Results 171 to 180 of about 9,290 (221)

Observational Learning in the Squirrel Monkey

Perceptual and Motor Skills, 1963
adult males, who were estimated co be 5 yr. old and had served in a variety of learning set experiments, served alternately as demonstrator ( D ) and observer (0) for 150 problems. In design the apparatus closely approximated that described by C. L. Darby and A. J. Riopelle (Observational learning in the rhesus monkey. I. comp . physiol. Psychol.. 1959,
J L, MAHAN, D M, RUMBAUGH
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Ultrastructure of the pulvinar of the squirrel monkey

Journal of Comparative Neurology, 1972
AbstractThree divisions of the squirrel monkey pulvinar, p. inferior (PI), p. lateralis (PL), and p. medialis (PM), have been studied with light‐ and electron‐microscopic techniques. Two populations of neurons exist. The first neuron is a thalamocortical relay cell (TCR), averaging about 26 μ in diameter, with radial dendritic pattern and thin ...
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The Mechanism of Hypercortisolemia in the Squirrel Monkey*

Endocrinology, 1982
The squirrel monkey, a New World primate, has plasma cortisol levels roughly 12 times those in Old World primates, such as the cynomolgus monkey, and man. Two mechanisms are possible to maintain this high plasma cortisol level: an increased cortisol production rate (PR) and a decreased cortisol MCR.
F G, Cassorla, B D, Albertson, G P, Chrousos, J D, Booth, D, Renquist, M B, Lipsett, D L, Loriaux   +6 more
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The Squirrel Monkey Stabil1metry

Acta Oto-Laryngologica, 1982
In order to characterize postural ataxia associated with peripheral vestibular lesions, we have developed a T-perch recording system suitable for squirrel monkeys (tree-living primates). This system includes strain gauges for detecting movement of the vertical shaft in the directions of anterior-posterior and left-right.
Makoto Igarashi, Joel K. Levy, Toshiaki O-Uchi, Walter B. Kulecz   +3 more
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Visual sensitivity in the squirrel monkey

American Journal of Physical Anthropology, 1973
AbstractSeveral indices of visual sensitivity have been obtained from behavioral experiments conducted on the squirrel monkey (Saimiri sciureus). In this species, the photopic spectral sensitivity functions determined by increment‐threshold and flicker discrimination procedures are substantially different; the involvement of two different neural ...
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Of Monkeys and Squirrels

Bibliotheca Orientalis, 2023
WASSERMAN, Nathan, MADRER, Nimrod
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Successive and Concurrent Discrimination by Rock Squirrels and Squirrel Monkeys

Perceptual and Motor Skills, 1966
Groups of rock squirrels and squirrel monkeys were tested on discriminations which were grouped into lists of length 1 (successive presentation), 2, or 4 (concurrent presentation) problems each. All Ss received 16 runs through 360 problems equally divided among the three types of lists.
JAMES E. KING, ROY R. GOODMAN
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Naturally Occurring Tuberculosis in a Squirrel Monkey and a Cebus Monkey

Journal of the American Veterinary Medical Association, 1976
SUMMARY Tuberculosis was detected in a Brazilian squirrel monkey (Saimiri sciureus) and in a cebus monkey (Cebus apella). Both of these animals were housed in the same room with a rhesus monkey (Macaca mulatta) subsequently found to be tuberculous. All 3 of the monkeys died within a 4-month period.
C W, Leathers, T E, Hamm
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Osteosarcoma in a Squirrel Monkey

Journal of the American Veterinary Medical Association, 1977
C, Reed, R H, Garman
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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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