Shadmehr, Reza

Professor
Som Biomedical EngineeringBME Profile

Traylor 410
(410) 614-2458
shadmehr@jhu.edu

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About

Education
  • Ph.D. 1991, Univ Southern California
  • Master of Science 1987, Univ Southern California
  • Bachelor of Science 1985, Gonzaga University
Experience
  • 2017 - Present:  ADJUNCT PROFESSOR (NE), SOM Neurology
  • 2013 - 2017:  JOINT/SECONDARY FACULTY, SOM Neuroscience
  • 2004 - Present:  Professor, SOM Neuroscience
  • 2000 - 2004:  Associate Professor, SOM Neuroscience
  • 1999 - 2000:  Assistant Professor, SOM Neuroscience

Publications

Journal Articles
  • Reppert TR, Rigas I, Herzfeld DJ, Sedaghat-Nejad E, Komogortsev O, Shadmehr R (2018).  Movement vigor as a traitlike attribute of individuality.  Journal of Neurophysiology.  120(2).
  • Summerside EM, Shadmehr R, Ahmed AA (2018).  Vigor of reaching movements: Reward discounts the cost of effort.  Journal of Neurophysiology.  119(6).
  • Herzfeld DJ, Kojima Y, Soetedjo R, Shadmehr R (2018).  Encoding of error and learning to correct that error by the Purkinje cells of the cerebellum.  Nature Neuroscience.  21(5).
  • Albert ST, Shadmehr R (2018).  Estimating properties of the fast and slow adaptive processes during sensorimotor adaptation.  Journal of Neurophysiology.  119(4).
  • Shadmehr R (2017).  Distinct neural circuits for control of movement vs. Holding still.  Journal of Neurophysiology.  117(4).
  • Shadmehr R (2017).  Learning to predict and control the physics of our movements.  Journal of Neuroscience.  37(7).
  • Shadmehr R, Huang HJ, Ahmed AA (2016).  A Representation of Effort in Decision-Making and Motor Control.  Current Biology.  26(14).
  • Albert ST, Shadmehr R (2016).  The neural feedback response to error as a teaching signal for the motor learning system.  Journal of Neuroscience.  36(17).
  • Rigas I, Komogortsev O, Shadmehr R (2016).  Biometric recognition via eye movements: Saccadic vigor and acceleration cues.  ACM Transactions on Applied Perception.  13(2).
  • Reppert TR, Lempert KM, Glimcher PW, Shadmehr R (2015).  Modulation of saccade vigor during value–based decision making.  Journal of Neuroscience.  35(46).
  • Herzfeld DJ, Kojima Y, Soetedjo R, Shadmehr R (2015).  Encoding of action by the Purkinje cells of the cerebellum.  Nature.  526(7573).
  • Salimpour Y, Mari ZK, Shadmehr R (2015).  Altering effort costs in Parkinson’s disease with noninvasive cortical stimulation.  Journal of Neuroscience.  35(35).
  • Hanajima R, Shadmehr R, Ohminami S, Tsutsumi R, Shirota Y, Shimizu T, Tanaka N, Terao Y, Tsuji S, Ugawa Y, Uchimura M, Inoue M, Kitazawa S (2015).  Modulation of error-sensitivity during a prism adaptation task in people with cerebellar degeneration.  Journal of Neurophysiology.  114(4).
  • Marko MK, Crocetti D, Hulst T, Donchin O, Shadmehr R, Mostofsky SH (2015).  Behavioural and neural basis of anomalous motor learning in children with autism.  Brain.  138(3).
  • Vaswani PA, Shmuelof L, Haith AM, Delnicki RJ, Huang VS, Mazzoni P, Shadmehr R, Krakauer JW (2015).  Persistent residual errors in motor adaptation tasks: Reversion to baseline and exploratory escape.  Journal of Neuroscience.  35(17).
