A neural model of the interaction of tectal columns in prey-catching behavior.
Building on a simple model of a tectal column as the unit of processing in the amphibian tectum, we conduct a computer analysis of the interaction of a linear array of such columns. The model suggests that the inhibitory and excitatory activity in the tectum may have three functions: 1) spatio-temporal facilitation of column activity to a moving stimulus; 2) preference for the head of the stimulus, probably to avoid possible defensive reactions of the prey; and 3) modulating the state of excitation of the column once it has produced a response. The model also shows that the spatio-temporal effects of excitation and inhibition increases the acuity of the animal to the direction of the prey, through processes similar to lateral inhibition.
D000818:Animals; D001070:Appetitive Behavior / Q000502:physiology*; D002025:Bufonidae; D003201:Computers; D004215:Distance Perception / Q000502:physiology; D005556:Form Perception / Q000502:physiology; D008959:Models, Neurological; D009039:Motion Perception / Q000502:physiology; D009474:Neurons / Q000145:classification / Q000502:physiology; D009949:Orientation / Q000502:physiology; D011235:Predatory Behavior / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology; D012160:Retina / Q000502:physiology; D012165:Retinal Ganglion Cells / Q000502:physiology; D012858:Size Perception / Q000502:physiology; D013477:Superior Colliculi / Q000502:physiology*; D014795:Visual Pathways / Q000502:physiology