Seminar Series

Stereoscopic depth perception in humans and insects

Stereopsis is the ability to perceive depth from the small disparities between the views of the world seen by the two eyes. In this talk I’d like to share recent work from my lab addressing different aspects of this ability. I’ll begin with a general overview of stereopsis and what is known about its neural substrate. I’ll present recent work from my PhD student Zoltan Derzsi, showing how we can extract a “steady-state visual evoked potential” EEG signal specifically from the brain mechanisms involved in stereopsis. Then, I’ll move on to a very different form of stereopsis found in an insect, the praying mantis. Despite having tiny brains of only one million neurons, these visual predators can outperform humans on some stereo psychophysics tasks.