S N Baker

Summary

Affiliation: University of Cambridge
Country: UK

Publications

  1. pmc Coherent oscillations in monkey motor cortex and hand muscle EMG show task-dependent modulation
    S N Baker
    Sobell Department of Neurophysiology, Institute of Neurology, London, UK
    J Physiol 501:225-41. 1997
  2. pmc EEG oscillations at 600 Hz are macroscopic markers for cortical spike bursts
    Stuart N Baker
    Department of Anatomy, University of Cambridge, Cambridge CB2 3DY, UK
    J Physiol 550:529-34. 2003
  3. ncbi request reprint Synchronization in monkey motor cortex during a precision grip task. II. effect of oscillatory activity on corticospinal output
    Stuart N Baker
    Sobell Department of Neurophysiology, Institute of Neurology, Queen Square, London WC1N 3BG, United Kingdom
    J Neurophysiol 89:1941-53. 2003
  4. ncbi request reprint Synchronization in monkey motor cortex during a precision grip task. I. Task-dependent modulation in single-unit synchrony
    S N Baker
    Sobell Department of Neurophysiology, Institute of Neurology, London WC1N 3BG, United Kingdom
    J Neurophysiol 85:869-85. 2001
  5. ncbi request reprint Precise spatiotemporal repeating patterns in monkey primary and supplementary motor areas occur at chance levels
    S N Baker
    Sobell Department of Neurophysiology, Institute of Neurology, London WC1N 3BG, United Kingdom
    J Neurophysiol 84:1770-80. 2000
  6. ncbi request reprint The role of synchrony and oscillations in the motor output
    S N Baker
    Sobell Department of Neurophysiology, Institute of Neurology, Queen Square, London, WC1N 3BG, UK
    Exp Brain Res 128:109-17. 1999
  7. ncbi request reprint Multiple single unit recording in the cortex of monkeys using independently moveable microelectrodes
    S N Baker
    Sobell Department of Neurophysiology, Institute of Neurology, London, UK
    J Neurosci Methods 94:5-17. 1999
  8. ncbi request reprint An investigation of the intrinsic circuitry of the motor cortex of the monkey using intra-cortical microstimulation
    S N Baker
    Sobell Department of Neurophysiology, Institute of Neurology, London, UK
    Exp Brain Res 123:397-411. 1998
  9. ncbi request reprint Human cortical muscle coherence is directly related to specific motor parameters
    J M Kilner
    Sobell Department of Neurophysiology, Institute of Neurology, Queen Square, London WC1N 3BG, United Kingdom
    J Neurosci 20:8838-45. 2000
  10. ncbi request reprint Comparison of direct and indirect measurements of the central motor conduction time in the monkey
    E Olivier
    Sobell Department for Motor Neuroscience and Movement Disorders, Institute of Neurology, London, UK
    Clin Neurophysiol 113:469-77. 2002

