Visual course control in flies relies on neuronal computation of object and background motion.

Selected references 10'Rourke, N. A. and Fraser, S. E. (1986) Dev. BioL 114, 265276 2 Purves, D. and Voyvodic, J. T. (1987) Trends NeuroscL 10, 398-404 3 Lichtmann, J. W., Magrassi, L. and Purves, D. (1987) J. Neurosci. 7, 1215-1222 4 Katz, L. C. (1987) J. Neurosci. 7, 1223-1249 5 Cohen, L. B. and Salzberg, B.M. (1978) Rev. Physiol. Biochem. Pharm. 83, 85-88 6 CJrinvald, A., Fine, A., Father, i. C. and Hildesheim, R. (1983) Biophys. J. 42, 195-198 7 Grinvald, A. (1985) Annu. Rev. Neurosci. 8, 263-305 8 London, J. A., Zecevic, D., Loew, L. M., Orbach, H. S. and Cohen, L. B. (1986) in Applications of Fluorescence in the Biomedical Sciences (Taylor, D. L. et al., eds), pp, 423-437, Alan R. Liss 9 Williams, D. A., Fogarty, K.E., Tsien, R.Y. and Fay, F.S. (1985) Nature 318, 558-561 10 Ross, W. N., Lewenstein-Stockbridge, L. and Stockbridge, N. L. (1986)J. Neurosci. 6, 1148-1159 11 Blasdel, G. G. and Salama, G. (1986) Nature 321,579-585 12 Grinvald, A., Lieke, E., Frosti, R. D., Gilbert, C. D. and Wiesel, T. N. (1986) Nature 324, 361-364 13 Kauer, J. S. (1988) Nature 331, 166-168 14 Breuer, A. C., Allen, R. D. and Lewis, L. J. (1981) Neurology 31, 118 15 Allen, R. D. (1985) Annu. Rev. Biophys. Chem. 14, 265-290 16 Inou6, S. (1986) Video Microscopy, Plenum Press 17 Agard, D. A. and Sedat, J. W. (1983) Nature 302,676-681 18 Hiraoka, Y., Sedat, J.W. and Agard, D.A. (1987) Science 238, 36-41 19 Minsky, M. (1957) US Patent No. 3013467 20 Egger, M. D. and Petran, M. (1967) Science 157, 305-307 21 Boyde, A. (1985) Science 230, 1270-1272 22 Brakenhoff, G. J., van der Voort, H. T. M., van Spronsen, E. A., Linnemans, W. A. M. and Nanninga, N. (1985) Nature 317,748--749 23 Carlsson, K. etal. (1985) Opt. Left. 10, 53-55 24 White, J. G., Amos, W. B. and Fordham, M. (1987) J. Cell Biol. 105, 41-48 25 Grinvald, A., Anglister, L., Freeman, J. R., Hildesheim, R. and Manker, A. (1984) Nature 308, 848-850 26 Tsien, R. Y. (1981) Nature 290, 527-528