Morphology of the Myenteric Plexus during the Postnatal Development of the Rat Gastrointestinal Tract. A Structural Study Using the Champy-Maillet(ZIO) Method.

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  • SUZUKI Michiko
    Department of Food and Nutrition, Yamanashi Gakuin Junior College

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  • ラット消化管の生後発達過程の筋層間神経叢の形態　Ｃｈａｍｐｙ‐Ｍａｉｌｌｅｔ（ＺＩＯ）法による構造の研究
  • ラット ショウカカン ノ セイゴ ハッタツ カテイ ノ キン ソウカン シンケ
  • A Structural Study Using the Champy-Maillet (ZIO) Method
  • Champy-Maillet (ZIO) 法による構造の研究

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Abstract

The morphology of the myenteric plexus of the gastrointestinal tract during postnatal development was examined in the stomach and small intestine of newborn (about 6h after birth), 2-, 6- and 12-week-old rats using the Champy-Maillet (ZIO) method. The myenteric plexus was distributed continuously from the stomach to the ileum, even in pups immediately after birth. In particular, the network pattern of the myenteric plexus in the pylorus was denser than that in the small intestine. In the newborn rat, however, the outline of the nuclei of the enteroglial cells and ganglionic cells in the ganglion was not clear. The interstitial spaces of the network in the myenteric plexus enlarged with postnatal development of the gut, and then a compact autonomic ground plexus was constructed after repeated elongation and branching of the enteroneuronal processes.

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