Steven Jax, PhD

Steven Jax

Institute Scientist, Moss Rehabilitation Research Institute
Director, Perceptual-Motor Control Laboratory

CV (PDF: 34kb / 6 pages)

BA, Psychology, University of Minnesota, 1999.
PhD, Psychology, Pennsylvania State University, 2005.

Research interests

Influence of cognitive and perceptual systems on movement production
Motor skill learning
Perceptual-motor disorders

Current projects

Mirror therapy for hand rehabilitation following stroke
Disrupted visuomotor rotation learning following left hemisphere cortical and cerebellar stroke
Development of a low cost haptic virtual environment for upper limb rehabilitation

Publications

Vaughan, J., Barany, D., Sali, A., Jax, S. A., & Rosenbaum, D. A. (in press). Extending Fitts’ Law to three-dimensional obstacle-avoidance movements: Support for the posture-based motion planning model. Experimental Brain Research.

Jax, S. A., & Buxbaum, L. J. (2010). Response interference between functional and structural actions linked to the same familiar object. Cognition, 115(2), 350 - 355. PMID 20156619

Kapur, P., Jensen, M., Buxbaum, L. J., Jax, S. A., & Kuchenbecker, K. J. (2010). Spatially distributed tactile feedback for kinesthetic motion guidance. Proceedings of the 2010 IEEE Haptics Symposium Conference, 519 – 526.

Medina, J., Jax, S. A., Brown, M. J., & Coslett, H. B. (2010). Contributions of efference copy to limb localization: Evidence from deafferentation. Brain Research, 1355, 104 – 111. PMID 20659430

Botvinick, M., Buxbaum, L. J., Bylsma, L., & Jax, S. A. (2009). Toward an integrated account of object and action selection: A computational analysis and empirical findings from reaching-to-grasp and tool use. Neuropsychologia, 47(2), 671 - 683. PMID 19100758

Jax, S. A., Buxbaum, L. J., Lie, E., & Coslett, H. B. (2009). More than (where the target) meets the eyes: Disrupted visuomotor transformations in optic ataxia. Neuropsychologia, 47 (1), 230 - 238. PMID 18725238

Jax, S. A., & Coslett, H. B. (2009). Disorders of the perceptual-motor system. In Dagmar Sternad (Ed.), Progress in Motor Control – A multidisciplinary perspective (pp. 377 - 391). Springer. PMID 19227510

Jax, S. A., & Rosenbaum, D. A. (2009). Hand path priming in manual obstacle avoidance: Rapid decay of dorsal stream information. Neuropsychologia, 47, 1573 - 1577. PMID 18597796

Medina, J., Jax, S. A., & Coslett, H. B. (2009). Two-component models of reaching: Evidence from deafferentation in a Fitts’ Law task. Neuroscience Letters, 451(3), 222 - 226. PMID 19150390

Rosenbaum, D. A., Vaughan, J., Meulenbroek, R. G. J., Jax, S. A., & Cohen, R. (2009). Smart moves: The psychology of everyday perceptual-motor acts. In P. M. Gollwitzer, J. A. Bargh, & E. Morsella (Eds.), The psychology of action (pp. 121 - 135). Oxford University Press.

Rosenbaum, D. A., Cohen, R., Dawson, A., Jax, S. A., Meulenbroek, R. G. J., van der Wel, R. P. R. D., & Vaughan, J. (2009). The posture-based motion planning framework: New findings related to object manipulation, moving around obstacles, moving in three spatial dimensions, and haptic tracking. In Dagmar Sternad (Ed.), Progress in Motor Control – A multidisciplinary perspective (pp. 485 - 498). Springer. PMID 19227517

Jax, S. A., & Rosenbaum, D. A. (2007). Hand path priming in manual obstacle avoidance: Evidence that the dorsal stream does not only control visually guided actions in real time. Journal of Experimental Psychology: Human Perception and Performance, 33, 425 - 441. PMID 17469977

Jax, S. A., Rosenbaum, D. A., & Vaughan, J. (2007). Extending Fitts’ Law to manual obstacle avoidance. Experimental Brain Research, 180, 775 - 779. PMID 17562027

Rosenbaum, D. A., Cohen, R. G., Jax, S. A., Van Der Wel, R., & Weiss, D. J. (2007). The problem of serial order in behavior: Lashley’s legacy. Human Movement Science, 26, 525 - 554.

