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CONTENTS 1. The Development of the Drosophila Larval Brain........... 1 Volker Hartenstein, Shana Spindler, Wayne Pereanu and Siaumin Fung Abstract................................................................................................................................. 1 Synopsis of the Phases and Elements of Drosophila Brain Development........................ 1 Progenitors of the Drosophila Brain: Neuroblasts and Ganglion Mother Cells............. 3 The Generic Cell Types of the Drosophila Brain................................................................ 8 Neuroanatomy of the Developing Drosophila Brain: The Systems of Lineages, Tracts and Compartments......................................................................................... 17 Outlook............................................................................................................................... 29 2. Anteroposterior Regionalization of the Brain: Genetic and Comparative Aspects............................................. 32 Robert Lichtneckert and Heinrich Reichert Abstract............................................................................................................................... 32 Introduction........................................................................................................................ 32 The Cephalic Gap Genes Otd/Otx and Ems/Emx Control Anterior Brain Development..................................................................................................... 34 The Hox Genes Pattern the Posterior Brain..................................................................... 36 Evidence for a Tripartite Organization of the Brain....................................................... 37 3. Dorsoventral Paterning of the Brain: A Comparative Approach.................................................................. 42 Rolf Urbach and Gerhard M. Technau Abstract ............................................................................................................................... 42 Introduction........................................................................................................................ 42 DV Patterning of the Truncal Part of the CNS in Drosophila and vertebrates............ 45 DV patterning of the brain in Drosophila........................................................................ 48 A comparison with DV regionalization of the vertebrate telencephalon................... 52 Conclusions......................................................................................................................... 53 xii Contents 4. Disection of the Embryonic Brain Using Photoactivated Gene Expresion.............................................. 57 Jonathan Minden Abstract............................................................................................................................... 57 Introduction........................................................................................................................ 57 Procephalic Blastoderm Fate Map.................................................................................... 58 Brain-Forming Mitotic Domains Populate Distinct Brain Regions............................... 58 Conclusion.......................................................................................................................... 67 5. Design of the Larval Chemosensory System....................... 69 Reinhard F. Stocker Abstract ..............................................................................

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