"The neurons whose activity we have recorded provide the basis for the final step – the unconscious control of eye muscles. This is the process that the researchers were able to localize in the brain. In the second, the proper eye motion is combined with this information to obtain the environmental velocity.
The necessary information processing includes essentially three steps: In the first step, the speed of a visual stimulus on the retina is calculated. Several areas of the brain are involved in the control of the optokinetic reflex. This is the information the brain ultimately requires to control eye movements. Using computer models, the researchers demonstrated that the observed distribution of signal combinations corresponds exactly to the one required to calculate the velocity of the ambient scene. This makes a great drink for a Halloween Party. Moreover, how this is done clearly differs from cell to cell – thereby enabling the generation of completely new signals. In your punch bowl, place a lot of ping pong balls that have eyes on them, sherbet, grape juice, and sprite. "By means of electrophysiological recordings, we have shown that nerve cells in the so-called MSTd area combine information about the motion of the visual stimulus on the retina with the velocity of eye movements," Lukas Brostek from LMU – first author of the study – explains.
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