Patricia S. Churchland (San Diego) gives a talk at the MCMP conference "Reduction and Emergence in the Sciences" (14-16 November, 2013) titled "Cross-Level Linkages in Neurobiology". Abstract: In neurobiology, an important strategy is to link high level properties, such as spatial knowledge or impulse control, to specific macro structuresand to signature neuronal activity in parts of those structures. At a deeper level, the goal is to understand that neuronal signature in the context of regional microanatomy, neuropharmacology, and basic neuronal physiology. Where possible, the companion goal is to link the structural changes during learning to gene expression. In some conditions, such as Williams syndrome, the deficits can be linked to deletion of specific genes that alter brain development. Thus techniques ranging from genetics to cellular recording to imaging to behavioral analysis are used to converge on a function with a view to explaining its neurobiological basis.