Neural network model for extracting optic flow.

  • Tohyama K
  • Fukushima K
  • 17


    Mendeley users who have this article in their library.
  • N/A


    Citations of this article.


When we travel in an environment, we have an optic flow on the retina. Neurons in the area MST of macaque monkeys are reported to have a very large receptive field and analyze optic flows on the retina. Many MST-cells respond selectively to rotation, expansion/contraction and planar motion of the optic flow. Many of them show position-invariant responses to optic flow, that is, their responses are maintained during the shift of the center of the optic flow. It has long been suggested mathematically that vector-field calculus is useful for analyzing optic flow field. Biologically, plausible neural network models based on this idea, however, have little been proposed so far. This paper, based on vector-field hypothesis, proposes a neural network model for extracting optic flows. Our model consists of hierarchically connected layers: retina, V1, MT and MST. V1-cells measure local velocity. There are two kinds of MT-cell: one is for extracting absolute velocities, the other for extracting relative velocities with their antagonistic inputs. Collecting signals from MT-cells, MST-cells respond selectively to various types of optic flows. We demonstrate through a computer simulation that this simple network is enough to explain a variety of results of neurophysiological experiments.

Author-supplied keywords

  • Algorithms
  • Animals
  • Computer Simulation
  • Macaca
  • Models, Neurological
  • Neural Networks (Computer)
  • Photic Stimulation
  • Signal Detection, Psychological
  • Temporal Lobe
  • Temporal Lobe: physiology
  • Vision, Ocular
  • Vision, Ocular: physiology
  • Visual Fields
  • Visual Fields: physiology

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • Kazuya Tohyama

  • Kunihiko Fukushima

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free