The radial orientation effect in human and non-human primates

The Radial Bias: A Different Slant on Visual Orientation Sensitivity in Human and Nonhuman Primates

It is generally assumed that sensitivity to different stimulus orientations is mapped in a globally equivalent fashion across primate visual cortex, at a spatial scale larger than that of orientation columns. However, some evidence predicts instead that radial orientations should produce higher activity than other orientations, throughout visual cortex. Here, this radial orientation bias was ro...

Non-human Primates

Introduction Less than 1⁄4 of one percent of all lab animals needed in the U.S. are non-human primates. Approximately 30 different species are studied by the research community.1 Many historic scientific breakthroughs, such as the discovery of the Rh factor and the development of a live polio virus vaccine were achieved through research with non-human primates. Today they are considered extreme...

Sparganosis in non-human primates.

CHAI , D. FARAH, I. & MUCHEMI , G. 1997. Sparganosis in non-human primates. Onderstepoort Journal of Veterinary Research, 64:243-244 Over a period of 15 years, the larval stages of Diphyllobothri id tapeworms of the genus Spirometra were found during routine necropsy in four of 3 007 non-human primates at the Institute of Primate Research (IPR) .

Non-human Primates and Communication

Temporal and Spatial Categorization in Human and Non-Human Primates

It has been proposed that a functional overlap exists in the brain for temporal and spatial information processing. To test this, we designed two relative categorization tasks in which human subjects and a Rhesus monkey had to assign time intervals or distances to a "short" or "long" category according to varying prototypes. The performance of both species was analyzed using psychometric techni...