Projection of the vestibular nerve to the area 3a arm field in the squirrel monkey (Saimiri Sciureus)

1974 ◽  
Vol 21 (1) ◽  
Author(s):  
L.M. �dkvist ◽  
D.W.F. Schwarz ◽  
J.M. Fredrickson ◽  
R. Hassler
Keyword(s):  
Squirrel Monkey ◽  
Vestibular Nerve ◽  
Saimiri Sciureus ◽  
Area 3A

Deafferentated vestibular nerve

1983 ◽  
Vol 41 ◽  
pp. 652-653
Author(s):  
C.D. Fermin ◽  
M. Igarashi
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Light Microscopy ◽  
Squirrel Monkey ◽  
Toluidine Blue ◽  
Vestibular Nerve ◽  
Saimiri Sciureus ◽  
Basic Fuchsin ◽  
Transmission Electron ◽  
Viiith Nerve

Contrary to the cochlear branch of the VIIIth nerve, the vestibular branch does not degenerate quickly in the squirrel monkey after the end organs are surgically removed. This surgical procedure is favored by some investigators who advocate that removal of the vestibular receptors does eventually lead to the death of the nerve. Others think that the neurons of the vestibular ganglion can regenerate and contribute to partial reoccurrence of the symptoms the patient had before surgery. Thus, this problem remains unsettled. We are presently studying the vestibular nerve and ganglia of the squirrel monkey (Saimiri sciureus) in order to examine the fate of the surviving neurons, and the changes that these cells undergo after labyrinthectomy. Animals were anesthetized, perfused intracardially and the specimens were processed for transmission electron microscopy (TEM) as previously described. For light microscopy (LM), some specimens were embedded in JB-4 plastic, cut serially at 5 micra and stained with 0.2% toluidine blue and 0.1% basic fuchsin in 25% alcohol.

The Vestibular Nerve and Ganglia of the Squirrel Monkey after Labyrinthectomy

1982 ◽  
Vol 40 ◽  
pp. 196-197
Author(s):  
C. D. Fermin ◽  
M. Igarashi
Keyword(s):  
Squirrel Monkey ◽  
Peripheral Nerves ◽  
Wallerian Degeneration ◽  
Vestibular Nuclei ◽  
Vestibular Nerve ◽  
Saimiri Sciureus

Since Nissl's observations in 1894, it is known that after injury, peripheral nerves undergo morphological and physiological modifications of their axons, dendrites and soma (perikarya) that cause the nerve to degenerate (Wallerian degeneration). The ultrastucture of vestibular ganglia (Scarpa) have been studied in various species including man, and its neuroanatomical relationship to the vestibular nuclei has also been studied. Histological work has shown that the squirrel monkey vestibular ganglia (SMVG) can survive after labyrinthectomy. The squirrel monkey (saimiri sciureus) is a small primate that is intensively used in otological research, however, only a few studies have examined the SMVG ultrastructurally. Here we present the results from our first study intended to ellucidate the pathology of the surviving SMVG following injury to the peripheral end organs and nerves.

Morphology and mitochondrial phylogenetics reveal that the Amazon River separates two eastern squirrel monkey species: Saimiri sciureus and S. collinsi

2015 ◽  
Vol 82 ◽  
pp. 426-435 ◽  
Author(s):  
Michelle P. Mercês ◽  
Jessica W. Lynch Alfaro ◽  
Wallax A.S. Ferreira ◽  
Maria L. Harada ◽  
José S. Silva Júnior
Keyword(s):  
Squirrel Monkey ◽  
Saimiri Sciureus ◽  
Amazon River ◽  
Monkey Species

Production of Zinc Deficiency in the Squirrel Monkey (Saimiri sciureus)

1967 ◽  
Vol 93 (4) ◽  
pp. 499-510 ◽  
Author(s):  
M. P. Macapinlac ◽  
G. H. Barney ◽  
W. N. Pearson ◽  
W. J. Darby
Keyword(s):  
Squirrel Monkey ◽  
Zinc Deficiency ◽  
Saimiri Sciureus

Terminal 13p deletion in squirrel monkey (Saimiri sciureus ) with differentiated phenotype

2018 ◽  
Vol 47 (6) ◽  
pp. 412-415
Author(s):  
B. Goldschmidt ◽  
C.A.A. Lopes ◽  
F. Resende ◽  
T.A. Pissinatti ◽  
D.C. Toledo ◽  
...  
Keyword(s):  
Squirrel Monkey ◽  
Saimiri Sciureus

scholarly journals Sexual dimorphism in the squirrel monkey, Saimiri sciureus (Linnaeus, 1758) and Saimiri ustus (I. Geoffroy, 1844) (Primates, Cebidae)

2009 ◽  
Vol 69 (1) ◽  
pp. 171-174 ◽  
Author(s):  
B. Goldschmidt ◽  
A. Mota-Marinho ◽  
C. Araújo-Lopes ◽  
MA. Brück-Gonçalves ◽  
D. Matos-Fasano ◽  
...  
Keyword(s):  
Body Weight ◽  
Sexual Dimorphism ◽  
Squirrel Monkey ◽  
Coat Color ◽  
Morphological Characters ◽  
Saimiri Sciureus ◽  
External Ear ◽  
Adult Females ◽  
In The Wild ◽  
Capture Techniques

Causes and implications of sexual dimorphism have been studied in several different primates using a variety of morphological characters such as body weight, canine length, coat color and ornamentation. Here we describe a peculiar coat color characteristic in the squirrel monkey that is present only in adult females over five years old and which increases with age. Neither males nor young animals manifest this phenomenon, which is characterized by a spot of black hairs located anteriorly to the external ear (pinna). This characteristic could be used to discriminate adult females of Saimiri sciureus in the wild without the need of capture techniques.

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