New device gives an amputee the ability to feel the location of his foot

Optogenetic techniques have recently been applied to peripheral nerves as a scientific tool with the translatable go...

K. Endo and H. Herr. Human walking model predicts joint mechanics, electromyography and mechanical economy, IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), St. Louis, MO, Oct. 2009.

K. Endo, E. Swart, H. M. Herr, An artificial gastrocnemius for a transtibial prosthesis, Engineering in Medicine and Biology Society, EMBC, 2009 Annual International Conference of the IEEE, pp.5034-5037, Sep. 2009.

R. Kram, A. M. Grabowski, C. P. McGowan, M. B. Brown, and H. M. Herr. Counterpoint: Artificial legs do not make artificially fast running speeds possible, Journal of Applied Physiology, vol. 108, no. 4, pp. 1012–1014, Apr. 2010.

M. F. Eilenberg, H. Geyer, and H. M. Herr. Control of a powered ankle-foot prosthesis based on a neuromuscular model, IEEE Transactions on Neural Systems and Rehabilitation Engineering, vol. 18, no. 2, pp. 164-173, 2010.

W. Farahat and H. M. Herr. Optimal workloop energetics of muscle-actuated systems an impedance matching view, PLoS Computational Biology, vol. 6, no. 6, 2010.

H. Geyer and H. Herr. A muscle-reflex model that encodes principles of legged mechanics produces human walking dynamics and muscle activities, IEEE Transactions on Neural Systems & Rehabilitation Engineering, 2010.

E. C. Martinez-Villalpando, L. M. Mooney, G. A. Elliott and H. M. Herr. Antagonistic Active Knee Prosthesis. A Metabolic Cost of Walking Comparison with a Variable-Damping Prosthetic Knee, Engineering in Medicine and Biology Society, EMBC, 2011 Annual International Conference of the IEEE, 2011.

G. Elliott, G.S. Sawicki, A. Marecki, H. Herr. The biomechanics and energetics of human running using an elastic knee exoskeleton, International Conference on Rehabilitation Robotics, 2013.

D. Hill and H. M. Herr. Effects of a powered ankle-foot prosthesis on kinetic loading of the contralateral limb: a case series, Proceedings of the IEEE International Conference on Rehabilitation Robotics, 2013.

J. Wang, O. A. Kannape, and H. M. Herr Proportional EMG Control of Ankle Plantar Flexion in a Powered Transtibial Prosthesis, Proceedings of the IEEE International Conference on Rehabilitation Robotics, 2013

L. M. Mooney and H. M. Herr Continuously-Variable Series-Elastic Actuator, Proceedings of the IEEE International Conference on Rehabilitation Robotics, 2013

K. Endo and H. Herr. A model of muscle-tendon function in human walking, IEEE International Conference on Robotics and Automation (ICRA), Kobe, Japan, May 2009.

A. Dollar and H. M. Herr. Active orthoses for the lower-limbs- Challenges and state of the art, Proceedings of the 2007 IEEE International Conference on Rehabilitation Robotics (ICORR), Noordwijk, Netherlands, pp. 968-977, Jun. 2007.

K. Endo, D. Paluska, and H.M. Herr. A quasi-passive model of human leg function in level-ground walking, IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), Beijing, China, Oct. 2006.

D. Paluska and H. M. Herr. The effect of series elasticity on actuator power and work output: Implications for robotic and prosthetic joint design, Robotics and Autonomous Systems, vol. 54, pp. 667–673, 2006.

S. K. Au, P. Dilworth, and H. M. Herr. An ankle-foot emulation system for the study of human walking biomechanics, Proceedings of the IEEE International Conference on Robotics and Automation, Orlando, FL, pp. 2939-2945, May 2006.

W. Farahat and H. M. Herr. An apparatus for characterization and control of isolated muscle, IEEE Transactions on Neural Systems & Rehabilitation Engineering, vol. 13, no. 4, pp. 473-481, 2005.

M. Popovic, A. Goswami, and H. M. Herr. Ground reference points in legged locomotion: Definitions, biological trajectories and control implications, International Journal of Robotics Research, vol. 24, no. 10, pp. 1013-1032, 2005.

W. Farahat and H. M. Herr. A method for identification of hammerstein models of electrically stimulated muscle, 27th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, Shanghai, China, Sep. 2005.

M. Popovic and H.M. Herr. Global motion control and support base planning, IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), Edmonton, Canada, Aug. 2005.

J. Johansson, D. Sherrill, P. Riley, P. Bonato, and H. M. Herr. A clinical comparison of variable-damping and mechanically-passive prosthetic knee devices, American Journal of Physical Medicine & Rehabilitation, vol. 84, no. 8, pp. 563-575, 2005.

M. Popovic, A. Hofmann, and H. Herr. Zero spin angular momentum control: Definition and applicability, 4th IEEE/RAS International Conference on Humanoid Robots, vol. 1, pp. 478–493, 2004.