Van Der Wel, P. R., Fleckenstein, R., Jax, S. A., & Rosenbaum, D. A. (2007). Hand path priming in manual obstacle avoidance: Evidence for abstract spatio-temporal forms in human motor control. Journal of Experimental Psychology: Human Perception and Performance, 33, 1117 - 1126. PMID 17924811

Jax, S. A., Buxbaum, L. J., & Moll, A. D. (2006). Deficits in movement planning and intrinsic coordinate control in ideomotor apraxia. Journal of Cognitive Neuroscience, 18, 2063 - 2076. PMID 17129191

Rosenbaum, D. A., Augustyn, J. S., Cohen, R. G., & Jax, S. A. (2006). Perceptual-motor expertise. In A. Ericsson, N. Charness, P. J. Feltovich, & R. R. Hoffman (Eds.), Cambridge Handbook of Expertise and Expert Performance (pp. 505 - 520). New York, NY: Cambridge University Press.

Jax, S. A., Rosenbaum, D. A., Vaughan, J., & Meulenbroek, R. G. J.  (2003). Computational motor control and human factors: Modeling movements in real and possible environments. Human Factors, 45, 5 - 27. PMID 12916579

 

WORKS UNDER REVIEW

Medina, J., Jax, S. A., & Coslett, H. B. (under review). Action biases in limb location in normal and brain lesion subjects: Behavioral and anatomic analyses.

*Medina, J., *Jax, S.A., & Coslett, H.B. (under review). Transcranial magnetic stimulation of the posterior intraparietal sulcus disrupts the integration of sensory prediction errors during visuomotor rotation learning. * = The first two authors contributed equally to this work

*Palluel-Germain, R., *Jax, S. A., & Buxbaum, L. J. (under review). Visuo-motor gain adaptation and generalization following left hemisphere stroke. * = The first two authors contributed equally to this work

 

WORKS IN PREPARATION

Jax, S. A. (in preparation). Force production learning following stroke.

Jax, S. A., & Buxbaum, L. J. (in preparation). Response interference between functional and structural actions linked to the same familiar object is increased in apraxia.

Jax, S. A., Coslett, H. B., & Buxbaum, L. J. (in preparation). Disrupted visuomotor rotation learning following left hemisphere cortical and cerebellar stroke.

Medina, J., Jax, S.A., & Coslett, H.B. (in preparation). Role of visual guidance in reaching after right intraparietal sulcus resection.

 

PRESENTATIONS (LAST 5 YEARS)

Medina, J., Jax, S.A., & Coslett, H.B. (2010, May). Role of visual guidance in reaching after right intraparietal sulcus resection. Poster presented at the Meeting of the Vision Science Society, Naples, Florida.

Jax, S.A., & Buxbaum, L. J. (2010, April). Response interference between functional and structural actions linked to the same familiar object is increased in patients with ideomotor apraxia. Poster presented at the 17th Annual Meeting of the Cognitive Neuroscience Society, Montreal, Canada.

Vaughan, J., Barany, D. A., Sali, A. W., Jax, S. A. & Rosenbaum, D. A. (2010, March). Shaping movements. Talk presented at New England Sequence and Timing, New Haven, CT.

Vaughan, J., Barany, D. A., Sali, A. W., Jax, S. A. & Rosenbaum, D. A. (2009, November). Movement time when circumventing obstacles in a 3-D workspace. Poster presented at the 50th Annual Meeting of the Psychonomic Society, Boston, MA.

Medina, J., Jax, S.A., & Coslett, H.B. (2009, October).  The neural correlates of kinematic motor learning: a transcranial magnetic stimulation study. Poster presented at the 39th Annual Meeting of the Society for Neuroscience, Chicago, IL.

Buxbaum, L. J., Schwartz, M. F., & Jax, S. A.  (2009, October). Action knowledge mediates artifact naming. Poster presented at the 1st Neurobiology of Language conference, Chicago, IL.

