Visual system II: Motion detection in the visual system of locusts and humans

The tasks that have to be carried out by the visual system (eye and subsequent neuronal networks) are diverse. They range fron simple light / dark perception to complex spatial analyses. The visual system extracts informations about the environment from changes in the illumination of the eye. So objects are recognized as such, as well as their size and distance. In case of moving objects also speed and direction are analyzed. All these tasks arew carried out in "realtime", since it is necessary, that an animal that interacts with a complex world reacts fast, reliable and sensible to stimuli.
In migratory locusts (Locusta migratoria) the responses of movement sensitive interneurones can be easily recorded extracellularly. The response of these neurones, mainly the so called DCMD neurone, to various stimuli can be used to investigate several aspects of neuronal information processing.
In self-experiments the pupils figure out how the flicker fusion frequency of the human eye depends on the light intensity. The results are set in relation to the properties of rods and cones (photoreceptors).

Duration: 1 day
Number of participants: 16