  • Pekny SE, Shadmehr R (2015).  Optimizing effort: Increased efficiency of motor memory with time away from practice.  Journal of Neurophysiology.  113(2).
  • Pekny SE, Izawa J, Shadmehr R (2015).  Reward-dependent modulation of movement variability.  Journal of Neuroscience.  35(9).
  • Orban de Xivry JJ, Shadmehr R (2014).  Electrifying the motor engram: effects of tDCS on motor learning and control.  Experimental Brain Research.  232(11).
  • Herzfeld DJ, Shadmehr R (2014).  Motor variability is not noise, but grist for the learning mill.  Nature Neuroscience.  17(2).
  • Herzfeld DJ, Shadmehr R (2014).  Cerebellum estimates the sensory state of the body.  Trends in Cognitive Sciences.  18(2).
  • Choi JES, Vaswani PA, Shadmehr R (2014).  Vigor of movements and the cost of time in decision making.  Journal of Neuroscience.  34(4).
  • Salimpour Y, Shadmehr R (2014).  Motor costs and the coordination of the two arms.  Journal of Neuroscience.  34(5).
  • Herzfeld DJ, Vaswani PA, Marko MK, Shadmehr R (2014).  A memory of errors in sensorimotor learning..  Science (New York, N.Y.).  345(6202).
  • Herzfeld DJ, Pastor D, Haith AM, Rossetti Y, Shadmehr R, O'Shea J (2014).  Contributions of the cerebellum and the motor cortex to acquisition and retention of motor memories.  NeuroImage.  98.
  • Vaswani PA, Shadmehr R (2013).  Decay of motor memories in the absence of error.  Journal of Neuroscience.  33(18).
  • Orban de Xivry JJ, Ahmadi-Pajouh MA, Harran MD, Salimpour Y, Shadmehr R (2013).  Changes in corticospinal excitability during reach adaptation in force fields.  Journal of Neurophysiology.  109(1).
  • Reppert TR, Choi JES, Haith AM, Shadmehr R (2012).  Changes in saccade kinematics associated with the value and novelty of a stimulus.  2012 46th Annual Conference on Information Sciences and Systems, CISS 2012.
  • Marko MK, Haith AM, Harran MD, Shadmehr R (2012).  Sensitivity to prediction error in reach adaptation.  Journal of Neurophysiology.  108(6).
  • Haith AM, Reppert TR, Shadmehr R (2012).  Evidence for hyperbolic temporal discounting of reward in control of movements.  Journal of Neuroscience.  32(34).
  • Ahmadi-Pajouh MA, Towhidkhah F, Shadmehr R (2012).  Preparing to reach: Selecting an adaptive long-latency feedback controller.  Journal of Neuroscience.  32(28).
  • Izawa J, Pekny SE, Marko MK, Haswell CC, Shadmehr R, Mostofsky SH (2012).  Motor learning relies on integrated sensory inputs in ADHD, but over-selectively on proprioception in autism spectrum conditions.  Autism Research.  5(2).
  • Izawa J, Criscimagna-Hemminger SE, Shadmehr R (2012).  Cerebellar contributions to reach adaptation and learning sensory consequences of action.  Journal of Neuroscience.  32(12).
  • Pekny SE, Criscimagna-Hemminger SE, Shadmehr R (2011).  Protection and expression of human motor memories.  Journal of Neuroscience.  31(39).
  • Xu-Wilson M, Tian J, Shadmehr R, Zee DS (2011).  TMS perturbs saccade trajectories and unmasks an internal feedback controller for saccades.  Journal of Neuroscience.  31(32).
  • Orban De Xivry JJ, Criscimagna-Hemminger SE, Shadmehr R (2011).  Contributions of the motor cortex to adaptive control of reaching depend on the perturbation schedule.  Cerebral Cortex.  21(7).
  • de Xivry JJO, Marko MK, Pekny SE, Pastor D, Izawa J, Celnik P, Shadmehr R (2011).  Stimulation of the human motor cortex alters generalization patterns of motor learning.  Journal of Neuroscience.  31(19).
