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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 
 

Distribution of substance P and vasoactive intestinal polypeptide neurons in the chicken spinal cord, with notes on their postnatal development.

The distribution of substance P (SP) and vasoactive intestinal polypeptide ( VIP) was investigated by immunohistochemistry in the adult chicken spinal cord. By using colchicine treatment, populations of neurons containing either SP or VIP was observed in several regions of the spinal cord. SP neurons were found dorsal to the central canal (CC) and in lamina IV throughout the cord. However, at the thoracic level, numerous relatively larger SP perikarya were located ventral to the CC and aligned on either side of the midline. The distribution of SP fibers is very similar to that reported previously in mammals: they were mostly observed in laminae I and II, in Lissauer's tract, in the dorsolateral funiculus, and dorsal to the CC. In addition, two dense plexuses of SP fibers were noticed in lamina IV. VIP neurons were located mainly in lamina I, in the nucleus of the dorsolateral funiculus, and in the lateral portion of the neck of the dorsal horn throughout the spinal cord. At the thoracic level, many also were located lateral to the CC. Occasionally, single VIP neurons also were encountered dorsal to the CC, in laminae II-IV, and in the intermediate zone. VIP fibers were observed in similar numbers at all spinal levels, occurring mainly in laminae II (probably I) and III, dorsal to the CC, and in the intermediate zone. In addition, examination of the developing chick spinal cords showed similar results as in adult chickens.[1]

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