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  • Title: Is direction selectivity of cat area 17 cells always independent of contrast and dependent on short-distance interactions?
    Author: Duysens J.
    Journal: Exp Brain Res; 1987; 67(3):663-6. PubMed ID: 3653324.
    Abstract:
    In a study of area 17 of the paralysed and anesthetized cat it was found that for a small subgroup of cells with peripherally located receptive fields (11/123), the direction selectivity was critically dependent on the use of high contrast stimulation. By covering parts of the receptive field with a mask, it was found that in some cells the suppression of responses to movement in the non-preferred direction was due to the presence of a suppressive area located just outside the discharge region. Direction selective suppression was present only when a high contrast bar (light or dark) crossed this area before entering the discharge region.
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