F.W. Olin Science Center, Room 2375 Professor Ahn\u2019s research focuses on the neural control and mechanics of animal locomotion. We take an integrative and multi-disciplinary approach to examine the different levels of organization that influence the behavioral output of the neuro-musculo-skeletal system in animals such as frogs, lizards, tarantulas, and even humans! Our work includes examining the neural signals sent to muscles and how the different levels of musculo-skeletal organization respond to these neural signals. By spanning the fields of muscle physiology, biomechanics, and motor control, we hope to discover general principles underlying the neuro-mechanical basis of legged locomotion.<\/p>\n\n\n\n *Wessbecher LS & Ahn AN<\/strong>. 2019. Lower leg morphology in runners: Forefoot strikers have longer heels but not bigger muscles than rearfoot strikers. J. Exp. Biol.<\/em> 222: jeb187815. doi:10.1242\/jeb.187815<\/p>\n\n\n\n Ahn AN<\/strong>, Konow N, Tijs C & Biewener AA. 2018. Different fascicle segments within vertebrate muscles can operate on different regions of their force-length relationships. Integ Comp Biol.<\/em> 58:219-231. doi:10.1093\/icb\/icy040<\/p>\n\n\n\n *Rubin YS, *Young MHY, Wright JC, Whitaker DL & Ahn<\/strong> AN<\/strong>. 2016. Exceptional locomotor performance in mites. J. Exp. Biol<\/em>. 219:676-685.<\/p>\n\n\n\n *Booster NA, *Su FY, Adolph SC & Ahn AN.<\/strong> 2015. Effect of temperature on limb kinematics in a sprinting tarantula , Aphonopelma hentzi<\/em>: Potential limitations of hydraulic joint actuation. J. Exp. Biol.<\/em><\/p>\n\n\n\n Ahn AN, *<\/strong>Brayton C, *Bhatia T & *Martin P. <\/strong>2014. <\/strong>The neural control and kinematics of forefoot and rearfoot strike runners. J. Sport Health Sci.<\/em> 3:102-112. DOI: 10.1016\/j.jshs.2014.03.007 (theme journal)<\/p>\n\n\n\n Ahn AN<\/strong>. 2012. How muscle function – the work loop technique. J. Exp. Biol. <\/em>215:1051-1052.<\/p>\n\n\n\n Ahn AN<\/strong>, Kang JK*, Quitt MA*, Davidson BD*, Nguyen CT*. 2011. Variability of neural activation during walking in humans: Short heels and big calves<\/a>. Biol. Lett. <\/em>doi:10.1098\/rsbl.2010.1169<\/p>\n\n\n\n Wu GC*, Wright JC, Whitaker DL & Ahn AN<\/strong>. 2010. Kinematic evidence for superfast locomotory muscle in two species of teneriffiid mites<\/a>. J. Exp. Biol<\/em>.213<\/strong>: 2551-2556.<\/p>\n\n\n\n Nishikawa K, Biewener A, Aerts P, Ahn A<\/strong> et al. 2007. Neuromechanics: An integrative approach for understand motor control<\/a>. Integr. Comp. Biol.<\/em> 47<\/strong>: 16-54.<\/p>\n\n\n\n Ahn AN<\/strong>, Meijer K & Full RJ. 2006. In situ muscle power differs without varying in vitro mechanical properties in two insect leg muscles innervated by the same motor neuron<\/a>. J. Exp. Biol.<\/em> 209<\/strong>: 3370-3382.<\/p>\n\n\n\n Biewener AA & Ahn AN<\/strong>. 2006. Tired of fatigue? Factors affecting the force-length relationship of muscle<\/a>. J. Appl. Physiol.<\/em> 101: 5-6.<\/p>\n\n\n\n Ahn AN<\/strong>, Furrow E* & Biewener AA. 2004. Walking and running in the red-legged running frog<\/a>, Kassina<\/em> maculata<\/em>. J. Exp. Biol.<\/em> 207<\/strong>: 399-410.<\/p>\n\n\n\n Ahn AN<\/strong>, Monti RJ & Biewener AA. 2003. In vivo and in vitro heterogeneity of segment length changes in the semimembranosus muscle of the toad<\/a>. J. Physiol. <\/em>549<\/strong>: 877-888.<\/p>\n\n\n\n Ahn AN<\/strong> & Full RJ. 2002. A motor and a brake: two leg extensor muscles acting at the same joint manage energy differently in a running insect<\/a>. J. Exp. Biol.<\/em> 205<\/strong>: 379-389.<\/p>\n\n\n\n Full RJ, Stokes DR, Ahn AN<\/strong> & Josephson RK. 1998. Energy absorption during running by leg muscles in a cockroach<\/a>. J. Exp. Biol<\/em>. 201<\/strong>: 997-1012. PDF of article<\/a>.<\/p>\n\n\n\n Full RJ &\u00a0Ahn AN<\/strong>. 1995. Static forces and moments generated in the insect leg — comparison of a 3-dimensional musculoskeletal computer-model with experimental measurements<\/a>.\u00a0J. Exp. Biol.<\/em>\u00a0198<\/strong>: 1285-1298. PDF of article<\/a>.<\/p>\n\n\n\n Weinstein RB, Full RJ & Ahn AN<\/strong>. 1994. Moderate dehydration decreases locomotor performance of the ghost crab, Ocypode<\/em> quadrata<\/em>. Physiol. Zool.<\/em>67<\/strong>: 873-891.<\/p>\n\n\n\n * undergraduate author<\/p>\n","protected":false},"excerpt":{"rendered":" Professor of Biology F.W. Olin Science Center, Room 23751250 N. Dartmouth Ave.Claremont, CA 91711909.607.9122aahn@hmc.edu Education and Professional Experience Teaching Research […]<\/p>\n","protected":false},"author":1,"featured_media":1545,"parent":8,"menu_order":0,"comment_status":"closed","ping_status":"open","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-448","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.hmc.edu\/biology\/wp-json\/wp\/v2\/pages\/448","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hmc.edu\/biology\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.hmc.edu\/biology\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.hmc.edu\/biology\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hmc.edu\/biology\/wp-json\/wp\/v2\/comments?post=448"}],"version-history":[{"count":17,"href":"https:\/\/www.hmc.edu\/biology\/wp-json\/wp\/v2\/pages\/448\/revisions"}],"predecessor-version":[{"id":1995,"href":"https:\/\/www.hmc.edu\/biology\/wp-json\/wp\/v2\/pages\/448\/revisions\/1995"}],"up":[{"embeddable":true,"href":"https:\/\/www.hmc.edu\/biology\/wp-json\/wp\/v2\/pages\/8"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.hmc.edu\/biology\/wp-json\/wp\/v2\/media\/1545"}],"wp:attachment":[{"href":"https:\/\/www.hmc.edu\/biology\/wp-json\/wp\/v2\/media?parent=448"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
1250 N. Dartmouth Ave.
Claremont, CA 91711
909.607.9122<\/a>
aahn@hmc.edu<\/a><\/p>\n\n\n\nEducation and Professional Experience<\/h2>\n\n\n\n
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Teaching<\/h2>\n\n\n\n
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Research Interests<\/h2>\n\n\n\n
Selected Publications<\/h2>\n\n\n\n