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Biomedical subjects

D O Robbins

Publications and source records attributed to D O Robbins.

8 recordsLinked to original sources
PubMed1986

Acute restraint device for rhesus monkeys.

A practical and inexpensive alternative to the standard primate chair is described. The apparatus is designed to allow easy removal of rhesus monkeys from their home cages and to allow restraint without anesthesia. A portable Plexiglas cage, which can be adjusted to accommodate rhesus monkeys of varying sizes, is placed against an animal's home cage. The animal is then trained to avoid the squeeze mechanism of the home cage by going into the Plexiglas cage. The animal's head can then be secured by means of poles hooked to a light weight collar worn permanently. This device and procedure allows an investigator to work with a restrained animal without resorting to drugs, unnecessary force or chronic restraint. Animals can be transferred daily with this technique with minimal conditioning and cooperation.

Animals↗
PubMed1978

Is the rhesus protanomalous?

Comparison of rhesus, human trichromat, and human protanomalous subjects were made for measurements of spectral sensitivity involving Landolt ring acuity criteria from 0.11 to 1.11 min-1. At 0.11 min-1, rhesus spectral sensitivity was more similar to that of the normal human trichromats than that of the human protanomalous observers. However, as acuity criterion became finer (thereby involving more central retinal function), rhesus spectral sensitivity became markedly more similar to that of the human protanomalous observers than that of the normal human trichromats.

Adult↗
PubMed1973

Relationships between luminance and visual acuity in the rhesus monkey.

1. The ability of rhesus monkeys to detect the gap in Landolt ring test-objects that were presented against background luminances between 5 x 10(-5) cd/m(2) and 5 x 10(3) cd/m(2) was compared with similar human data.2. At high luminance-levels the acuity of human observers is slightly better than that of rhesus, but rhesus have better acuity at scotopic luminance-levels. Both species have distinct photopic and scotopic acuity functions that cross at 6 x 10(-3) cd/m(2).3. The threshold for light detection is estimated to be the same for both species when specified in quanta incident on the retina.4. It is concluded that the receptor and neural mechanisms that mediate visual-acuity function similarly in rhesus and man, and that the differences in acuity that were measured in the two species may be attributed to optical rather than to physiological factors.

Animals↗