Intracellular measurements of spatial integration and the MAX operation in complex cells of the cat primary visual cortex

Intracellular measurements of spatial integration and the MAX operation in complex cells of the cat primary visual cortex (2004)

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by Ilan Lampl , David Ferster , Tomaso Poggio , Maximilian Riesenhuber , David Ferster , Tomaso Poggio

Venue:	J. Neurophys
Citations:	22 - 13 self

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@ARTICLE{Lampl04intracellularmeasurements,
    author = {Ilan Lampl and David Ferster and Tomaso Poggio and Maximilian Riesenhuber and David Ferster and Tomaso Poggio},
    title = {Intracellular measurements of spatial integration and the MAX operation in complex cells of the cat primary visual cortex},
    journal = {J. Neurophys},
    year = {2004},
    volume = {92},
    pages = {2704--2713}
}

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Abstract

Riesenhuber. Intracellular measurements of spatial integration and the MAX operation in complex cells of the cat primary visual cortex. J Neurophysiol 92: 2704–2713, 2004; 10.1152/jn.00060.2004. We have examined the spatial integration properties of complex cells to determine whether some of their responses can be described by a maximum operation (MAX)-like computation, as suggested by Riesenhuber and Poggio’s model of object recognition. Membrane potential was recorded from anesthetized cats while optimally oriented bars were presented, either alone or in pairs, in different parts of the cells ’ receptive field. In most cells, the membrane potential response to two bars presented simultaneously could not be predicted by the sum of the responses to individual bars. In many cells, however, the responses closely approximated a MAX-like model. That is, the response of the cell to two bars was similar to the larger of the two individual responses (“soft-MAX”). The degree of nonlinear

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