  • Izawa J, Shadmehr R (2011).  Learning from sensory and reward prediction errors during motor adaptation.  PLoS Computational Biology.  7(3).
  • Shadmehr R (2010).  Control of movements and temporal discounting of reward.  Current Opinion in Neurobiology.  20(6).
  • Keisler A, Shadmehr R (2010).  A shared resource between declarative memory and motor memory.  Journal of Neuroscience.  30(44).
  • Shadmehr R, Smith MA, Krakauer JW (2010).  Error correction, sensory prediction, and adaptation in motor control.  Annual Review of Neuroscience.  33.
  • Shadmehr R, De Xivry JJO, Xu-Wilson M, Shih TY (2010).  Temporal discounting of reward and the cost of time in motor control.  Journal of Neuroscience.  30(31).
  • Criscimagna-Hemminger SE, Bastian AJ, Shadmehr R (2010).  Size of error affects cerebellar contributions to motor learning.  Journal of Neurophysiology.  103(4).
  • Diedrichsen J, Shadmehr R, Ivry RB (2010).  The coordination of movement: optimal feedback control and beyond.  Trends in Cognitive Sciences.  14(1).
  • Rothwell JC, Shadmehr R, Yates B (2010).  Editorial: Neurophysiology and computational neuroscience.  Experimental Brain Research.  200(3-4).
  • Xu-Wilson M, Chen-Harris H, Zee DS, Shadmehr R (2009).  Cerebellar contributions to adaptive control of saccades in humans.  Journal of Neuroscience.  29(41).
  • Haswell CC, Izawa J, R Dowell L, H Mostofsky S, Shadmehr R (2009).  Representation of internal models of action in the autistic brain.  Nature Neuroscience.  12(8).
  • Huang VS, Shadmehr R (2009).  Persistence of motor memories reflects statistics of the learning event.  Journal of Neurophysiology.  102(2).
  • Xu-Wilson M, Zee DS, Shadmehr R (2009).  The intrinsic value of visual information affects saccade velocities.  Experimental Brain Research.  196(4).
  • Tian J, Ethier V, Shadmehr R, Fujita M, Zee DS (2009).  Some perspectives on saccade adaptation.  Annals of the New York Academy of Sciences.  1164.
  • Ethier V, Zee DS, Shadmehr R (2008).  Changes in control of saccades during gain adaptation.  Journal of Neuroscience.  28(51).
  • Izawa J, Shadmehr R (2008).  On-line processing of uncertain information in visuomotor control.  Journal of Neuroscience.  28(44).
  • Criscimagna-Hemminger SE, Shadmehr R (2008).  Consolidation patterns of human motor memory.  Journal of Neuroscience.  28(39).
  • Kluzik J, Diedrichsen J, Shadmehr R, Bastian AJ (2008).  Reach adaptation: What determines whether we learn an internal model of the tool or adapt the model of our arm?.  Journal of Neurophysiology.  100(3).
  • Huang VS, Shadmehr R, Diedrichsen J (2008).  Active learning: Learning a motor skill without a coach.  Journal of Neurophysiology.  100(2).
  • Rowland LM, Shadmehr R, Kravitz D, Holcomb HH (2008).  Sequential neural changes during motor learning in schizophrenia.  Psychiatry Research - Neuroimaging.  163(1).
  • Ethier V, Zee DS, Shadmehr R (2008).  Spontaneous recovery of motor memory during saccade adaptation.  Journal of Neurophysiology.  99(5).
  • Izawa J, Rane T, Donchin O, Shadmehr R (2008).  Motor adaptation as a process of reoptimization.  Journal of Neuroscience.  28(11).
  • Chen-Harris H, Joiner WM, Ethier V, Zee DS, Shadmehr R (2008).  Adaptive control of saccades via internal feedback.  Journal of Neuroscience.  28(11).
