title: A higher order visual neuron tuned to the spatial amplitude spectra of natural scenes.
abstract: Animal sensory systems are optimally adapted to those features typically encountered in natural surrounds, thus allowing neurons with limited bandwidth to encode challengingly large input ranges. Natural scenes are not random, and peripheral visual systems in vertebrates and insects have evolved to respond efficiently to their typical spatial statistics. The mammalian visual cortex is also tuned to natural spatial statistics, but less is known about coding in higher order neurons in insects. To redress this we here record intracellularly from a higher order visual neuron in the hoverfly. We show that the cSIFE neuron, which is inhibited by stationary images, is maximally inhibited when the slope constant of the amplitude spectrum is close to the mean in natural scenes. The behavioural optomotor response is also strongest to images with naturalistic image statistics. Our results thus reveal a close coupling between the inherent statistics of natural scenes and higher order visual processing in insects.
authors.affiliation: Department of Neuroscience, Uppsala University, Box 593, 75124 Uppsala, Sweden.
authors.forename: Olga
authors.initials: O
authors.lastname: Dyakova
authors.affiliation: Department of Neuroscience, Uppsala University, Box 593, 75124 Uppsala, Sweden.
authors.forename: Yu-Jen
authors.initials: YJ
authors.lastname: Lee
authors.affiliation: HHMI Janelia Research Campus, 19700 Helix Drive, Ashburn, Virginia 20176, USA.
authors.forename: Kit D
authors.initials: KD
authors.lastname: Longden
authors.affiliation: Medical Physics, Department of Radiology, University Medical Center Freiburg, Breisacher Strasse 60a, 79106 Freiburg, Germany.
authors.forename: Valerij G
authors.initials: VG
authors.lastname: Kiselev
authors.affiliation: Department of Neuroscience, Uppsala University, Box 593, 75124 Uppsala, Sweden.|Anatomy and Histology, Centre for Neuroscience, Flinders University, GPO Box 2100, Adelaide, South Australia 5001, Australia.
authors.forename: Karin
authors.initials: K
authors.lastname: Nordström
mesh_terms: D000818:Animals; D004175:Diptera / Q000502:physiology*; D005583:Fourier Analysis; D009039:Motion Perception / Q000502:physiology*; D009474:Neurons / Q000502:physiology*; D010775:Photic Stimulation; D013028:Space Perception / Q000502:physiology*; D014793:Visual Cortex / Q000502:physiology; D014796:Visual Perception / Q000502:physiology