Arterial Supply and Venous Drainage of the Brain of the Black Bear (Ursus americanus)

1989 ◽  
Vol 135 (3) ◽  
pp. 285-288 ◽  
Author(s):  
Bettina G. Anderson ◽  
Wesley D. Anderson ◽  
Randolph J. Seguin
Keyword(s):  
Ursus Americanus ◽  
Black Bear ◽  
Venous Drainage ◽  
Arterial Supply ◽  
The Brain

Arterial Supply and Venous Drainage of the Brain of the Black Bear (Ursus americanus)

1989 ◽  
Vol 135 (3) ◽  
pp. 281-284 ◽  
Author(s):  
Wesley D. Anderson ◽  
Bettina G. Anderson ◽  
Randolph .J. Seguin
Keyword(s):  
Ursus Americanus ◽  
Black Bear ◽  
Venous Drainage ◽  
Arterial Supply ◽  
The Brain

scholarly journals Predictive morphological factors of rupture of arteriovenous malformations of the brain

2013 ◽  
Vol 60 (4) ◽  
pp. 77-81
Author(s):  
Sinisa Matic ◽  
Nikola Repac ◽  
Igor Nikolic ◽  
Igor Djoric ◽  
Aleksandar Janicijevic ◽  
...  
Keyword(s):  
Average Length ◽  
Venous Drainage ◽  
Symptomatic Treatment ◽  
Arterial Supply ◽  
Bleeding Events ◽  
Clinical Center ◽  
Vertebrobasilar Artery ◽  
The Brain ◽  
Annual Risk

The study includes a series of 39 patients with AVM of the brain that are not subjected to any method of treatment, except for the symptomatic treatment who were hospitalized and diagnosed AVM at the Institute of Neurosurgery, Clinical Center, in the period 2005-2011. Results: The structure of the patients was measured by gender are male. Average age of the respondents was 27.4 ? 7.6 years. With the average length of the follow-up of 4.8 years, new hemorrhage occurred in 24 patients (58 episodes). Predictor (p<0.01), factors for bleeding include: arterial supply from the VB and ACA basin and multiple arterial supply. Conclusion: The analysis of our series may be proposed for following model of the natural course of AVM : After initiall haemorrhage there is annual risk of rehemorrhage of 3.33%. Bleeding events were significantly more common in medium-sized AVM (2.5 - 5 cm), localized in elocvent area of the brain with combined type of venous drainage, arterial supply from the vertebrobasilar artery, anterior cerebral artery basin or combined arterial supply.

Senile Plaques and Other Senile Changes in the Brain of an Aged American Black Bear

1995 ◽  
Vol 32 (4) ◽  
pp. 412-414 ◽  
Author(s):  
K. Uchida ◽  
T. Yoshino ◽  
R. Yamaguchi ◽  
S. Tateyama ◽  
Y. Kimoto ◽  
...  
Keyword(s):  
Ursus Americanus ◽  
Senile Plaques ◽  
Black Bear ◽  
Histopathologic Examination ◽  
Corpora Amylacea ◽  
American Black Bear ◽  
Mineral Deposition ◽  
Senile Changes ◽  
American Black ◽  
The Brain

A female American black bear ( Euarctos ursus americanus) over 20 years old had shown epileptiform neurologic signs starting in March 1992 and was found dead unexpectedly 8 months later. At necropsy, pulmonary and intrabronchial hemorrhage was noted. In the brain, the leptomeninges exhibited slight thickening, and petechiae were evident in the hippocampus. Histopathologic examination of the brain revealed several senile changes: numerous senile plaques, amyloid deposition in cerebromeningeal arterioles, mineral deposition in the pallidum, and numerous corpora amylacea in the cerebellum.

Molecular characterization of Sarcocystis spp. as a cause of protozoal encephalitis in a free-ranging black bear

2021 ◽  
pp. 104063872110383
Author(s):  
Jordan B. Greenfield ◽  
Madison V. Anderson ◽  
Emily A. Dorey ◽  
Elizabeth Redman ◽  
John S. Gilleard ◽  
...  
Keyword(s):  
Plasma Cells ◽  
Ursus Americanus ◽  
Black Bear ◽  
Juvenile Male ◽  
Molecular Analyses ◽  
Rdna Its ◽  
Sarcocystis Spp ◽  
Free Ranging ◽  
The Brain

A free-ranging juvenile male black bear ( Ursus americanus), found dead in Alberta, Canada, had severe nonsuppurative encephalitis. Lesions in the brain were most severe in the gray matter of the cerebral cortex, and included perivascular cuffs of lymphocytes and plasma cells, areas of gliosis that disrupted the neuropil, and intralesional protozoan schizonts. The left hindlimb had suppurative myositis associated with Streptococcus halichoeri. Immunohistochemistry and molecular analyses (PCR and sequencing of 4 discriminatory loci: 18S rDNA, ITS-1 rDNA, cox1, rpoB) identified Sarcocystis canis or a very closely related Sarcocystis sp. in the affected muscle and brain tissues. The main lesion described in previously reported cases of fatal sarcocystosis in bears was necrotizing hepatitis. Fatal encephalitis associated with this parasite represents a novel presentation of sarcocystosis in bears. Sarcocystosis should be considered a differential diagnosis for nonsuppurative encephalitis in bears.

Reducing Human-Bear Conflicts: Bear-Resistant Trash Cans

EDIS ◽  
2017 ◽  
Vol 2017 (3) ◽  
Author(s):  
Ethan T. Noel ◽  
Elizabeth F. Pienaar ◽  
Mike Orlando
Keyword(s):  
Great Risk ◽  
Ursus Americanus ◽  
Black Bear ◽  
Food Sources ◽  
Vehicle Collisions ◽  
Wildlife Ecology ◽  
Human Food ◽  
Fact Sheet

The Florida black bear (Ursus americanus floridanus) is the only species of bear in Florida, with an estimated population of approximately 4,030 bears. Bears that eat garbage put themselves in danger. This 3-page fact sheet written by Ethan T. Noel, Elizabeth F. Pienaar, and and Mike Orlando and published by the Wildlife Ecology and Conservation Department explains how to secure human garbage from bears so that they don’t become reliant on human food sources, a condition that puts them at great risk of being killed from vehicle collisions, illegal shooting, or euthanasia.­http://edis.ifas.ufl.edu/uw429

Sarcoptic Mange and Pelodera Dermatitis in an American Black bear (Ursus americanus)

2008 ◽  
Vol 39 (2) ◽  
pp. 257-259 ◽  
Author(s):  
Scott D. Fitzgerald ◽  
Thomas M. Cooley ◽  
Melinda K. Cosgrove
Keyword(s):  
Ursus Americanus ◽  
Black Bear ◽  
Sarcoptic Mange ◽  
American Black Bear ◽  
American Black
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