K O Johnson

Summary

Affiliation: Johns Hopkins University
Country: USA

Publications

  1. ncbi request reprint Tactile functions of mechanoreceptive afferents innervating the hand
    K O Johnson
    Zanvyl Krieger Mind Brain Institute and Department of Neuroscience, Johns Hopkins University, Baltimore, Maryland 21218, USA
    J Clin Neurophysiol 17:539-58. 2000
  2. pmc Neural coding and the basic law of psychophysics
    Kenneth O Johnson
    Krieger Mind Brain Institute and Neuroscience Department, Johns Hopkins University, Baltimore, Maryland 21218, USA
    Neuroscientist 8:111-21. 2002
  3. pmc Time-course of vibratory adaptation and recovery in cutaneous mechanoreceptive afferents
    Y Y Leung
    Krieger Mind Brain Institute, Baltimore, MD 21218, USA
    J Neurophysiol 94:3037-45. 2005
  4. pmc SA1 and RA afferent responses to static and vibrating gratings
    S J Bensmaia
    Mind Brain Institute, Johns Hopkins University, 3400 N Charles St, Krieger 338, Baltimore, MD 21218, USA
    J Neurophysiol 95:1771-82. 2006
  5. ncbi request reprint Neural coding mechanisms underlying perceived roughness of finely textured surfaces
    T Yoshioka
    Zanvyl Krieger Mind Brain Institute, Departments of Neuroscience and Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA
    J Neurosci 21:6905-16. 2001
  6. pmc Temporal factors in tactile spatial acuity: evidence for RA interference in fine spatial processing
    S J Bensmaia
    Mind Brain Institute, Johns Hopkins University, Baltimore, MD 21218, USA
    J Neurophysiol 95:1783-91. 2006
  7. ncbi request reprint Spatial and temporal structure of receptive fields in primate somatosensory area 3b: effects of stimulus scanning direction and orientation
    J J DiCarlo
    Krieger Mind Brain Institute, Departments of Neuroscience and Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA
    J Neurosci 20:495-510. 2000
  8. pmc The human thalamic somatic sensory nucleus [ventral caudal (Vc)] shows neuronal mechanoreceptor-like responses to optimal stimuli for peripheral mechanoreceptors
    N Weiss
    Department of Neurosurgery, Meyer Bldg 7 113, Johns Hopkins Hospital, 600 North Wolfe St, Baltimore, MD 21287 7713, USA
    J Neurophysiol 101:1033-42. 2009
  9. ncbi request reprint Differences in spatial acuity between digits
    F Vega-Bermudez
    Zanvyl Krieger Mind Brain Institute, Johns Hopkins University, Baltimore, MD 21218, USA
    Neurology 56:1389-91. 2001
  10. ncbi request reprint Synchrony: a neural correlate of somatosensory attention
    A Roy
    Zanvyl Krieger Mind Brain Institute, Johns Hopkins University, Baltimore, MD 21218, USA
    J Neurophysiol 98:1645-61. 2007

Research Grants

  1. CORTICAL PROCESSING OF TACTUAL SPATIAL INFORMATION
    Kenneth Johnson; Fiscal Year: 1992
  2. CORTICAL PROCESSING OF TACTUAL SPATIAL INFORMATION
    Kenneth Johnson; Fiscal Year: 2002
  3. THREE-DIMENSIONAL TACTILE AND VISUAL FORM PERCEPTION
    Kenneth Johnson; Fiscal Year: 2003
  4. CORTICAL PROCESSING OF TACTUAL SPATIAL INFORMATION
    Kenneth Johnson; Fiscal Year: 1993
  5. Cortical Processing of Tactual Spacial Information
    Kenneth Johnson; Fiscal Year: 2004

