Mechanisms of Neuronal Migration during Corticogenesis

Mechanisms of Neuronal Migration during Corticogenesis

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The cerebral cortex plays central roles in many higher-order functions such as cognition, language, consciousness, and the control of voluntary behavior. These processes are performed by the densely interconnected networks of excitatory pyramidal neurons and inhibitory interneurons, and the balanced development of these two types of neuron is quite important. During cortical development, pyramidal neurons and interneurons show quite different migratory behaviors: radial migration and tangential migration, respectively. Pyramidal neurons are generated in the ventricular zone of the dorsal telencephalon, and migrate radially along radial glial fibers toward the pial surface, forming a six-layered cortical structure in an a€œ inside-outa€ manner. On the other hand, cortical interneurons are generated in the medial and caudal ganglionic eminence in the ventral telencephalon, and follow long tangential migratory paths into the cortex. Defects in these migration processes result in abnormalities in the cortical layer structure and neuronal networks, which may cause various neurological and psychiatric conditions such as epilepsy and schizophrenia. Accordingly, besides basic scientific interest, elucidation of the mechanism of neuronal migration is essential for understanding the pathogenesis of these diseases. This Research Topic includes a series of articles ranging from the basic mechanism of neocortical development to the malformation and evolution of the neocortex. We do hope that the present ebook will further stimulate the interest in the fascinating investigations of neuronal migration and corticogenesis.16, 133a€“146. doi: 10.1038/nrn3915 Hoshiko, M., Arnoux, I., Avignone, E., Yamamoto, N., and Audinat, E. (2012). ... (2013). Microglia emerge from erythromyeloid precursors via Pu.1- and Irf8-dependent pathways. Nat. Neurosci. 16, 273a€“280. doi:10.1038/nn.3318 Kuhn, T. B., Schmidt, M. F., and Kater, S. B. ( 1995). Laminin and fibronectin guideposts signal sustained but opposite effects to passing ... Sensory map transfer to the neocortex relies on pretarget ordering of thalamic axons.

Title:Mechanisms of Neuronal Migration during Corticogenesis
Author: Chiaki Ohtaka-Maruyama, Kazunori Nakajima, Alessandra Pierani, Nobuaki Maeda
Publisher:Frontiers Media SA - 2016-07-15

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