Investigating perceptual and cognitive abilities of zoo animals might help to improve their husbandry and enrich their daily life with new stimuli. Developing new environmental enrichment programs and devices is hence necessary to promote species-specific behaviors that need to be maintained in controlled environments. As far as we are aware, no study has ever tested the potential benefits of motion illusions as visual enrichment for zoo animals.
View Article and Find Full Text PDFThe cases of primary intrarachidian tumours observed in the 1977-1986 period in the neurological, neurosurgical, oncological and radiological Departments in Sardinia, were collected. Only histologically diagnosed tumours of spinal cord, root-nerve and their envelops in patients resident in the island for at least one year were included in the investigation. The annual crude incidence rate was 0.
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