L Medina, University of Murcia, Murcia, Spain © 2007 Elsevier Inc. All rights reserved.
1.05.1 Introduction 74
1.05.2 Conceptual Considerations 75
1.05.2.1 Causes of Homology, Convergence, and Divergence: Development, Evolution, Epigenesis 75
1.05.2.2 Internal Constraints in Development and Evolution. Epigenetic Constraints 75
1.05.2.3 The Principle of Modularity: Genetic Cascades, Cells, Cell Fields, and Organs 76
1.05.2.4 Morphogenetic Fields as Evolutionary and Developmental Higher-Order Modules
Linking Genotype and Phenotype 77
1.05.3 Field Homology: A Useful Concept in Studies of Brain Evolution 80
1.05.3.1 In Search of the Brain Archetype in Vertebrates: Developmental Regulatory Genes as Useful Tools for Deciphering the Archetype and Identifying Homologous Fields 81
1.05.3.2 Evolution of Homologous Fields in the Brain: The Case of the Pallium 82
1.05.3.3 Evolution of New Fields in the Vertebrate Brain: Analysis of the Lamprey 83
1.05.4 Conclusions 84
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