Efficient encoding of motion is mediated by gap junctions in the fly visual system
Fig 4
With GJs, the near-optimality encoding by the VS 5-6-7 triplet is robust over a wide range of signal-to-noise ratios.
(A) The information curve and the encoding efficiency of the axis of rotation by the VS 5-6-7 triplet in the IDe−Ax − Iθ−Ax plane to varying contrast levels of natural stimuli (contrast is coded by colors as shown in inset). The cases with GJs are represented by triangles and without GJs by circles. The blue curve is the same as in Fig 3. Note that for the case represented by the orange triangle (60% contrast with GJs) more information Iθ−Ax is extracted about motion and is closer to the information curve as compared to the orange, cyan and purple circles (representing 60%, 80% and 100% contrast without GJs, respectively). (B) As in (A), but using checkerboard stimuli. (C) As in (B) but with different luminance levels.