Sensory-Motor Areas and Aspects of Cortical Connectivity

1 What Makes a Map in Somatosensory Cortex?.- 1. A Statement of the Problem.- 2. A History of Mapmaking in Somatosensory Cortex.- 3. Questions Currently of Interest.- 4. The Process of Mapping: Some Practical Considerations.- 5. Biological Mapping Functions.- 6. Reorganization following Deafferentation.- 7. Organization following Nerve Regeneration.- 8. Other Clues to the Nature of Biological Mapping Functions.- 9. Summary.- 10. References.- 2 Second Somatosensory Cortex and Related Areas.- 1. Introduction: A Problem of Definitions.- 2. Somatotopic Organization in SII.- 3. The Cytoarchitecture of SII.- 4. Thalamocortical Connections.- 5. Corticocortical Connections.- 6. Corticofugal Connections.- 7. Physiological Responses.- 8. LesionBehavioral Studies.- 9. Conclusions.- 10. References.- 3 Vestibular Corte.- 1. Introduction.- 2. Parietal Cortical Projections.- 3. SI Forelimb Field Projection.- 4. Convergence.- 5. The Ascending Pathway to the Cortex.- 6. Clinical Implications.- 7. References.- 4 Connectivity of the Primate Sensory-Motor Corte.- 1. Introduction.- 2. Thalamic Inputs.- 3. Thalamocortical Connectivity.- 4. Subcortical Connections.- 5. Corticocortical Connections.- 6. Conclusions.- 7. Abbreviations.- 8. References.- 5 Functions of Corticocortical Neurons of Somatosensory, Motor, and Parietal Cortex.- 1. Introduction.- 2. Properties of Corticocortical Neurons.- 3. Effects of Corticocortical Neurons.- 4. What Information Is Carried by Corticocortical Neurons?.- 5. Conclusions.- 6. References.- 6 Motor Cortex Output in Primates.- 1. Motor Cortex Neurons and ? Motoneurons.- 2. Movements of Hand and Jaw.- 3. Transcortical Reflexes.- 4. References.- 7 Motor Cortex of Rodents.- 1. Introduction.- 2. Cortical Field Definition in Rodent Motor Cortex.- 3.InputOutput Organization of Rat Motor Cortex.- 4. Functional Specializations of Rodent Motor Cortex.- 5. Conclusions.- 6. References.- 8 Termination of Thalamic Afferents in the Cerebral Cortex.- 1. Introduction.- 2. Thalamocortical Topography.- 3. Correlations of Cortical Physiology with Thalamocortical Projections.- 4. Neurons Postsynaptic to Thalamic Afferents.- 5. Quantitative Aspects of Thalmocortical Synaptic Relations.- 6. Synaptic Sequences Involving Neurons Postsynaptic to Thalamic Afferents.- 7. Conclusions.- 8. References.- 9 General Organization of Callosal Connections in the Cerebral Cortex.- 1. Introduction.- 2. The Callosal Neurons.- 3. The Callosal Tract.- 4. The Termination of Callosal Axons.- 5. Corticotopic Organization of Callosal Connections.- 6. Function of Callosal Connections.- 7. The Development of Callosal Connections.- 8. Conclusions.- 9. References.- 10 The Thalamic Intralaminar Nuclei and the Cerebral Cortex.- 1. Historical Introduction.- 2. Cytoarchitectonic Delimitation of the Intralaminar Nuclei, with Notes on Their Comparative Anatomy.- 3. The IntralaminarCortical Projections.- 4. The Subcortical Efferents of the Intralaminar Nuclei.- 5. The Subcortical Afferents to the Intralaminar Nuclei.- 6. The Cortico-Intralaminar Projections.- 7. Functional Role of the Intralaminar System.- 8. Conclusions.- 9. References.- 11 New Perspectives on the Organization and Evolution of Nonspecific Thalamocortical Projections.- 1. Historical Origins of the Term Nonspecific Thalamus.- 2. A Tripartite Division of Thalamus Based on Cortical Layers of Termination.- 3. Evidence for a Paralaminar Layer I-Projecting System Demonstrated by Retrograde Tracing.- 4. Comparative Aspects of the Nonspecific Thalamocortical System.- 5. Cellular Origins ofLayer I Projections.- 6. Speculation on the Phylogeny of the Nonspecific Thalamus.- 7. Functional Considerations.- 8. References.- 12 Topography of Corticostriatal Projections in Nonhuman Primates and Implications for Functional Parcellation of the Neostriatum.- 1. Introduction.- 2. Early Views of Corticostriatal Projections.- 3. New Topography of Corticostriatal Projections.- 4. Segregation of Cortical Terminal