Cai W Q, Gabella G
J Anat. 1984 Aug;139 ( Pt 1)(Pt 1):93-104.
The musculature of the pylorus of the guinea-pig consists of a conspicuous ring of circular musculature. On one side, this tissue is apposed to the circular muscle layer of the duodenum, a complete septum of connective tissue intervening between the two muscles. On the other side, it is in continuity with the circular musculature of the gastric antrum. Bundles of longitudinal muscle, running close to the submucosa of the antrum, form a loop and contribute to the circular musculature of the pylorus. The subserosal longitudinal muscle of the antrum continues into the pylorus and the duodenum. The density of innervation, i.e. number of bundles, number of axons and percentage of varicosities per unit sectional area or per number of muscle cell profiles (estimated on large photographic montages of transversely sectioned muscles) is higher in the pylorus than in the duodenum, and is lowest in the antrum. In the duodenum nerve bundles occur in both the circular and the longitudinal muscle layer; the majority of axons and varicosities are situated between the bulk of the circular muscle and a layer of special muscle cells adjacent to the submucosa.
豚鼠幽门的肌肉组织由一圈明显的环形肌肉组成。在一侧，该组织与十二指肠的环形肌层相邻，两层肌肉之间有一层完整的结缔组织隔膜。在另一侧，它与胃窦的环形肌肉相连。靠近胃窦黏膜下层的纵行肌束形成一个环，并参与幽门环形肌肉的构成。胃窦的浆膜下纵行肌延续至幽门和十二指肠。神经支配密度，即单位横截面积或每单位数量肌细胞断面（根据横切肌肉的大幅拼接照片估算）的束数、轴突数和曲张体百分比，在幽门高于十二指肠，在胃窦最低。在十二指肠，神经束存在于环形肌层和纵行肌层；大多数轴突和曲张体位于环形肌主体与黏膜下层相邻的一层特殊肌细胞之间。
