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Fetal Gyrification in Cynomolgus Monkeys: A Concept of Developmental Stages of Gyrification

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Abstract

Our article summarizes a series of studies about fetal gyrification and its relation to cerebral growth in cynomolgus monkeys. Based on the cerebral growth (i.e., brain weight, cerebral volume, and frontooccipital length of the cerebral hemisphere) and the developmental pattern of gyrification in each sulcus of cynomolgus monkeys, we divided the gyrification process into four stages: Stage 1. Demarcation of cerebral lobes and limbic gyri; Stage 2. Demarcation of neocortical gyri; Stage 3. Emergence of secondary and tertiary sulci; and Stage 4. Growth of sulcal length and depth. Each stage of those gyrification processes was influenced by different developmental events, such as the emergence of corticocortical long‐associative fiber tracts, cortical maturations, and subcortical white‐matter development. This is the first report to systematically propose gyrification processes closely related to the order of phyologenetical development of the cerebral cortex in primates. Anat Rec, 2012. © 2012 Wiley Periodicals, Inc.
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Document Type: Research Article

Affiliations: 1: Laboratory of Anatomy, Department of Physical Therapy, Faculty of Medical and Health Sciences, Tsukuba International University, Tsuchiura, Ibaraki, Japan 2: Shin Nippon Biomedical Laboratories, Kagoshima, Japan 3: Department of Anatomy and Developmental Neurobiology, University of Tokushima Graduate School Institute of Health Biosciences, Tokushima, Japan 4: Molecular Imaging Center, National Institute of Radiological Sciences, Chiba, Japan

Publication date: July 1, 2012

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