Collaborators

Detail Information

Publications31

  1. pmc Coherent oscillations in monkey motor cortex and hand muscle EMG show task-dependent modulation
    S N Baker
    Sobell Department of Neurophysiology, Institute of Neurology, London, UK
    J Physiol 501:225-41. 1997
    ..They are discernable in the EMG of active muscles, and show a consistent task-dependent modulation...
  2. pmc EEG oscillations at 600 Hz are macroscopic markers for cortical spike bursts
    Stuart N Baker
    Department of Anatomy, University of Cambridge, Cambridge CB2 3DY, UK
    J Physiol 550:529-34. 2003
    ..Spike bursts were also evoked by tactile stimuli, proving that this is a natural response mode. EEG wavelets at 600 Hz may therefore permit non-invasive assessment of population spike timing in human cortex...
  3. ncbi request reprint Synchronization in monkey motor cortex during a precision grip task. II. effect of oscillatory activity on corticospinal output
    Stuart N Baker
    Sobell Department of Neurophysiology, Institute of Neurology, Queen Square, London WC1N 3BG, United Kingdom
    J Neurophysiol 89:1941-53. 2003
    ..The oscillations will therefore be effectively transmitted to spinal motoneurons, and this has important consequences for the possible role of oscillations in motor control of the hand...
  4. ncbi request reprint Synchronization in monkey motor cortex during a precision grip task. I. Task-dependent modulation in single-unit synchrony
    S N Baker
    Sobell Department of Neurophysiology, Institute of Neurology, London WC1N 3BG, United Kingdom
    J Neurophysiol 85:869-85. 2001
    ....
  5. ncbi request reprint Precise spatiotemporal repeating patterns in monkey primary and supplementary motor areas occur at chance levels
    S N Baker
    Sobell Department of Neurophysiology, Institute of Neurology, London WC1N 3BG, United Kingdom
    J Neurophysiol 84:1770-80. 2000
    ..The task dependence of pattern occurrence is explicable as an artifact of the modulation of neural firing rate. The consequences for theories of temporal coding in the cortex are discussed...
  6. ncbi request reprint The role of synchrony and oscillations in the motor output
    S N Baker
    Sobell Department of Neurophysiology, Institute of Neurology, Queen Square, London, WC1N 3BG, UK
    Exp Brain Res 128:109-17. 1999
    ..A speculative hypothesis is presented on the role of synchronous oscillations in the motor system, which is consistent with experimental observations to date...
  7. ncbi request reprint Multiple single unit recording in the cortex of monkeys using independently moveable microelectrodes
    S N Baker
    Sobell Department of Neurophysiology, Institute of Neurology, London, UK
    J Neurosci Methods 94:5-17. 1999
    ..Finally, analysis of multiple single unit recordings requires accurate methods to correct for non-stationarity in unit firing. A novel technique for such correction is discussed...
  8. ncbi request reprint An investigation of the intrinsic circuitry of the motor cortex of the monkey using intra-cortical microstimulation
    S N Baker
    Sobell Department of Neurophysiology, Institute of Neurology, London, UK
    Exp Brain Res 123:397-411. 1998
    ..It is proposed that this is likely to reflect differences in the summation of output cells to local versus remote stimulation...
  9. ncbi request reprint Human cortical muscle coherence is directly related to specific motor parameters
    J M Kilner
    Sobell Department of Neurophysiology, Institute of Neurology, Queen Square, London WC1N 3BG, United Kingdom
    J Neurosci 20:8838-45. 2000
    ..These results argue in favor of coherence between cortex and muscle being related to specific parameters of hand motor function...
  10. ncbi request reprint Comparison of direct and indirect measurements of the central motor conduction time in the monkey
    E Olivier
    Sobell Department for Motor Neuroscience and Movement Disorders, Institute of Neurology, London, UK
    Clin Neurophysiol 113:469-77. 2002
    ....
  11. ncbi request reprint Task-dependent modulations of cortical oscillatory activity in human subjects during a bimanual precision grip task
    J M Kilner
    Sobell Department of Neurophysiology, Institute of Neurology, Queen Square, London, United Kingdom
    Neuroimage 18:67-73. 2003
    ....
