studies on the axial musculature exist. One […]