Collaborators

Detail Information

Publications22

  1. ncbi request reprint Tactile functions of mechanoreceptive afferents innervating the hand
    K O Johnson
    Zanvyl Krieger Mind Brain Institute and Department of Neuroscience, Johns Hopkins University, Baltimore, Maryland 21218, USA
    J Clin Neurophysiol 17:539-58. 2000
    ..They also review the role of proprioceptive afferents in the perception of hand conformation because they appear to play a significant role along with cutaneous afferents...
  2. pmc Neural coding and the basic law of psychophysics
    Kenneth O Johnson
    Krieger Mind Brain Institute and Neuroscience Department, Johns Hopkins University, Baltimore, Maryland 21218, USA
    Neuroscientist 8:111-21. 2002
    ..The results, which are independent of any assumptions about the form of the psychophysical law, support the idea that the basic law of psychophysics is linearity between subjective experience and the neural activity on which it is based...
  3. pmc Time-course of vibratory adaptation and recovery in cutaneous mechanoreceptive afferents
    Y Y Leung
    Krieger Mind Brain Institute, Baltimore, MD 21218, USA
    J Neurophysiol 94:3037-45. 2005
    ....
  4. pmc SA1 and RA afferent responses to static and vibrating gratings
    S J Bensmaia
    Mind Brain Institute, Johns Hopkins University, 3400 N Charles St, Krieger 338, Baltimore, MD 21218, USA
    J Neurophysiol 95:1771-82. 2006
    ..The behavioral consequences of these neurophysiological findings are examined in a companion paper...
  5. ncbi request reprint Neural coding mechanisms underlying perceived roughness of finely textured surfaces
    T Yoshioka
    Zanvyl Krieger Mind Brain Institute, Departments of Neuroscience and Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA
    J Neurosci 21:6905-16. 2001
    ....
  6. pmc Temporal factors in tactile spatial acuity: evidence for RA interference in fine spatial processing
    S J Bensmaia
    Mind Brain Institute, Johns Hopkins University, Baltimore, MD 21218, USA
    J Neurophysiol 95:1783-91. 2006
    ..Consistent with this hypothesis, we found that adapting RA afferent fibers improved spatial acuity, as gauged by GOTs, at the high flutter frequencies...
  7. ncbi request reprint Spatial and temporal structure of receptive fields in primate somatosensory area 3b: effects of stimulus scanning direction and orientation
    J J DiCarlo
    Krieger Mind Brain Institute, Departments of Neuroscience and Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA
    J Neurosci 20:495-510. 2000
    ..Both orientation sensitivity and this ratio were stronger in the supragranular and infragranular layers than in layer IV...
  8. pmc The human thalamic somatic sensory nucleus [ventral caudal (Vc)] shows neuronal mechanoreceptor-like responses to optimal stimuli for peripheral mechanoreceptors
    N Weiss
    Department of Neurosurgery, Meyer Bldg 7 113, Johns Hopkins Hospital, 600 North Wolfe St, Baltimore, MD 21287 7713, USA
    J Neurophysiol 101:1033-42. 2009
    ..They are also consistent with the presence of primate thalamic elements of modality and somatotopic isorepresentation...
  9. ncbi request reprint Differences in spatial acuity between digits
    F Vega-Bermudez
    Zanvyl Krieger Mind Brain Institute, Johns Hopkins University, Baltimore, MD 21218, USA
    Neurology 56:1389-91. 2001
    ..There were no significant differences between homologous fingers of the two hands. Letter recognition and grating orientation threshold measures were highly correlated...
  10. ncbi request reprint Synchrony: a neural correlate of somatosensory attention
    A Roy
    Zanvyl Krieger Mind Brain Institute, Johns Hopkins University, Baltimore, MD 21218, USA
    J Neurophysiol 98:1645-61. 2007
    ..The observed effects did not depend on details of the statistical criteria or of the time window used in the analysis...
  11. ncbi request reprint The roles and functions of cutaneous mechanoreceptors
    K O Johnson
    Zanvyl Krieger Mind/Brain Institute, 338 Krieger Hall, The Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218-2689, USA
    Curr Opin Neurobiol 11:455-61. 2001
    ..Furthermore, the receptors in each of those systems seem to be specialized for their assigned perceptual function...
  12. pmc Vibratory adaptation of cutaneous mechanoreceptive afferents
    S J Bensmaia
    Krieger Mind Brain Inst, Johns Hopkins Univ, 3400 N Charles St, Krieger Hall 338, Baltimore, MD 21218, USA
    J Neurophysiol 94:3023-36. 2005
    ..In a companion paper, we describe the time-course of vibratory adaptation and recovery for SA1, RA, and PC fibers...
  13. ncbi request reprint Automated optimal detection and classification of neural action potentials in extra-cellular recordings
    Pramodsingh H Thakur
    Zanvyl Krieger Mind Brain Institute, Johns Hopkins University, 3400 N Charles Street, Baltimore, MD 21218, USA
    J Neurosci Methods 162:364-76. 2007
