First and second-order motion perception after focal human brain lesions

  title={First and second-order motion perception after focal human brain lesions},
  author={Matthew Rizzo and Mark Nawrot and Jondavid Sparks and Jeffrey E. Dawson},
  journal={Vision Research},
Perception of visual motion includes a first-order mechanism sensitive to luminance changes and a second-order motion mechanism sensitive to contrast changes. We studied neural substrates for these motion types in 142 subjects with visual cortex lesions, 68 normal controls and 28 brain lesion controls. On first-order motion, the visual cortex lesion group performed significantly worse than normal controls overall and in each hemifield, but second-order motion did not differ. Only one individual… CONTINUE READING

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