Normal imaging of cerebrospinal fluid (CSF) flow in the primate Macaca mulatta 99m using Tc labeled human serum albumin shows flow from the basal cisterns over the cerebral cortex in 4 hours. Anatomical correlation of basal cisterns with cisternographic images was demonstrated with latex casts of the normal CSF spaces. Cisternographic images from nonhuman primates with experimental communicatin...

The view that female infra-human primates do not achieve orgasm is widespread [e.g. FORD and BEACH, 1952; MORRIS, 1967]. It has been assumed that this aspect of sexual behaviour is qualitatively different in man. While there has been much experimentation in the neurophysiology and endocrinology of sexual behaviour in infra-human primates over the past 30-40 years, the assumption that female mon...

Six fertile and healthy adult Macaca fascicularis males were studied. Radioimmunological assay of the plasma testosterone, sampled without anesthesia in the afternoon at the beginning of each month, showed an annual hormone cycle with a maximum (16.7 +/- 1.1 ng/ml) in the fall and a minimum (9.5 +/- 0.9 ng/ml) in the spring (fig. 1). Using the ratio: number of ejaculations/number of trials, the...

Rhesus macaques (Macaca mulatta) have been used as non-human primate (NHP) models for a number of stress-related situations [1, 8, 9, 11, 16, 17, 21]. A key aspect of United States (US) animal welfare regulations [18, 19] is that pain, distress, and discomfort should be minimized whenever possible. The refinement of our experimental procedures is an important technique to improve animal welfare...