James Ashe

Summary

Affiliation: University of Minnesota
Country: USA

Publications

  1. ncbi request reprint Cortical control of motor sequences
    James Ashe
    Brain Sciences Center, Veterans Administration Medical Center, Minneapolis, MN, USA
    Curr Opin Neurobiol 16:213-21. 2006
  2. pmc High accuracy decoding of movement target direction in non-human primates based on common spatial patterns of local field potentials
    Nuri F Ince
    Brain Sciences Center, VA Health Care System, Minneapolis, Minnesota, United States of America
    PLoS ONE 5:e14384. 2010
  3. pmc Differential effect of reward and punishment on procedural learning
    Tobias Wächter
    Brain Sciences Center, Veterans Affairs Medical Center, Minneapolis, Minnesota 55417, USA
    J Neurosci 29:436-43. 2009
  4. doi request reprint The neural substrate of predictive motor timing in spinocerebellar ataxia
    Martin Bares
    Brain Sciences Center, Veterans Affairs Medical Center, Minneapolis, MN, USA
    Cerebellum 10:233-44. 2011
  5. ncbi request reprint Strategic modulation of cognitive control
    Ovidiu V Lungu
    Veterans Affairs Medical Center, Minneapolis, MN 55417, USA
    J Cogn Neurosci 19:1302-15. 2007
  6. ncbi request reprint Lack of adaptation to random conflicting force fields of variable magnitude
    Rahul Gupta
    Brain Sciences Center, Veterans Affairs Medical Center, 11B VAMC, One Veterans Drive, Minneapolis, MN 55417, USA
    J Neurophysiol 97:738-45. 2007
  7. ncbi request reprint Frames of reference during implicit and explicit learning
    Tao Liu
    Brain Sciences Center 11B, Veterans Affairs Medical Center, One Veterans Drive, Minneapolis, MN 55417, USA
    Exp Brain Res 180:273-80. 2007
  8. ncbi request reprint On the relations between single cell activity in the motor cortex and the direction and magnitude of three-dimensional dynamic isometric force
    Jyl Boline
    Brain Sciences Center, 11B, VAMC, Minneapolis, MN 55417, USA
    Exp Brain Res 167:148-59. 2005
  9. pmc Negative covariation between task-related responses in alpha/beta-band activity and BOLD in human sensorimotor cortex: an EEG and fMRI study of motor imagery and movements
    Han Yuan
    Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455, USA
    Neuroimage 49:2596-606. 2010
  10. doi request reprint Overcoming measurement time variability in brain machine interface
    B Vikrham Gowreesunker
    University of Minnesota, Minneapolis, MN, USA
    Conf Proc IEEE Eng Med Biol Soc 2009:3134-7. 2009

Research Grants

  1. LEARNING IN THE HUMAN MOTOR CORTEX
    James Ashe; Fiscal Year: 2007
  2. Cortical control of sequential motor behavior
    James Ashe; Fiscal Year: 2005
  3. LEARNING IN THE HUMAN MOTOR CORTEX
    James Ashe; Fiscal Year: 2003

