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Michael J. Hawken
Neuronal mechanisms of visual perception
My main research interest is defining the role of cortical
neurons in visual processing. This work includes physiological
and anatomical studies in the primate visual pathways, mainly the
primary visual cortex. In conjunction with these physiological
studies, I collaborate in studies that relate pursuit eye movements to perceptual performance.
Our general approach is to make quantitative measurements of
visual receptive fields of cells in the visual cortex, with an aim towards the development and testing of models against quantitative data. In collaboration with Robert Shapley our recent studies have concentrated on three main areas: the generation of orientation selectivity, the coding of chromatic properties of visual neurons and the effects of the non-classical receptive field on the dynamics and selectivity of the classical receptive field.
I have a long-term interest in defining features of cortical organization
by determining the functional properties of neurons within the cortical
circuit. Recently, using the technique of juxtacellular recording, we
have been successful in labeling physiologically characterized neurons
and subsequently recovering their dendritic and axonal morphology.
E-mail: mjh@cns.nyu.edu
Representative Publications
Hawken, M.J., Shapley, R.M., Sceniak, M.P., Ringach, D.L. & Johnson, E.N. (2001)
Contrast gain, area summation and temporal tuning in primate visual cortex. In:
Vision and Attention. ed M. Jenkin & L. Harris. pp 41-62. Springer-Verlag, New
York.
Sceniak, M.P., Hawken, M.J. & Shapley, R.M. (2001) Visual spatial characterization of
macaque V1 neurons. Journal of Neurophysiology, 85, 1873-1888.
Hawken, M.J. & Gegenfurtner, K.R. (2001) Pursuit eye movements to second-order
motion targets. Journal of the Optical Society of America, 18, 2282-2296.
Johnson, E.N., Shapley, R.M. & Hawken, M.J. (2001) The spatial transformation of color
in the primary visual cortex of the macaque monkey. Nature Neuroscience, 4, 409-
416.
Paninski, L. & Hawken, M.J. (2001) Stochastic optimal control and the human
oculomotor system. Neurocomputing, 38-40, 1511-1517.
Ringach, D.L., Hawken, M.J. & Shapley R.M. (2002) Receptive field structure of
neurons in monkey primary visual cortex revealed by stimulation with natural image
sequences. Journal of Vision, 2, 12-24.
Ringach, D.L., Bredfeldt, C.E., Shapley, R.M. & Hawken, M.J. (2002) Suppression of
neural responses to non-optimal stimuli enhances tuning selectivity in macaque V1.
Journal of Neurophysiology, 87, 1018-1027.
Ringach, D.L., Shapley, R.M. & Hawken, M.J. (2002) Diversity and laminar
specialization of orientation selectivity in macaque V1. Journal of Neuroscience, 22,
5639-5651.
Shapley, R. & Hawken, M.J. (2002) Neural mechanisms for color perception in the
primary visual cortex. Current Opinion in Neurobiology, 12, 426-432
Sceniak, M.P., Hawken, M.J. & Shapley, R.M. (2002) Contrast dependent changes in
spatial frequency tuning: effects of a changing receptive field size. Journal of
Neurophysiology, 88, 1363-1373.
Ringach, D.L., Hawken, M.J. & Shapley, R.M. (2003) Dynamics of orientation tuning in
macaque V1: the role of global and tuned suppression. Journal of Neurophysiology,
90, 342 - 352.
Shapley, R.M., Hawken, M.J. & Ringach, D.L. (2003) Dynamics of orientation tuning in
primary visual cortex and the importance of cortical inhibition. Neuron 38, 689-699.
Kiorpes, L., Tang, C., Hawken, M.J. & Movshon, J.A. (2003) Ideal observer analysis of
the development of spatial contrast sensitivity in macaque monkeys. Journal of Vision
3, 630-641.
Gegenfurtner, K.R., Scott, B., Xing, D. & Hawken, M.J. (2003) A comparison of pursuit
eye movements and perecptual performance in speed discrimination. Journal of
Vision 3, 665-876.
Johnson, E.N., Hawken, M.J. & Shapley, R.M. (2004) Cone inputs in macaque primary
visual cortex. Journal of Neurophysiology 91, 2501-2514
Xing, D., Ringach, D.L., Shapley R.M. & Hawken M.J. (2004) Correlation of local and
global orientation and spatial frequency tuning in macaque V1. Journal of Physiology
557, 923-933.
Williams, P.E., Mechler, F., Gordon, J., Shapley, R.M. & Hawken, M.J. (2004)
Entrainment to video displays in primary visual cortex of macaque and humans.
Journal of Neuroscience 24: 8278-8288.
Movshon, J.A., Kiorpes, L., Hawken, M.J. & Cavanaugh, J.R. (2005) Maturation of the
macaque's lateral geniculate neurons. Journal of Neuroscience 25: 2112-2122.
Xing, D., Shapley R.M., Hawken M.J. & Ringach, D.L. (2005) The effect of stimulus
size on the dynamics of orientation selectivity in Macaque V1. Journal of
Neurophysiology 94: 799-812.
Spering, M., Kerzel, D., Braun, D.I., Hawken, M.J. & Gegenfurtner, K.R. (2005) Effects
of contrast on smooth pursuit eye movements. Journal of Vision 5: 455-465.
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