Investigating saccade programming in the praying mantis Tenodera aridifolia using distracter interference paradigms.
To investigate the saccadic system in the mantis, I applied distracter interference paradigms. These involved presenting the mantis with a fixation target and one or several distracters supposed to affect saccades towards the target. When a single target was presented, a medium-sized target located in its lower visual field elicited higher rates of saccade response. This preference for target size and position was also observed when a target and a distracter were presented simultaneously. That is, the mantis chose and fixated the target rather than a distracter that was much smaller or larger than the target, or was located above the target. Furthermore, the mantis' preference was not affected by increasing the number of distracters. However, the presence of the distracter decreased the occurrence rate of saccade and increased the response time to saccade. I conclude that distracter interference paradigms are an effective way of investigating the visual processing underlying saccade generation in the mantis. Possible mechanisms of saccade generation in the mantis are discussed.
Yamawaki
Yoshifumi
Y
Department of Biology, Faculty of Science, Kyushu University, Fukuoka 812-8581, Japan. yyamascb@mbox.nc.kyushu-u.ac.jp
D000818:Animals; D001288:Attention / Q000502:physiology*; D007564:Japan; D020050:Mantodea / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods; D012438:Saccades / Q000502:physiology*; D013647:Task Performance and Analysis; D014794:Visual Fields / Q000502:physiology