First-order and second-order motion: neurological evidence for neuroanatomically distinct systems.

@article{Vaina2004FirstorderAS,
  title={First-order and second-order motion: neurological evidence for neuroanatomically distinct systems.},
  author={Lucia M. Vaina and Sergei Soloviev},
  journal={Progress in brain research},
  year={2004},
  volume={144},
  pages={197-212}
}
An unresolved issue in visual motion perception is how distinct are the processes underlying 'first-order' and 'second-order' motion. The former is defined by spatio-temporal variations of luminance and the latter by spatio-temporal variations in other image attributes such as contrast or depth, for example. Using neuroimaging and psychophysics we present data from four neurological patients with unilateral and mostly cortical infarcts, which strongly suggest that first- and second-order motion… CONTINUE READING