Results 181 to 190 of about 213,573 (272)

Conceptual Numerousness Judgments by Squirrel Monkeys

The American Journal of Psychology, 1980
Two monkeys were reinforced for responding to the card which displayed fewer number of entities (three randomly selected sizes of filled circles) than the other card in any given pair. Area and brightness cues were controlled (at least for the successive numerousness discriminations), as were specific-pattern learning cues.
R K, Thomas, D, Fowlkes, J D, Vickery
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Middle Ear Epithelium of Squirrel Monkey

Acta Oto-Laryngologica, 1971
Detailed anatomical characteristics of normal middle ear epithelium and a topographical distribution of cell types are described for the squirrel monkey. The following cell types were classified by using electron microscopy: 1) ciliated tall cell; 2) ciliated small cell; 3) non-ciliated columnar or cuboidal cell; 4) non-ciliated thin cuboidal or flat ...
Y, Kaneko, F, Hiraide, M M, Paparella
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Sequential Amatching in the Squirrel Monkey

Psychological Reports, 1966
Three squirrel monkeys were trained to perform a sequential matching problem by use of a fading technique. One of three differently colored standard stimuli was presented on the left key when S responded on that key. A response on the right key then resulted in presentation of a comparison stimulus on the right.
D, Meltzer, G C, Maxey, N L, Merkler
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The Claustrum in the Squirrel Monkey

The Anatomical Record, 2019
ABSTRACTThe claustrum (CLA) is a subcortical structure that is reciprocally and topographically connected with the cerebral cortex. The complexity of the cerebral cortex varies dramatically across mammals, raising the question of whether there might also be differences in CLA organization, circuitry, and function. Species variations in the shape of the
Joan S. Baizer, Charles J. Webster, James F. Baker   +2 more
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Saimiri sciureus (Squirrel monkey)

1973
The karyotypes shown are a gift of Dr. T. C. Jones (New England Regional Primate Research Center, Southborough, Massachusetts) and were prepared from lymphocyte cultures. The two recognized phenotypes also differ in karyotype: the male came from Leticia (Colombia), and the female, from Iquitos (Peru).
T. C. Hsu, Kurt Benirschke
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Statoconia Displacement in Squirrel Monkey Ears

ORL, 1985
When findings in squirrel monkey temporal bones after streptomycin sulfate intoxication were compared with those after application of intense linear acceleration, the dislocated utricular statoconia were more frequently found around the cupula of the crista ampullaris posterior in the latter group, whereas statoconia were rather widely disseminated ...
K, Ohashi, M, Igarashi
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Squirrel Monkey Head Holder

Archives of Otolaryngology - Head and Neck Surgery, 1966
The squirrel monkey is ideal for experimental tympanoplasty and stapes surgery. The anatomy of this animal's ear is quite similar to that of a human infant. In addition, its usefulness is attributable to the following reasons: (1) availability; (2) the external auditory canal is relatively straight not tortuous as in most laboratory animals, including
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Orthocephalization in the postweaning squirrel monkey

American Journal of Physical Anthropology, 1996
Twenty male squirrel monkeys (Saimiri sciureus boliviensis) raised in captivity were allotted to one of the following groups: weanling control (C6) sampled at 6 months of age; young control (C24) fed ad libitum on a control diet and killed at 24 months of age; and malnourished (M24) fed ad libitum on a low-protein diet and sampled at 24 months of age ...
H M, Pucciarelli, V, Dressino
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Chondrosarcoma, Squirrel Monkey

1993
An adult male squirrel monkey with severe bilateral exophthalmia and conjunctivitis was euthanatized. Necropsy revealed, in a sagittal section of the head (Fig. 135), a gray-white mass involving the nasal bone and filling the frontal and sphenoid sinuses, the anterior cranial fossa, and much of the nasal cavity.
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Vigilance during play in squirrel monkeys

American Journal of Primatology, 1989
AbstractPlay by young squirrel monkeys (Saimiri boliviensis) may put them and other troop members at risk for predation because youngsters are noisy, separated from adults, and not vigilant when at play. In a study using separated groups of adults and 1‐year‐old juveniles caged outdoors, we found that adult female squirrel monkeys become more vigilant ...
Maxeen, Biben, David, Symmes, Deborah, Bernhards   +2 more
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