Collaborators

Detail Information

Publications20

  1. ncbi request reprint Cortical control of motor sequences
    James Ashe
    Brain Sciences Center, Veterans Administration Medical Center, Minneapolis, MN, USA
    Curr Opin Neurobiol 16:213-21. 2006
    ..The challenge for the future will be to develop a coherent and internally consistent theory of sequence control...
  2. pmc High accuracy decoding of movement target direction in non-human primates based on common spatial patterns of local field potentials
    Nuri F Ince
    Brain Sciences Center, VA Health Care System, Minneapolis, Minnesota, United States of America
    PLoS ONE 5:e14384. 2010
    ..In addition, the understanding of the relation between potentially more stable neural signals, such as local field potentials, and motor behavior is still in its early stages...
  3. pmc Differential effect of reward and punishment on procedural learning
    Tobias Wächter
    Brain Sciences Center, Veterans Affairs Medical Center, Minneapolis, Minnesota 55417, USA
    J Neurosci 29:436-43. 2009
    ..Our results suggest that reward and punishment engage separate motivational systems with distinctive behavioral effects and neural substrates...
  4. doi request reprint The neural substrate of predictive motor timing in spinocerebellar ataxia
    Martin Bares
    Brain Sciences Center, Veterans Affairs Medical Center, Minneapolis, MN, USA
    Cerebellum 10:233-44. 2011
    ..The lack of any areas with greater activity in the spinocerebellar group than in controls suggests that limited functional reorganization occurs in this condition...
  5. ncbi request reprint Strategic modulation of cognitive control
    Ovidiu V Lungu
    Veterans Affairs Medical Center, Minneapolis, MN 55417, USA
    J Cogn Neurosci 19:1302-15. 2007
    ..We suggest that having separate control mechanisms based on local or global task features allows humans to be persistent in pursuing their goals, yet flexible enough to adapt to changes in the environment...
  6. ncbi request reprint Lack of adaptation to random conflicting force fields of variable magnitude
    Rahul Gupta
    Brain Sciences Center, Veterans Affairs Medical Center, 11B VAMC, One Veterans Drive, Minneapolis, MN 55417, USA
    J Neurophysiol 97:738-45. 2007
    ..The data suggest that multiple conflicting internal models cannot be learned in all environments, and provide support for the unstable nature or limited capacity of motor memories...
  7. ncbi request reprint Frames of reference during implicit and explicit learning
    Tao Liu
    Brain Sciences Center 11B, Veterans Affairs Medical Center, One Veterans Drive, Minneapolis, MN 55417, USA
    Exp Brain Res 180:273-80. 2007
    ..Finally, explicit subjects were also able to benefit from the allocentric frame in transfer, which suggests that explicit procedural knowledge may have two tiers comprising egocentric and allocentric representations...
  8. ncbi request reprint On the relations between single cell activity in the motor cortex and the direction and magnitude of three-dimensional dynamic isometric force
    Jyl Boline
    Brain Sciences Center, 11B, VAMC, Minneapolis, MN 55417, USA
    Exp Brain Res 167:148-59. 2005
    ..Furthermore, the data suggest that the control of static and dynamic motor systems is based, to a great extent, on a common control process...
  9. pmc Negative covariation between task-related responses in alpha/beta-band activity and BOLD in human sensorimotor cortex: an EEG and fMRI study of motor imagery and movements
    Han Yuan
    Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455, USA
    Neuroimage 49:2596-606. 2010
    ..These results suggest an inverse functional coupling relationship between task-induced changes of BOLD and low-frequency EEG signals...
  10. doi request reprint Overcoming measurement time variability in brain machine interface
    B Vikrham Gowreesunker
    University of Minnesota, Minneapolis, MN, USA
    Conf Proc IEEE Eng Med Biol Soc 2009:3134-7. 2009
    ..Furthermore, we saw an increase from 86% to 90% DP with another subject which exhibited significantly less variability...
  11. doi request reprint Offline decoding of end-point forces using neural ensembles: application to a brain-machine interface
    Rahul Gupta
    Brain Sciences Center, VA Medical Center, Minneapolis, MN 55417, USA
    IEEE Trans Neural Syst Rehabil Eng 17:254-62. 2009
    ..Our results represent a useful extension of the current BMI technology, making dynamic control of a prosthetic device a distinct possibility in the near future...
  12. pmc Role of olivocerebellar system in timing without awareness
    Xiang Wu
    Department of Neurology, University of Minnesota, Minneapolis, MN 55455, USA
    Proc Natl Acad Sci U S A 108:13818-22. 2011
    ....
  13. ncbi request reprint Impaired predictive motor timing in patients with cerebellar disorders
    Martin Bares
    Brain Sciences Center, Veterans Affairs Medical Center, One Veterans Drive 11B, Minneapolis, MN 55417, USA
    Exp Brain Res 180:355-65. 2007
    ..The findings demonstrate that the cerebellum may have properties that would facilitate the processing or storage of internal models of motor behavior...
  14. ncbi request reprint Anticipatory activity in primary motor cortex codes memorized movement sequences
    Xiaofeng Lu
    Brain Sciences Center, Veterans Administration Medical Center, Minneapolis, Minnesota 55417, USA
    Neuron 45:967-73. 2005
    ..Our results challenge the role of medial motor areas in the control of well-practiced movement sequences and suggest that motor cortex contains a complete apparatus for the planning and production of this complex behavior...
  15. doi request reprint Selection of optimal programming contacts based on local field potential recordings from subthalamic nucleus in patients with Parkinson's disease
    Nuri Firat Ince
    Departments of Neurosurgery and Neuroscience, University of Minnesota, Minneapolis, Minnesota 55455, USA
    Neurosurgery 67:390-7. 2010
    ..However, DBS device programming remains difficult and is a possible source of decreased efficacy...
  16. ncbi request reprint The evaluation of preprocessing choices in single-subject BOLD fMRI using NPAIRS performance metrics
    Stephen LaConte
    Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, USA
    Neuroimage 18:10-27. 2003
    ..Among the particular analysis chains considered, we found little impact in performance metrics with alignment, some benefit with temporal detrending, and greatest improvement with spatial smoothing...
  17. ncbi request reprint Role of the olivo-cerebellar system in timing
    Duo Xu
    Neurology Service, Minneapolis Veterans Affairs Medical Center, Minneapolis, Minnesota 55417, USA
    J Neurosci 26:5990-5. 2006
    ..Our results suggest that the primary role of the inferior olive and the climbing fiber system in timing is the encoding of temporal information independent of motor behavior...
  18. ncbi request reprint Adaptation of arm trajectory during continuous drawing movements in different dynamic environments
    Tamami Fukushi
    Departments of Neuroscience and Neurology, University of Minnesota, Minneapolis, MN 55455, USA
    Exp Brain Res 148:95-104. 2003
    ..These results show that human subjects can adapt to a variety of different dynamic transformations and that the time-course of adaptation is dependent on both the state space and the direction of the load...
  19. ncbi request reprint Intelligence in action
    Matthew V Chafee
    Nat Neurosci 10:142-3. 2007
  20. ncbi request reprint The representation of explicit motor sequence knowledge
    Robert Knee
    University of Virginia, Charlottesville, Virginia 22904 4400, USA
    Mem Cognit 35:326-33. 2007
    ..This conclusion held true for both self-report measures (subjects said that they learned stimuli) and performance measures, but when stimuli changed, performance degraded. We interpret these data in a multiple-memory-systems framework...

Research Grants14

  1. LEARNING IN THE HUMAN MOTOR CORTEX
    James Ashe; Fiscal Year: 2007
    ..The work outlined here will provide a fundamental understanding of these disabilities and may lead to the development of strategies for rehabilitation and treatment of these patients. ..
  2. Cortical control of sequential motor behavior
    James Ashe; Fiscal Year: 2005
    ..abstract_text> ..
  3. LEARNING IN THE HUMAN MOTOR CORTEX
    James Ashe; Fiscal Year: 2003
    ..As much of our motor behavior is based on implicit learning it is possible that implicit learning paradigms could be used beneficially for motor rehabilitation in stroke. ..