H. M. Herr and B. Dennis. A swimming robot actuated by living muscle tissue, Journal of NeuroEngineering and Rehabilitation, vol. 1, no. 6, 2004.

H. M. Herr. Multidisciplinary approaches to limb loss: A chain of events leading to a single step, Journal of Rehabilitation Research and Development, White House/VA Conference, Emerging Technologies, Washington, D.C., pp. 76-80, Oct. 2004.

A. Hofmann, S. Massaquoi, M. Popovic, and H. Herr. A sliding controller for bipedal balancing using integrated movement of contact and non-contact limbs, IEEE/RSJ International Conference on Intelligent Robots and Systems, vol. 2, pp. 1952–1959, 2004.

M. Popovic and A. Englehart. Angular momentum primitives for human walking: Biomechanics and control, IEEE/RSJ International Conference on Intelligent Robots and Systems, vol. 2, pp. 1685–1691, 2004.

D.H. Gates, J. Lelas, U. Della Croce, H. M. Herr, P. Bonato

H. M. Herr and R. Kornbluh. New horizons for orthotic and prosthetic technology: Artificial muscle, Smart Structures and Materials: Electroactive Polymer Actuators and Devices, San Diego, CA, Mar. 2004.

H. Krebs, N. Hogan, W. Durfee, and H. Herr. Chapter 48: Rehabilitation Robotics, Orthotics, and Prosthetics, Textbook of Neural Repair and Rehabilitation Vol. 2, 2004.

M. Popovic, A. Hofmann, and H. Herr. Angular momentum regulation during human walking: Biomechanics and control, IEEE International Conference on Robotics and Automation, vol. 3, pp. 2405–2411, 2004.

J. Blaya and H. M. Herr. Adaptive control of a variable-impedance ankle-foot orthosis to assist drop-foot gait, IEEE Transactions on Neural Systems & Rehabilitation Engineering. vol. 12, no. 1, pp. 24-31, 2004.

A. Seyfarth, H. Geyer, and H. M. Herr. Swing-leg retraction: a simple control model for stable running, The Journal of Experimental Biology, vol. 206, pp. 2547-2555, 2003.

H. M. Herr and A. Wilkenfeld. User-adaptive control of a magnetorhelogical prosthetic knee, Industrial Robot: An International Journal, vol. 30, pp. 42-55, 2003.

H. Herr, G. P. Whiteley, and D. Childress. Chapter 5: Cyborg Technology – Biomimetic Orthotic and Prosthetic Technology, SPIE Press, Bellingham, WA, 2003.

P. G. Weyand, M. W. Bundle, C. P. McGowan, A. Grabowski, M. B. Brown, R. Kram, and H. Herr. The fastest runner on artificial legs: Different limbs, similar function?, Journal of Applied Physiology, vol. 107, no. 3, pp. 903–911, Sep. 2009.

C. P. McGowan, A. M. Grabowski, W. J. McDermott, H. M. Herr, and R. Kram. Leg stiffness of sprinters using running-specific prostheses, Journal of the Royal Society Interface, vol. 9, no. 73, pp. 1975-1982, 2012.

S. K. Au, P. Bonato, and H. M. Herr. An EMG-position controlled system for an active ankle-foot prosthesis: An initial experimental study, IEEE 9th International Conference on Rehabilitation Robotics (ICORR): Frontiers of the Human-Machine Interface, Chicago, IL, pp. 375-379, Jun. 2005.

A. M. Dollar and H. Herr. Design of a quasi-passive knee exoskeleton to assist running, Proceedings of the 2008 IEEE/RSJ International Conference on Intelligent Robots and Systems, Nice, France, Sep. 2008.

W. Farahat and H. M. Herr. Workloop energetics of antagonist muscles, 28th International Conference of the IEEE Engineering in Medicine and Biology Society, New York, NY, 2006.

E. C. Martinez-Villalpando, and H. M. Herr. Agonist-antagonist active knee prosthesis: A preliminary study in level-ground walking, Journal of Rehabilitation Research & Development (JRRD), vol. 46, no. 3, pp. 361-73, 2009.

E.C. Martinez-Villalpando, J. Weber, G. Elliott, and H. M. Herr. Design of an agonist-antagonist active knee prosthesis, Proceedings of IEEE BIORobotics Conference, Scottsdale, AZ, 2008.

C. Walsh, D. Paluska, K. Pasch, W. Grand, A. Valiente, and H. M. Herr. Development of a lightweight, underactuated exoskeleton for load-carrying augmentation, Proceedings of the IEEE International Conference on Robotics and Automation, Orlando, FL, pp. 2939-2945, May 2006.

H. M. Herr, A. Wilkenfeld, and J. Blaya. Patient-adaptive prosthetic and orthotic leg systems, Proceedings of the 12th Nordic Baltic Conference on Biomedical Engineering and Medical Physics, Reykjavik, Iceland, pp. 123-128, Jun. 2002.

