Dr. Tessa Montague, Columbia University, USA
Dr. Tessa Montague, Postdoctoral Fellow at the Zuckerman Mind Brain Behavior Institute at Columbia University, will present: "The neural basis of cuttlefish camouflage"
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Cuttlefish are coleoid cephalopods that dynamically change the color, pattern and texture of their skin to camouflage with their surroundings. Camouflage is achieved by expanding and contracting pigment-filled saccules in the skin called chromatophores, through the action of motor neurons that project from the brain. Thus, the patterning of the skin is a physical manifestation of neural activity in the brain. We are using this system to understand how the physical properties of the visual world are represented by patterns of neural activity in the brain, and how this representation is transformed into an approximation of the physical world on the skin. We have performed a series of experiments to develop the dwarf cuttlefish, Sepia bandensis, as a model to investigate the neural basis of camouflage. We have described the stages of embryonic development, sequenced the genome and neural transcriptome, completed a 3D brain atlas, and developed a visually-evoked camouflage behavioral paradigm. Furthermore, we are generating transgenic cuttlefish that express genetically-encoded calcium indicators and light-activated channels, permitting the live imaging and manipulation of neural activity. These technologies should permit us to simultaneously record neural activity and measure behavior to uncover how visual information is deconstructed in the brain, and then reconstructed into an image of the physical world on the skin.