Enucleation demonstrates ocular dominance columns in Old World macaque but not in New World squirrel monkey visual cortex |
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| Authors: | Anita E. Hendrickson Margarete Tigges |
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| Affiliation: | 1. Departments of Biological Structure and Ophthalmology, University of Washington School of Medicine, Seattle, WA (USA);2. Yerkes Regional Primate Research Center and the Departments of Anatomy and Ophthalmology, Emory University, Atlanta, GA (U.S.A.);1. Montana State University, Bozeman, MT, United States;2. Stanford University, Stanford, CA, United States;3. Lumos Labs, San Francisco, CA, United States;4. School of Cognitive Sciences (SCS), Institute for Research in Fundamental Sciences (IPM), Tehran, Iran;1. The Ophthalmology and Brain Cognition Collaboration Research Center of Zhongshan Ophthalmic Center and SIAT, State Key Laboratory of Ophthalmology, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China;2. The Ophthalmology and Brain Cognition Collaboration Research Center of Zhongshan Ophthalmic Center and SIAT, The Brain Cognition & Brain Disease Institute for Collaboration Research of SIAT at CAS and the McGovern Institute at MIT, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, 1068 XueYuan Avenue, University Town of Shenzhen, Xili Nanshan, Shenzhen, Guangdong, China;3. Department of Ophthalmology, Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510630, China;1. Federal University of Paraiba, Joao Pessoa, Brazil;2. Rutgers University Behavioral Health Care, Piscataway, NJ, USA |
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| Abstract: | The effect of monocular enucleation on basophilic and metabolic staining in primary (striate) visual cortex has been compared in Old and New World monkeys. Both species show a 30-40% shrinkage of neurons in the layers of dorsal lateral geniculate nucleus receiving axons from the enucleated eye. In striate cortex Old World macaque monkeys show alternating bands of increased and diminished staining in layers 3, 4 and 6, corresponding to ocular dominance columns. New World squirrel monkeys show staining patterns in all layers which are unchanged from normal cortex, suggesting that New World monkeys lack obvious ocular dominance columns. |
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| Keywords: | primates enucleation striate cortex lateral geniculate nucleus cytochrome oxidase |
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