S. K. Au and H. M. Herr. Initial experimental study on dynamic interaction between an amputee and a powered ankle-foot prosthesis, Workshop on Dynamic Walking: Mechanics and Control of Human and Robot Locomotion, Ann Arbor, MI, May 2006.

H. M. Herr, G. T. Huang, and T. A. McMahon. A model of scale effects in mammalian quadrupedal running, Journal of Experimental Biology, vol. 205, no. 7, pp. 959-967, 2002.

A. E. Kerdok, A. A. Biewener, T. A. McMahon, P. G. Weyand, and H. M. Herr. Energetics and mechanics of human running on surfaces of different stiffnesses, Journal of Applied Physiology, vol. 92, no. 2, pp. 469-478, 2002.

H. M. Herr and T. A. McMahon. A trotting horse model, The International Journal of Robotics Research, vol. 19, no. 6, pp. 566–581, Jun. 2000.

M. Vukobratovic, H. Herr, B. Borovac, M. Popovic, A Hofmann, M Jovanovic, and V. Potkonjak. Biological Principles of Control Selection for a Humanoid Robot’s Dynamic Balance Preservation. International Journal of Humanoid Robotics, vol. 5, no. 4, pp 639-678, 2008.

L. M. Mooney, E. J. Rouse and H. M. Herr. Autonomous exoskeleton reduces metabolic cost of walking, International Conference of the IEEE Engineering in Medicine and Biology Society, August. 2014.

S. K. Au, and H. M. Herr. Powered ankle-foot prosthesis, IEEE Robotics & Automation Magazine, vol. 15, no. 3, pp. 52-59, 2008.

A. Hofmann, M. Popovic, and H. M. Herr. Exploiting angular momentum to enhance bipedal center-of-mass control, IEEE International Conference on Robotics and Automation (ICRA ’09), pp. 4423-4429, 2009.

O. A. Kannape and H. M. Herr Volitional Control of Ankle Plantar Flexion in a Powered Transtibial Prosthesis during Stair-Ambulation, International Conference of the IEEE Engineering in Medicine and Biology Society, August. 2014.

A. Hofmann, M. Popovic, and H. Herr. Humanoid standing control: learning from human demonstration, Journal of Automatic Control, vol. 12, no. 1, pp. 16–22, 2002.

H. Herr, G. Pratt, R. Dennis, N. Rosenthal, and R. Marsh. From swimming to walking: Examples of how biology is helping us design better machines, Second International Congress on Motion Systems, Jena, Germany, Jul. 2001.

J. J. Hu, J. E. Pratt, C.-M. Chew, H. M. Herr, and G. A. Pratt. Virtual model based adaptive dynamic control of a biped walking robot, International Journal on Artificial Intelligence Tools, vol. 8, no. 3, pp. 337–348, Sep. 1999.

H. Herr and N. Langman. Optimization of human-powered elastic mechanisms for endurance amplification, Structural Optimization, vol. 13, no. 1, pp. 65–67, Feb. 1997.

C. Walsh, K. Pasch, and H. M. Herr. An autonomous, underactuated exoskeleton for loadcarrying augmentation, IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), Beijing, China, Oct. 2006.

C. Walsh, K. Endo, and H. M. Herr. A quasi-passive leg exoskeleton for load-carrying augmentation, International Journal of Humanoid Robotics, vol. 4, no. 3, pp. 487-506, 2007.

S. K. Au, J. Weber, and H. Herr. Biomechanical design of a powered ankle-foot prosthesis, IEEE 10th International Conference on Rehabilitation Robotics, pp. 298–303, 2007.

S. K. Au, J. Weber, H. M. Herr and E.C. Martinez-Villapando, Powered ankle-foot prosthesis for the improvement of amputee ambulation, IEEE Engineering in Medicine and Biology International Conference, Lyon, France, pp. 3020-3026, 2007.

E. C. Martinez-Villalpando, H. M. Herr. Estimation of ground reaction force and zero moment point on a powered ankle-foot prosthesis, IEEE Engineering in Medicine and Biology International Conference, Lyon, France, pp. 4687-4692, 2007.

Aisen, B. "An Inertial Measurement-Based Gait Detection System for Active Leg Prostheses"

H.M. Herr and M. Popovic. Angular momentum in human walking, Journal of Experimental Biology, vol. 211, no. 4, pp. 467-481, 2008.

A. Dollar and H. M. Herr. Lower Extremity Exoskeletons and Active Orthoses: Challenges and State-of-the-Art, IEEE Transactions on Robotics, Special Issue on Biorobotics, vol. 24, no. 1, pp. 144-158, 2008.

E. J. Rouse, L. M. Mooney, E. C. Martinez-Villalpando and H. M. Herr A clutchable series-elastic actuator: design of a robotic knee prosthesis for minimum energy consumption, Proceedings of the IEEE International Conference on Rehabilitation Robotics, 2013

M. T. Farrell, H. M. Herr