The document summarizes different types of nerve fibers and their properties, as well as descending motor tracts in the central nervous system. It describes fiber types based on myelination and diameter. It then discusses the pyramidal and extrapyramidal motor systems, including tracts like the corticospinal, rubrospinal, and reticulospinal tracts. It also provides an overview of the basal ganglia, including components, circuits, and the role of dopamine.
26. Corpus Striatum Corpus Striatum (Telencephalon) Striatum Pallidum Caudate Nucleus Putamen Globus Pallidus
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28. Substantial Nigra Substantia Nigra Mesencephalon Dorsal Pars compacta Ventral Pars reticularis Melanin containing neurons Dopaminergic neurons Iron-containing glial cells Serotonin and GABA
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37. Basal Ganglia Connections Red = excitatory; Black = Inhibitory Motor areas of cerebral cortex Ventrolateral thalamus Putamen Globus pallidus externus Output nuclei Subthalamic nuclei Substantia nigra compacta Lateral Activation pathways Pedunculo- Pontine nuclei Reticulospinal and Vestibulospinal pathways
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