Lavalley A L, Ho R H
J Comp Neurol. 1983 Feb 1;213(4):406-13. doi: 10.1002/cne.902130405.
The occurrence and distribution of substance P (SP), somatostatin (SOM), and enkephalin (ENK) immunoreactive elements were examined in the spinal cord of the domestic fowl, Gallus domesticus. SP immunoreactive fibers and their varicosities were densest in laminae I and II, although they were also found within deeper regions of the dorsal horn. In contrast, the intermediate gray area, the area around the central canal, and the ventral horn, contained fewer SP immunoreactive fibers. The distribution of ENK immunoreactivity in the gray matter was similar to that described for SP although immunoreactive fibers were denser around the central canal and in the intermediate zone. Few SOM immunoreactive fibers were present in the dorsal horn, the area around the central canal, and the ventral horn. All three peptidergic immunoreactive elements were found in and around the nucleus of Terni, an autonomic area. Throughout the lumbosacral enlargement SP, SOM, and ENK immunoreactive varicosities were found adjacent to the lumbosacral sinus and in fibers traversing the glycogen body. In addition, at caudal lumbar and rostral sacral levels a plexus of SP and SOM immunoreactive fibers was observed to be in close relationship with presumed motoneurons.
研究了家鸡（Gallus domesticus）脊髓中P物质（SP）、生长抑素（SOM）和脑啡肽（ENK）免疫反应性元件的发生和分布情况。SP免疫反应性纤维及其膨体在I层和II层最为密集，不过在背角较深区域也有发现。相比之下，中间灰质区、中央管周围区域以及腹角含有的SP免疫反应性纤维较少。灰质中ENK免疫反应性的分布与SP相似，尽管免疫反应性纤维在中央管周围和中间带更为密集。背角、中央管周围区域和腹角中存在的SOM免疫反应性纤维很少。在自主区域特尔尼核及其周围发现了所有三种肽能免疫反应性元件。在整个腰骶膨大处，在腰骶窦附近以及穿过糖原体的纤维中发现了SP、SOM和ENK免疫反应性膨体。此外，在腰尾段和骶前段水平，观察到SP和SOM免疫反应性纤维丛与假定的运动神经元关系密切。