  • Shadmehr R, Krakauer JW (2008).  A computational neuroanatomy for motor control.  Experimental Brain Research.  185(3).
  • Gidley Larson JC, Bastian AJ, Donchin O, Shadmehr R, Mostofsky SH (2008).  Acquisition of internal models of motor tasks in children with autism.  Brain.  131(11).
  • Hadipour-Niktarash A, Lee CK, Desmond JE, Shadmehr R (2007).  Impairment of retention but not acquisition of a visuomotor skill through time-dependent disruption of primary motor cortex.  Journal of Neuroscience.  27(49).
  • Körding KP, Tenenbaum JB, Shadmehr R (2007).  Multiple timescales and uncertainty in motor adaptation.  Advances in Neural Information Processing Systems.
  • Krakauer JW, Shadmehr R (2007).  Towards a computational neuropsychology of action.  Progress in Brain Research.  165.
  • Tseng YW, Diedrichsen J, Krakauer JW, Shadmehr R, Bastian AJ (2007).  Sensory prediction errors drive cerebellum-dependent adaptation of reaching.  Journal of Neurophysiology.  98(1).
  • Diedrichsen J, Criscimagna-Hemminger SE, Shadmehr R (2007).  Dissociating timing and coordination as functions of the cerebellum.  Journal of Neuroscience.  27(23).
  • Huang VS, Shadmehr R (2007).  Evolution of motor memory during the seconds after observation of motor error.  Journal of Neurophysiology.  97(6).
  • Kording KP, Tenenbaum JB, Shadmehr R (2007).  The dynamics of memory as a consequence of optimal adaptation to a changing body.  Nature Neuroscience.  10(6).
  • Krakauer JW, Mazzoni P, Ghazizadeh A, Ravindran R, Shadmehr R (2006).  Generalization of motor learning depends on the history of prior action.  PLoS Biology.  4(10).
  • Chen H, Hua SE, Smith MA, Lenz FA, Shadmehr R (2006).  Effects of human cerebellar thalamus disruption on adaptive control of reaching.  Cerebral Cortex.  16(10).
  • Vaziri S, Diedrichsen J, Shadmehr R (2006).  Why does the brain predict sensory consequences of oculomotor commands? Optimal integration of the predicted and the actual sensory feedback.  Journal of Neuroscience.  26(16).
  • Hwang EJ, Smith MA, Shadmehr R (2006).  Dissociable effects of the implicit and explicit memory systems on learning control of reaching.  Experimental Brain Research.  173(3).
  • Smith MA, Ghazizadeh A, Shadmehr R (2006).  Interacting adaptive processes with different timescales underlie short-term motor learning.  PLoS Biology.  4(6).
  • Hwang EJ, Smith MA, Shadmehr R (2006).  Adaptation and generalization in acceleration-dependent force fields.  Experimental Brain Research.  169(4).
  • Krakauer JW, Shadmehr R (2006).  Consolidation of motor memory.  Trends in Neurosciences.  29(1).
  • Chen H, Smith MA, Shadmehr R (2005).  Effects of deep brain stimulation on adaptive control of reaching.  Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings.  7 VOLS.
  • Diedrichsen J, Hashambhoy Y, Rane T, Shadmehr R (2005).  Neural correlates of reach errors.  Journal of Neuroscience.  25(43).
  • Eun JH, Shadmehr R (2005).  Internal models of limb dynamics and the encoding of limb state.  Journal of Neural Engineering.  2(3).
  • Diedrichsen J, Shadmehr R (2005).  Detecting and adjusting for artifacts in fMRI time series data.  NeuroImage.  27(3).
  • Smith MA, Shadmehr R (2005).  Intact ability to learn internal models of arm dynamics in Huntington's disease but not cerebellar degeneration.  Journal of Neurophysiology.  93(5).
  • Dordevic GS, Rašic M, Shadmehr R (2005).  Parametric models for motion planning and control in biomimetic robotics.  IEEE Transactions on Robotics.  21(1).
