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・ Segmental blood pressure
・ Segmental bridge
・ Segmental duplication
・ Segmental innervation
・ Segmental medullary artery
・ Segmental odontomaxillary dysplasia
・ Segmental resection
・ Segmental stabilizers
・ Segmentary lineage
・ Segmentation
・ Segmentation (biology)
・ Segmentation and Reassembly
・ Segmentation contractions
・ Segmentation fault
・ Segmentation gene
Segmentation in the human nervous system
・ Segmentation Rules eXchange
・ Segmentation-based object categorization
・ Segmented arch
・ Segmented filamentous bacteria
・ Segmented file transfer
・ Segmented Hyper Graphics
・ Segmented mirror
・ Segmented regression
・ Segmented scan
・ Segmented sleep
・ Segmented spindle
・ Segmented turning
・ Segmentina
・ Segmentina nitida


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Segmentation in the human nervous system : ウィキペディア英語版
Segmentation in the human nervous system
Segmentation is the physical characteristic by which the human body is divided into repeating subunits called segments arranged along a longitudinal axis. In humans, the segmentation characteristic that is observed in the nervous system is of biological and evolutionary significance.〔 Segmentation is a crucial developmental process involved in the patterning and segregation of groups of cells with different features, generating regional properties for such cell groups and organizing them both within the tissues as well as along the embryonic axis.〔Alexander, T., Nolte, C., & Krumlauf, R. (2009). Hox Genes and Segmentation of the Hindbrain and Axial Skeleton. Annual Review of Cell and Developmental Biology, 25, 431-456. doi: 10.1146/annurev.cellbio.042308.113423〕
== Introduction ==
Human nervous system consists of the central nervous system (CNS), which comprises the brain and spinal cord, and the peripheral nervous system (PNS) comprising the nerve fibers that branch off from the spinal cord to all parts of the body. Both parts of the nervous system are actively involved in communicating signals between various parts of the body to ensure the smooth and efficient transfer of information that controls and coordinates the movement of muscles, and regulates organ functions. Neurons, which form the elemental unit of the nervous system, receive messages from their dendrites, relay the information as an electrical signal down the axon and releases chemical messengers known as neurotransmitters, thus converting the electrical signal into a chemical signal.〔Fahrbach, S. E. (2013). Developmental Neuroscience: A Concise Introduction: Princeton University Press 〕

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