Learning mechanisms in the temporal lobe visual cortex

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Abstract

Neurophysiological experiments are described which show that neurons form ensemble encoded representations of stimuli such as faces which are relatively invariant with respect to size, contrast, spatial frequency, translation, and view. It is shown that new representations of objects can be formed with less than 5 s of visual experience with those objects. Mechanisms by which the brain could perform this invariant recognition, and learn the representations required for recognition, are described. A neural network simulation of these mechanisms for learning invariant representations is then described. The model uses a multistage feed-forward architecture, and is able to learn invariant representations of objects including faces by use of a Hebbian synaptic modification rule which incorporates a short memory trace (0.5 s) of preceding activity. This trace rule enables the network to learn the properties of objects which are spatio-temporally invariant over this time scale.

References (50)

  • E.T. Rolls et al.

    Processing speed in the cerebral cortex, and the neurophysiology of visual backward masking

  • K. Tanaka et al.

    Integration of form, texture, and color information in the inferotemporal cortex of the macaque

  • J.S. Baizer et al.

    Organization of visual inputs to the inferior temporal and posterior parietal cortex in macaques

    J. Neurosci.

    (1991)
  • H.B. Barlow

    Single units and sensation: a neuron doctrine for perceptual psychology?

    Perception

    (1972)
  • H.B. Barlow

    Cerebral cortex as model builder

  • H.B. Barlow et al.

    Finding minimum entropy codes

    Neural Computat.

    (1989)
  • G.C. Baylis et al.

    Responses of neurons in the inferior temporal cortex in short term and serial recognition memory tasks

    Exp. Brain Res.

    (1987)
  • G.C. Baylis et al.

    Functional subdivisions of temporal lobe neocortex

    J. Neurosci.

    (1987)
  • A. Bennett

    Large competitive networks

    Network

    (1990)
  • D. Boussaoud et al.

    Visual topography of area TEO in the macaque

    J. Comp. Neurol.

    (1991)
  • J.A. Feldman

    Four frames suffice: a provisional model of vision and space

    Behav. Brain Sci.

    (1985)
    J.A. Feldman

    Four frames suffice: a provisional model of vision and space

    Behav. Brain Sci.

    (1985)
  • P. Foldiak

    Learning invariance from transformation sequences

    Neural Comp.

    (1991)
  • M.E. Hasselmo et al.

    The role of expression and identity in the face-selective responses of neurons in the temporal visual cortex of the monkey

    Behav. Brain Res.

    (1989)
  • C.M. Leonard et al.

    Neurons in the amygdala of the monkey with responses selective for faces

    Behav. Brain Res.

    (1985)
  • J.H.R. Maunsell et al.

    Visual processing in monkey extrastriate cortex

    Annu. Rev. Neurosci.

    (1987)
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