  • Wainscott SK, Donchin O, Shadmehr R (2005).  Internal models and contextual cues: Encoding serial order and direction of movement.  Journal of Neurophysiology.  93(2).
  • Donchin O, Shadmehr R (2004).  Change of desired trajectory caused by training in a novel motor task.  Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings.  26 VI.
  • Shadmehr R (2004).  Generalization as a behavioral window to the neural mechanisms of learning internal models.  Human Movement Science.  23(5).
  • Hwang EJ, Donchin O, Smith MA, Shadmehr R (2003).  A gain-field encoding of limb position and velocity in the internal model of arm dynamics.  PLoS Biology.  1(2).
  • Nanayakkara T, Shadmehr R (2003).  Saccade Adaptation in Response to Altered Arm Dynamics.  Journal of Neurophysiology.  90(6).
  • Donchin O, Francis JT, Shadmehr R (2003).  Quantifying generalization from trial-by-trial behavior of adaptive systems that learn with basis functions: Theory and experiments in human motor control.  Journal of Neuroscience.  23(27).
  • Criscimagna-Hemminger SE, Donchin O, Gazzaniga MS, Shadmehr R (2003).  Learned dynamics of reaching movements generalize from dominant to nondominant arm.  Journal of Neurophysiology.  89(1).
  • Wang T, Dordevic GS, Shadmehr R (2002).  Learning the dynamics of reaching movements results in the modification of arm impedance and long-latency perturbation responses.  Biological Cybernetics.  86(6).
  • Nanayakkara DPT, Watanabe K, Kiguchi K, Shadmehr R (2002).  Intelligent control of a 7-DOF manipulator based on model primitives.  IEEE International Symposium on Intelligent Control - Proceedings.
  • Donchin O, Sawaki L, Madupu G, Cohen LG, Shadmehr R (2002).  Mechanisms influencing acquisition and recall of motor memories.  Journal of Neurophysiology.  88(4).
  • Ariff G, Donchin O, Nanayakkara T, Shadmehr R (2002).  A real-time state predictor in motor control: Study of saccadic eye movements during unseen reaching movements.  Journal of Neuroscience.  22(17).
  • Donchin O, Shadmehr R (2002).  Linking motor learning to function approximation: Learning in an unlearnable force field.  Advances in Neural Information Processing Systems.
  • Wang T, Dordevic GS, Shadmehr R (2001).  Learning the dynamics of reaching movements results in the modification of arm impedance and long-latency perturbation responses.  Biological Cybernetics.  85(6).
  • Nezafat R, Shadmehr R, Holcomb HH (2001).  Long-term adaptation to dynamics of reaching movements: A PET study.  Experimental Brain Research.  140(1).
  • Shadmehr R, Moussavi ZMK (2000).  Spatial generalization from learning dynamics of reaching movements.  Journal of Neuroscience.  20(20).
  • Thoroughman KA, Shadmehr R (2000).  Learning of action through adaptive combination of motor primitives.  Nature.  407(6805).
  • Smith MA, Shadmehr R (2000).  Error correction and the basal ganglia Response to Lawrence (2000).  Trends in Cognitive Sciences.  4(10).
  • Smith MA, Brandt J, Shadmehr R (2000).  Motor disorder in Huntington's disease begins as a dysfunction in error feedback control.  Nature.  403(6769).
  • Tamminga CA, Shadmehr R, Holcomb HH (2000).  Cognition: Procedural memory.  American Journal of Psychiatry.  157(2).
  • Tamminga CA, Holcomb HH, Shadmehr R (2000).  Images in neuroscience.  American Journal of Psychiatry.  157(3).
  • Thoroughman KA, Shadmehr R (1999).  Electromyographic correlates of learning an internal model of reaching movements.  Journal of Neuroscience.  19(19).
  • Shadmehr R, Holcomb HH (1999).  Inhibitory control of competing motor memories.  Experimental Brain Research.  126(2).
