Several excellent monographs exist which deal with axons. These, however, focus either on the cellular and molecular biology of axons proper or on network organization of connections, the latter with only an incidental or abstract reference to axons per se. Still relatively neglected, however, is the middle ground of terminations and trajectories of single axons in the mammalian central nervous system. This middle level of connectivity, between networks on the one hand and local, in vitro investigations on the other, is to some extent represented by retrograde tracer studies and labeled neurons, but there have so far been many fewer of the complementary anterograde studies, with total visualization of the axonal arborization.
The present volume brings together in one source an interrelated treatment of single axons from the perspective of microcircuitry and as substrates of larger scale organization (tractography). Especially for the former area - axons in microcircuitry - an abundance of published data exists, but these are typically in specialty journals that are not often accessed by the broader community. By highlighting and unifying the span from microcircuitry to tractography, the proposed volume serves as a convenient reference source and in addition inspires further interactions between what currently tend to be separate communities. The volume also redresses the imbalance between in vitro/local connectivity and long-distance connections.
Focusing on mammalian systems, Part 1 of this book is devoted to anatomical investigations of connections at the single axon level, drawing on modern techniques and classical methods from the 1990s. A particular emphasis is on broad coverage of cortical and subcortical connections from different species, so that common patterns of divergence, convergence, and collateralization can be easily appreciated. Part 2 addresses mechanisms of axon guidance, as these seem particularly relevant to pathways and branching patterns. Part 3 covers axon dynamics and functional aspects; and Part 4 focuses on tractography, notably including comparisons between histological substrates and imaging.
- A novel innovative reference on the axon as a connectional unit, encompassing microcircuitry, axon guidance, and function
- Featuring chapters from leading researchers in the field
- Full-colour text that includes both an overview of axon function and the multiple underlying molecular mechanisms
- The only volume to bring together the configuration of individual axons at a circuit level and to relate the histological geometry of axons and axon bundles to in vivo tractography imaging studies
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Microcircuitry 1. Axonal projection of olfactory bulb tufted and mitral cells to olfactory cortex 2. The Primate Basal Ganglia Connectome as Revealed by Single-Axon Tracing 3. Comparative analysis of the axonal collateralization patterns of basal ganglia output nuclei in the rat 4. Anatomy and Development of Multi-specific Thalamocortical Axons: Implications for cortical dynamics and evolution 5. Geometrical structure of single axons of visual corticocortical connections in the mouse 6. Inter-Areal Connections of the Macaque Cortex: How neocortex talks to itself 7. Functional topography of cortico-cortical connections 8. Do lateral intrinsic and callosal axons have comparable actions in early visual areas? 9. Neuronal Cell Types in the Neocortex 10. Anterograde viral tracer methods
Axon dynamics 11. In vivo visualization of single axons and synaptic remodeling in normal and pathological conditions 12. Contribution of axons to short-term dynamics of neuronal communication
Axon guidance 13. Organization of Axons in Their Tracts 14. Cortical architecture, midline guidance, and tractography of 3-D white matter tracts
Tractography 15. The diameters of cortical axons and their relevance to neural computing 16. Critical Review and comparison of axonal structures in MRI/DTI and histology 17. Neuroanatomical techniques for analysis of axonal trajectories in the cerebral cortex of the rhesus monkey 18. High-resolution fiber and fiber tract imaging using polarized light imaging in the human, monkey, rat and mouse brain
Dr. Kathleen Rockland is Research Professor of Anatomy and Neurobiology at Boston University School of Medicine and Visiting Professor at Cold Spring Harbor Laboratory. Prior to this, she held academic professorships at the University of Iowa and at the RIKEN Brain Science Institute in Wako, Japan focusing on single axon analysis of long-distance cortical connections in monkey. She holds editorial positions with both the Journal of Comparative Neurology and Frontiers in Neuroanatomy. A leader in the field, she has multiple publications in single axon connectivity.