Jax, S. A., Medina, J., & Coslett, H. B. (2009, April). Disrupted generalization of visuomotor rotation learning following cerebellar stroke. Poster presented at the 19th meeting of the Society for the Neural Control of Movement, Waikoloa, Hawaii.

Kapur, P., Premakumar, S., Jax, S. A., Buxbaum, L. J., Dawson, A. M., & Kuchenbecker, K. J. (2009, March). Vibrotactile feedback system for intuitive upper-limb rehabilitation. Demonstration presented at the 3rd World Haptics conference, Salt Lake City, Utah.

Palluel-Germain, R., Jax, S. A., & Buxbaum, L. J. (2007, November). Multiple internal models guide visuomotor adaptation: Evidence from optic ataxia. Poster presented at the 37th meeting of the Society for Neuroscience, San Diego, CA.

Jax, S. A., Buxbaum, L. J., & Palluel-Germain, R. (2007, November). Disrupted learning, generalization, after-effects, and relearning of visuomotor rotations following left hemisphere stroke. Poster presented at the 37th meeting of the Society for Neuroscience, San Diego, CA.

Medina, J., Coslett, H. B., & Jax, S. A. (2007, August) Reaching to moving targets after deafferentation. Poster presented at the 6th Progress in Motor Control conference, Santos, Brazil.

Jax, S. A., Coslett, H. B., Lie, E., & Buxbaum, L. J. (2007, May). Disrupted visuomotor transformations into head- and body-centered coordinates in optic ataxia. Poster presented at the 14th Annual Meeting of the Cognitive Neuroscience Society, New York, NY.

Medina, J., Jax, S. A., Faseyitan, O. K., & Coslett, H. B. (2007, May) Representing effector location: Contributions of predicted state and sensory state information. Poster presented at the 14th Annual Meeting of the Cognitive Neuroscience Society, New York, NY.

Vaughan, J., Jax, S. A., & Rosenbaum, D. A. (2006, November). Extending and evaluating the posture-based model of motion planning. Talk presented at the 47th Annual Meeting of the Psychonomic Society, Houston, TX.

Jax, S. A., & Buxbaum, L. J. (2006, October). Interference in planning hand postures for grasp and skilled use of objects. Talk presented at the 36th meeting of the Society for Neuroscience, Atlanta, GA.

van der Wel, P. R. D., Fleckenstein, R., Jax, S. A., & Rosenbaum, D. A. (2006, October). Persistence of spatio-temporal forms in a sequential reaching task. Poster presented at the 36th meeting of the Society for Neuroscience, Atlanta, GA.

Vaughan, J., Klein Breteler, M. D., Rosenbaum, D. A., Meulenbroek, R. G. J., Jax,  S. A., Lantz, K., Kudurshian, A., & Godleski, S. (2005, December). Manipulating objects around obstacles: The extended posture-based model. Talk presented at the Workshop on Object Manipulation: From A Perception-Action Perspective, Nijmegen, Netherlands.

Jax, S. A., Buxbaum, L. J., & Moll, A. D. (2005, November). Deficits in coding relative positions of body parts in ideomotor apraxia. Poster presented at the 35th meeting of the Society for Neuroscience, Washington, DC.

Jax, S. A., & Rosenbaum, D. A. (2005, August). Sequential effects in obstacle avoidance: Evidence for reuse of movement plans. Poster presented at the 5th Progress in Motor Control conference. State College, PA.

van der Wel, R. P. R. D., Fleckenstein, R., Jax, S. A., & Rosenbaum, D. A. (2005, August). Anticipatory and perseveratory effects in obstacle avoidance. Poster presented at the 5th Progress in Motor Control conference, State College, PA.

Vaughan, J., Klein-Breteler, M., Rosenbaum, D. A., Meulenbroek, R. J. G., Jax, S. A., Lantz, K., Kudurshian, A., & Godleski, S. (2005, August). Generating trajectories in 3-D workspaces using goal postures and bounce postures. Poster presented at the 5th Progress in Motor Control conference, State College, PA.

Biddle, J., Cohen, R. G., Fleckenstein, R., Jax, S. A., van der Wel, R., & Rosenbaum, D. A. (2005, March). Reaching around obstacles. Talk presented at New England Sequence and Timing, New Haven, CT.