  • Bhushan N, Shadmehr R (1999).  Computational nature of human adaptive control during learning of reaching movements in force fields.  Biological Cybernetics.  81(1).
  • Bhushan N, Shadmehr R (1999).  Evidence for a forward dynamics model in human adaptive motor control.  Advances in Neural Information Processing Systems.
  • Shadmehr R, Brandt J, Corkin S (1998).  Time-dependent motor memory processes in amnesic subjects.  Journal of Neurophysiology.  80(3).
  • Shadmehr R, Holcomb HH (1997).  Neural correlates of motor memory consolidation.  Science.  277(5327).
  • Shadmehr R, Brashers-Krug T (1997).  Functional stages in the formation of human long-term motor memory.  Journal of Neuroscience.  17(1).
  • Todorov E, Shadmehr R, Bizzi E (1997).  Augmented feedback presented in a virtual environment accelerates learning of a difficult motor task.  Journal of Motor Behavior.  29(2).
  • Brashers-Krug T, Shadmehr R, Bizzi E (1996).  Consolidation in human motor memory.  Nature.  382(6588).
  • Sanes JN, Shadmehr R (1995).  Sense of muscular effort and somesthetic afferent information in humans.  Canadian Journal of Physiology and Pharmacology.  73(2).
  • Shadmehr R, Mussa-Ivaldi FA (1994).  Adaptive representation of dynamics during learning of a motor task.  Journal of Neuroscience.  14(5 II).
  • Shadmehr R, Mussa-Ivaldi FA, Bizzi E (1993).  Postural force fields of the human arm and their role in generating multijoint movements.  Journal of Neuroscience.  13(1).
  • Shadmehr R (1993).  Control of equilibrium position and stiffness through postural modules.  Journal of Motor Behavior.  25(3).
  • Shadmehr R, Arbib MA (1992).  A mathematical analysis of the force-stiffness characteristics of muscles in control of a single joint system.  Biological Cybernetics.  66(6).
  • Shadmehr R, Angell D, Chou PB, Oehrlein GS, Jaffe RS (1992).  Principal Component Analysis of Optical Emission Spectroscopy and Mass Spectrometry: Application to Reactive Ion Etch Process Parameter Estimation Using Neural Networks.  Journal of the Electrochemical Society.  139(3).
  • Belman MJ, Shadmehr R (1991).  A target feedback device for ventilatory muscle training.  Journal of Clinical Monitoring.  7(1).
  • Belman MJ, Soo Hoo GW, Kuei JH, Shadmehr R (1990).  Efficacy of positive vs negative pressure ventilation in unloading the respiratory muscles.  Chest.  98(4).
  • Kuei JH, Shadmehr R, Sieck GC (1990).  Relative contribution of neurotransmission failure to diaphragm fatigue.  Journal of Applied Physiology.  68(1).
  • Shadmehr R (1989).  Implementation of the equilibrium trajectory hypothesis for movement generation in the arm.  IJCNN Int Jt Conf Neural Network.
  • Shadmehr R, D'Argenio DZ (1989).  Connectionist modeling vs. Bayesian procedures for sparse data pharmacokinetic parameter estimation.  Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings.  11 pt 6.
  • Shadmehr R, Lindquist GD (1988).  Neural network for pattern generation in the scratch reflex.
  • Belman MJ, Shadmehr R (1988).  Targeted resistive ventilatory muscle training in chronic obstructive pulmonary disease.  Journal of Applied Physiology.  65(6).
  • Shadmehr R, Lindquist GD (1988).  Neural model for modifiable pattern generation in the scratch reflex.  Neural Networks.  1(1 SUPPL).
Book Chapters
  • Albert ST, Shadmehr R (2018).  The cerebellum learns to predict the physics of our movements.  Think Tank: Forty Neuroscientists Explore the Biological Roots of Human Experience.
  • Shadmehr R (2010).  Computational Approaches to Motor Control.  Encyclopedia of Neuroscience.
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