  12. ncbi request reprint Investigation into non-monosynaptic corticospinal excitation of macaque upper limb single motor units
    E Olivier
    Sobell Department of Neurophysiology, Institute of Neurology, University College London, London WC1N 3BG, United Kingdom
    J Neurophysiol 86:1573-86. 2001
    ..At least under the conditions that we have tested, the results provide no positive evidence for transmission of cortical excitation to upper limb motoneurons by non-monosynaptic pathways in the macaque monkey...
  13. pmc A novel algorithm to remove electrical cross-talk between surface EMG recordings and its application to the measurement of short-term synchronisation in humans
    J M Kilner
    Sobell Department of Neurophysiology, Institute of Neurology, Queen Square, London WC1N 3BG, UK
    J Physiol 538:919-30. 2002
    ..Our results show a striking difference in the task-dependent modulation of oscillatory and non-oscillatory synchrony between muscles during a dynamic precision grip task...
  14. ncbi request reprint Problem of dural scarring in recording from awake, behaving monkeys: a solution using 5-fluorouracil
    R L Spinks
    Sobell Department of Motor Neuroscience and Movement Disorders, Institute of Neurology, University College London, United Kingdom
    J Neurophysiol 90:1324-32. 2003
    ..It is also possible that this technique may be useful in other situations where there is dural scarring after surgical intervention or injury...
  15. ncbi request reprint Determination of response latency and its application to normalization of cross-correlation measures
    S N Baker
    Department of Anatomy, University of Cambridge, Cambridge CB2 3DY, UK
    Neural Comput 13:1351-77. 2001
    ..Three methods of detecting response latency are presented and their performance compared on simulated data. Finally, the effect on the JPSTH of sweep realignment using detected latencies is illustrated...
  16. pmc Cells in somatosensory areas show synchrony with beta oscillations in monkey motor cortex
    Claire L Witham
    Institute of Neuroscience, Newcastle University, Sir James Spence Building, Royal Victoria Infirmary, Queen Victoria Road, Newcastle upon Tyne NE1 4LP, UK
    Eur J Neurosci 26:2677-86. 2007
    ..Such oscillatory coupling across the central sulcus may play an important role in sensorimotor integration of both proprioceptive and cutaneous signals...
  17. pmc Muscle responses to transcranial stimulation in man depend on background oscillatory activity
    W Kyle Mitchell
    Department of Anatomy, Cambridge University, Cambridge CB2 3DY, UK
    J Physiol 583:567-79. 2007
    ..However, the majority of the variation is determined by other factors, which are not accessible by noninvasive recordings...
  18. pmc Bilateral representation in the deep cerebellar nuclei
    Demetris S Soteropoulos
    Institute of Neuroscience, Newcastle University, Sir James Spence Building, Royal Victoria Infirmary, Queen Victoria Road, Newcastle upon Tyne NE1 4LP, UK
    J Physiol 586:1117-36. 2008
    ..This places the cerebellum in an ideal position to coordinate bilateral movements...
  19. pmc Network oscillations and intrinsic spiking rhythmicity do not covary in monkey sensorimotor areas
    Claire L Witham
    Newcastle University, Sir James Spence Institute, Royal Victoria Infirmary, Newcastle upon Tyne NE1 4LP, UK
    J Physiol 580:801-14. 2007
    ..These results suggest that intrinsic rhythmicity is not required for the generation and maintenance of oscillatory activity...
  20. ncbi request reprint Digit displacement, not object compliance, underlies task dependent modulations in human corticomuscular coherence
    C Nicholas Riddle
    Department of Anatomy, University of Cambridge, Cambridge, CB2 3DY, UK
    Neuroimage 33:618-27. 2006
    ..We speculate that corticomuscular coherence may reflect a sensorimotor recalibration, providing updated information about system state following movement...
  21. ncbi request reprint Afferent encoding of central oscillations in the monkey arm
    Stuart N Baker
    University of Newcastle upon Tyne, Sir James Spence Institute, Royal Victoria Infirmary, Queen Victoria Road, Newcastle upon Tyne, NE1 4LP, United Kingdom
    J Neurophysiol 95:3904-10. 2006
    ..Oscillations are known to appear in muscle activity; their presence in afferent firing as well implies that central oscillations pass around a peripheral feedback loop and may be involved in sensorimotor integration...
