ISSN:
0003-276X
Keywords:
Life and Medical Sciences
;
Cell & Developmental Biology
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Medicine
Notes:
Little has been reported concerning circulus arteriosus cerebri in adult rats. A study of rats' brains perfused with latex and fixed in formalin revealed the general configuration of a circular type pattern of the major cerebral arteries in which all vessels were patent. No major vessel was “string-like” and no circles were incomplete.Certain morphological features not described previously were observed. Included among the more significant of these were: (1) the asymmetrical origin of the posterior cerebral artery found to occur in more than half of the animals; (2) the presence of cleft-like buttonhole formations along the anterior cerebral artery of one or both sides, a feature that was practically species characteristic; (3) the occasional presence of an anterior communicating artery supplemental to the commonly occurring side to side fusion of the two anterior cerebral arteries. Two animals, possessing two anterior communicating arteries connecting otherwise unfused anterior cerebral arteries, were exceptional; (4) an olfactory artery to the nasal cavity branched promineantly from the anterior cerebral artery in all animals.Before exiting from the cranial cavity through the dorsomedial cribriform foramen, the olfactory artery gave origin to a laterally directedramus, the central cribriform artery, that passed through the central cribriform foramen into the nasal cavity.
Additional Material:
12 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/ar.1091560112
