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Comparative study of the innervation of acetylcholinesterase‐positive nerves in the cerebral arterial tree of birds
Author(s) -
KUSABA Haruo,
ANDŌ Koichi,
NOBORU Masayuki,
HAYASHI Kiyonori,
FUJIHARA Noboru,
IWAMOTO Hisao
Publication year - 2002
Publication title -
animal science journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.606
H-Index - 38
eISSN - 1740-0929
pISSN - 1344-3941
DOI - 10.1046/j.1344-3941.2002.00021.x
Subject(s) - quail , acetylcholinesterase , aché , anatomy , cholinergic , cerebral circulation , biology , arterial tree , cerebral cortex , cranial nerves , cerebral arteries , medicine , endocrinology , enzyme , biochemistry
Acetylcholinesterase (AChE) histochemistry and quantitative analysis were used to investigate and compare the projections and densities of cerebral perivascular AChE nerves in five avian species. In the society finch, AChE nerves arising from the cerebral carotid, internal ethmoidal and vertebral arteries generally have no overlap with each other. This is different from AChE neuronal projections via these three vascular routes reported previously for the pigeon, duck, chicken and quail. AChE nerves supplying the pigeon cerebral arterial tree are the highest in density, predominate in the anterior circulation (AC) rather than in the posterior circulation (PC). Similar differential supply of nerves is also found in the duck, with a marked low density in the PC. In contrast, the chicken PC has a substantial amount of AChE nerves that is larger than the fiber amount contained in the AC. The reduction of nerves is far greater in both the AC and PC of the finch. It is not so prominent as that seen in the quail. The significant difference in the distribution and density of cerebral perivascular AChE nerves presented here may indicate that there are some species‐specific cholinergic controlling mechanisms responsible for the cerebral circulation of birds.