    ..This algorithm provides an accurate estimate of the signal to noise ratio and provides an accurate estimate of spike times and spike shapes...
  14. pmc A dense array stimulator to generate arbitrary spatio-temporal tactile stimuli
    Justin H Killebrew
    Krieger Mind Brain Institute, Johns Hopkins University, USA
    J Neurosci Methods 161:62-74. 2007
    ..g., drifting sinusoids). We describe the hardware and software of the system, and discuss previous and prospective applications...
  15. pmc Dynamic gain changes during attentional modulation
    Arun P Sripati
    Department of Electrical and Computer Engineering, Zanvyl Krieger Mind Brain Institute, Johns Hopkins University, Baltimore, MD 21218, U S A
    Neural Comput 18:1847-67. 2006
    ..The results indicate that only a limited number of biophysical mechanisms can account for observed attentional modulation...
  16. ncbi request reprint The Helix: a multi-modal tactile stimulator for human functional neuroimaging
    John E Ingeholm
    Laboratory of Brain and Cognition, National Institute of Mental Health, NIH, Bethesda, MD 20892 1366, USA
    J Neurosci Methods 155:217-23. 2006
    ..Complex aspects of somesthesis can thus be studied independent of confounds introduced by motor activity or problems with precision, accuracy or reproducibility of stimulus delivery...
  17. pmc A continuum mechanical model of mechanoreceptive afferent responses to indented spatial patterns
    Arun P Sripati
    Zanvyl Krieger Mind Brain Institute, Johns Hopkins University, 3400 N Charles Street, Baltimore, Maryland 21218, USA
    J Neurophysiol 95:3852-64. 2006
    ..The main outcome of this study is an accurate working model of SA1 and RA afferent responses to indented spatial patterns...
  18. pmc Spatiotemporal receptive fields of peripheral afferents and cortical area 3b and 1 neurons in the primate somatosensory system
    Arun P Sripati
    Zanvyl Krieger Mind Brain Institute, Johns Hopkins University, Baltimore, Maryland 21218, USA
    J Neurosci 26:2101-14. 2006
    ....
  19. ncbi request reprint Synchrony: a neuronal mechanism for attentional selection?
    Ernst Niebur
    Zanvyl Krieger Mind Brain Institute, Johns Hopkins University, Baltimore, Maryland 21218, USA
    Curr Opin Neurobiol 12:190-4. 2002
    ..Recent experimental evidence supports this theory, by showing that changes in attentional focus increase the synchrony of neural firing in some neuron pairs and decrease it in others...
  20. ncbi request reprint Fingertip skin conformance accounts, in part, for differences in tactile spatial acuity in young subjects, but not for the decline in spatial acuity with aging
    Francisco Vega-Bermudez
    Zanvyl Krieger Mind Brain Institute, Johns Hopkins University, Baltimore, Maryland 21218, USA
    Percept Psychophys 66:60-7. 2004
    ..Consequently, skin conformance cannot account for the loss of spatial acuity reported in earlier studies and confirmed in this study. We infer that the loss must be neural in origin...
  21. ncbi request reprint Receptive field structure in cortical area 3b of the alert monkey
    James J DiCarlo
    McGovern Institute for Brain Research Department of Brain and Cognitive Sciences, M I T, Cambridge, MA, USA
    Behav Brain Res 135:167-78. 2002
    ..Both orientation sensitivity and the ratio of coincident inhibition (number 2 above) to excitation are stronger in the supra- and infragranular layers than in layer IV...
  22. ncbi request reprint Spatial acuity after digit amputation
    Francisco Vega-Bermudez
    Zanvyl Krieger Mind Brain Institute, Johns Hopkins University, Baltimore, Maryland 21218, USA
    Brain 125:1256-64. 2002
    ..As far as we could determine, the cortical expansion that is presumed to accompany digit amputation had no effect on tactile pattern recognition performance...

Research Grants24

  1. CORTICAL PROCESSING OF TACTUAL SPATIAL INFORMATION
    Kenneth Johnson; Fiscal Year: 1992
    ..The specific aim is to develop computational methods that are firmly grounded in statistical decision theory...
  2. CORTICAL PROCESSING OF TACTUAL SPATIAL INFORMATION
    Kenneth Johnson; Fiscal Year: 2002
    ..The same methods, made more powerful with the new stimulator, will be used to study neuronal responses in the remainder of S and in Sll cortex. ..
  3. THREE-DIMENSIONAL TACTILE AND VISUAL FORM PERCEPTION
    Kenneth Johnson; Fiscal Year: 2003
    ..Project 4 (von der Hyedt) concentrations on the integration of binocular and monocular and cue conflict. The core project concerns shared services, administration, and project coordination. ..
  4. CORTICAL PROCESSING OF TACTUAL SPATIAL INFORMATION
    Kenneth Johnson; Fiscal Year: 1993
    ..In all of the neurophysiological experiments the monkey's attentional state will be controlled and particular attention will be paid to laminar differences in response properties...
  5. Cortical Processing of Tactual Spacial Information
    Kenneth Johnson; Fiscal Year: 2004
    ....