  22. ncbi request reprint Measurement of time-dependent changes in the irregularity of neural spiking
    Ronnie M Davies
    The Clinical School, Addenbrooke s Hospital, Cambridge, United Kingdom
    J Neurophysiol 96:906-18. 2006
    ..Such irregularity modulation could have important consequences for the response of downstream neurons and may provide insight into the nature of the cortical code...
  23. ncbi request reprint Cortico-cerebellar coherence during a precision grip task in the monkey
    Demetris S Soteropoulos
    University of Newcastle, Sir James Spence Institute, Royal Victoria Infirmary, Newcastle upon Tyne, United Kingdom
    J Neurophysiol 95:1194-206. 2006
    ..The extensive oscillatory synchronization observed between cerebellum and motor cortex may have functional importance in sensorimotor processing...
  24. pmc Manipulation of peripheral neural feedback loops alters human corticomuscular coherence
    C Nicholas Riddle
    Department of Anatomy, University of Cambridge, Cambridge CB2 3DY, UK
    J Physiol 566:625-39. 2005
    ..The data rather suggest that afferent feedback pathways may also play a role in the genesis of corticomuscular coherence...
  25. ncbi request reprint The effect of carbamazepine on human corticomuscular coherence
    C Nicholas Riddle
    Department of Anatomy, University of Cambridge, Cambridge CB2 3DY, UK
    Neuroimage 22:333-40. 2004
    ..We show here that CBZ raises coherence without altering EEG power. This pharmacological dissociation may indicate an important role for corticomuscular coherence in motor control...
  26. pmc Post-spike distance-to-threshold trajectories of neurones in monkey motor cortex
    Daniel Z Wetmore
    Neuroscience Graduate Program, Stanford University School of Medicine, Stanford, CA 94305, USA
    J Physiol 555:831-50. 2004
    ..This could act to enhance synchronized oscillatory discharge among populations of cells at functionally relevant frequencies...
  27. ncbi request reprint Synchrony between neurons with similar muscle fields in monkey motor cortex
    Andrew Jackson
    Sobell Department of Motor Neuroscience and Movement Disorders, Institute of Neurology, UCL, London WC1N 3BG, United Kingdom
    Neuron 38:115-25. 2003
    ..We conclude that synchrony in motor cortex engages networks of neurons directly controlling the same muscle set, while inhibitory connections exist between neuronal populations with opposing output effects...
  28. pmc The effect of diazepam on motor cortical oscillations and corticomuscular coherence studied in man
    Mark R Baker
    Department of Anatomy, University of Cambridge, Cambridge CB2 3DY, UK
    J Physiol 546:931-42. 2003
    ..The relative constancy of coherence even when the amplitude of cortical oscillations is perturbed suggests that corticomuscular coherence itself may have a functional role in motor control...
  29. ncbi request reprint Task-dependent intermanual coupling of 8-Hz discontinuities during slow finger movements
    Clary M B Evans
    Department of Anatomy, University of Cambridge, Downing Street, Cambridge CB2 3DY, UK
    Eur J Neurosci 18:453-6. 2003
    ..We conclude that the systems producing approximately 8-Hz movement discontinuities and those responsible for intermanual coupling are likely to share common neural elements...
  30. ncbi request reprint Different contributions of the corpus callosum and cerebellum to motor coordination in monkey
    Demetris S Soteropoulos
    Institute of Neuroscience, Newcastle University, Sir James Spence Building, Royal Victoria Infirmary, Newcastle upon Tyne, United Kingdom
    J Neurophysiol 98:2962-73. 2007
    ..DCN neurons with higher basal rates are better suited to control continuously variable parameters of movement...
  31. pmc Oscillatory interactions between sensorimotor cortex and the periphery
    Stuart N Baker
    Institute of Neuroscience, Newcastle University, Henry Wellcome Building, Medical School, Framlington Place, Newcastle upon Tyne, NE2 4HH, UK
    Curr Opin Neurobiol 17:649-55. 2007
    ..Somatosensory cortex has strong beta-band oscillations, which are synchronised with those in motor cortex, allowing oscillatory sensory reafference to be interpreted in the context of the oscillatory motor command which produced it...