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In vertebrates, the nervous system is segregated into the internal structure of the brain and spinal cord (together called the central nervous system, or CNS) and the routes of the nerves that connect to the rest of the body (known as the peripheral nervous system, or PNS).
The delineation of distinct structures and regions of the nervous system has been critical in investigating how it works.
After Alcmaeon’s findings, many scientists, philosophers, and physicians from around the world continued to contribute to the understanding of neuroanatomy, notably: Galen, Herophilus, Rhazes and Erasistratus.
This immensely increases the capacity of researchers to distinguish between different cell types (such as neurons and glia) in various regions of the nervous system.
The term sagittal refers etymologically to the median suture between the right and left parietal bones of the cranium, known classically as sagittal suture, because it looks roughly like an arrow by its confluence with other sutures (sagitta; arrow in Latin).
Histochemistry uses knowledge about biochemical reaction properties of the chemical constituents of the brain (including notably enzymes) to apply selective methods of reaction to visualize where they occur in the brain and any functional or pathological changes.
For information about the typical structure of the human nervous system, see human brain or peripheral nervous system.
This article discusses information pertinent to the study of neuroanatomy.
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"Physical" is used to distinguish physical capital from human capital (a result of investment in the human agent)), circulating capital, and financial capital. "Physical capital" is fixed capital, any kind of real physical asset that is not used up in the production of a product.