Embryonic Development of the Central Nervous System in the Cricket, Gryllus bimaculatus : II. Segmental Specialization in Late Neurogenesis

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概要

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• The formation process of the central nervous system (CNS) of the cricket embryo was investigated histologically. In early embryogenesis, the nervous system anlage shows segmental homology. Segment-specific differentiation takes place, however, and each segmental ganglion performs its own specialized function. The neuroblasts (NB_s) degenerate much more rapidly in the abdomen than in the thorax. This difference in the NB life-span causes the difference in cell number in the ganglion. The volume of neuropile (NP) in the thoracic ganglia reached ten times that formed by abdominal ones. This development of NP coincides with the inflow of sensory fibers from the periphery. The numbers of motor neurons and interganglionic interneurons and their pathways seem to be common in all ganglia. The differentiation of ganglia depends mainly on two factors, the number of neurons produced and the amount of sensory inflow.

• 社団法人日本動物学会の論文
• 1983-09-25

著者

• Miyamoto Takenori

  Zoological Insstitute Faculty Of Sciences Hokkaido University:(present Address)department Of Physiol

関連論文

• Embryonic Development of the Central Nervous System in the Cricket, Gryllus bimaculatus : I. Segmental Homologies in Early Neurogenesis
• Embryonic Development of the Central Nervous System in the Cricket, Gryllus bimaculatus : II. Segmental Specialization in Late Neurogenesis

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