Cells in the Zebrafish Tectum (IMAGE) King's College London Caption These are cells in the zebrafish tectum color-coded according to how they respond to the direction or orientation of a visual stimulus. Their presynaptic inputs- the retinal ganglion cell axons -- are shown in grey Credit Nikolas Nikolaou Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.