OPTOMOTOR REACTION, LOCOMOTORY BIAS, AND REACTIVE INHIBITION IN THE MILKWEED BUG ONCOPELTUS AND THE BEETLE ZOPHOBAS.
Abstract
Reactive inhibition in a locomotory turn choice situation in the milkweed bug Oncopeltus fasciatus is shown probably to be no more than the delayed optomotor reaction which follows an induced turn. The two reactions have similar time constants of decay. Neither reaction occurs in infrared light or in blinded specimens of Oncopeltus. In two situations of open-loop optomotor feedback conditions, individual Oncopeltus often show strong turning biases. In infrared light they may walk in circles. In ordinary light on the Y maze globe they make significantly long runs of turns in a single direction. When freed in ordinary light, the same individuals do not exhibit the bias. Apparently, the optomotor reaction can correct this central error. The larvae of the beetle Zophobas rugipes do not exhibit an optomotor response. They do show a strong reactive inhibition which must therefore depend upon some other input modality. Adults of Zophobas do have an optomotor reaction, but they show reactive inhibition in turn choices even in infrared light. Locomotory reactive inhibition depends upon different input modalities in different species of insects. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1967
- Accession Number
- AD0653982
Entities
People
- Donald M. Wilson
- Ronald R. Hoy
Organizations
- SRI International