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  • Title: Temporal properties of inputs to direction-selective neurons in monkey V1.
    Author: Saul AB, Carras PL, Humphrey AL.
    Journal: J Neurophysiol; 2005 Jul; 94(1):282-94. PubMed ID: 15744011.
    Abstract:
    Motion in the visual scene is processed by direction-selective neurons in primary visual cortex. These cells receive inputs that differ in space and time. What are these inputs? A previous single-unit recording study in anesthetized monkey V1 proposed that the two major streams arising in the primate retina, the M and P pathways, differed in space and time as required to create direction selectivity. We confirmed that cortical cells driven by P inputs tend to have sustained responses. The M pathway, however, as assessed by recordings in layer 4Calpha and from cells with high contrast sensitivity, is not purely transient. The diversity of timing in the M stream suggests that combinations of M inputs, as well as of M and P inputs, create direction selectivity.
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