Estudio histologico del desarrollo del cerebelo

Se estudia histológicamente el desarrollo del cerebelo en la rata y se compara cronológicamente con el humano. El cerebelo deriva del rombencéfalo y su esbozo se establece en [E.sub.r]15d/[E.sub.h]8s (Embrión días/semanas). La fuente de neuronas en el cerebelo es: 1) región subventricular, desde don...

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Veröffentlicht in:Revista Complutense de Ciencias Veterinarias 2017-07, Vol.11 (SE), p.181
Hauptverfasser: García Jarabo, E, Rodríguez Serrano, A
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description Se estudia histológicamente el desarrollo del cerebelo en la rata y se compara cronológicamente con el humano. El cerebelo deriva del rombencéfalo y su esbozo se establece en [E.sub.r]15d/[E.sub.h]8s (Embrión días/semanas). La fuente de neuronas en el cerebelo es: 1) región subventricular, desde donde migran radialmente los precursores de las neuronas de Purkinje hacia la parte más dorsal del esbozo cerebeloso, formando múltiples capas ([E.sub.r]18d/[E.sub.h]13s), para más adelante organizarse en una sola hilera ([P.sub.r]6d/[E.sub.h]30s; Postnatal); 2) parte rostral del labio rómbico, a partir del cual y por migración tangencial hacia la zona dorsal, se genera la capa granular externa (EGL) ([E.sub.r]17d/[E.sub.h]10s). Desde la EGL, los granos migran hacia la profundidad sobrepasando los somas de Purkinje, para constituir la capa granular interna (IGL) ([P.sub.r]0-1d/[E.sub.h]20s). Posteriormente la EGL desaparece ([P.sub.r]20d/[P.sub.h]7meses), estableciéndose una única capa granular. La laminación primaria se inicia en [E.sub.r]20-21d/[E.sub.h]12s y la secundaria en [P.sub.r]0-1d/[E.sub.h]15s. Palabras clave: cerebelo, desarrollo, embrión, postnatal. We study the histological cerebellar development in rats and we compared it chronologically to humans. The cerebellum derives from the hindbrain, and its origin occurs in Er15d/Eh8w (embryo days/weeks). Sources of neurons in the cerebellum are: 1) subventricular region where precursors of Purkinje neurons migrate radially towards to the dorsal surface of the cerebellar anlage, where they organize in several layers ([E.sub.r]18d/[E.sub.h]13w). Later, Purkinje neurons arranged in a unique layer ([P.sub.r]6d/[E.sub.h]30w; Postnatal); 2) rostral part of the rhombic lip, from which granule cells precursors migrate tangentially to constitute the external granular layer (EGL) located next to the dorsal area of the cerebellar anlage ([E.sub.r]17d/[E.sub.h]10w). EGL granule cells migrate to a deeper possition, overcoming the Purkinje layer to form the internal granule layer (IGL) ([P.sub.r]0-1d/[E.sub.h]20w). Subsequently EGL disappears ([P.sub.r]20d/[P.sub.h]7months), establishing a single granular layer. The primary lamination starts in [E.sub.r]20-21d/[E.sub.h]12w and secondary lamination in [P.sub.r]0-1d/[E.sub.h]15w. Key words: cerebellum, development, embryo, postnatal.
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El cerebelo deriva del rombencéfalo y su esbozo se establece en [E.sub.r]15d/[E.sub.h]8s (Embrión días/semanas). La fuente de neuronas en el cerebelo es: 1) región subventricular, desde donde migran radialmente los precursores de las neuronas de Purkinje hacia la parte más dorsal del esbozo cerebeloso, formando múltiples capas ([E.sub.r]18d/[E.sub.h]13s), para más adelante organizarse en una sola hilera ([P.sub.r]6d/[E.sub.h]30s; Postnatal); 2) parte rostral del labio rómbico, a partir del cual y por migración tangencial hacia la zona dorsal, se genera la capa granular externa (EGL) ([E.sub.r]17d/[E.sub.h]10s). Desde la EGL, los granos migran hacia la profundidad sobrepasando los somas de Purkinje, para constituir la capa granular interna (IGL) ([P.sub.r]0-1d/[E.sub.h]20s). Posteriormente la EGL desaparece ([P.sub.r]20d/[P.sub.h]7meses), estableciéndose una única capa granular. La laminación primaria se inicia en [E.sub.r]20-21d/[E.sub.h]12s y la secundaria en [P.sub.r]0-1d/[E.sub.h]15s. Palabras clave: cerebelo, desarrollo, embrión, postnatal. We study the histological cerebellar development in rats and we compared it chronologically to humans. The cerebellum derives from the hindbrain, and its origin occurs in Er15d/Eh8w (embryo days/weeks). Sources of neurons in the cerebellum are: 1) subventricular region where precursors of Purkinje neurons migrate radially towards to the dorsal surface of the cerebellar anlage, where they organize in several layers ([E.sub.r]18d/[E.sub.h]13w). Later, Purkinje neurons arranged in a unique layer ([P.sub.r]6d/[E.sub.h]30w; Postnatal); 2) rostral part of the rhombic lip, from which granule cells precursors migrate tangentially to constitute the external granular layer (EGL) located next to the dorsal area of the cerebellar anlage ([E.sub.r]17d/[E.sub.h]10w). EGL granule cells migrate to a deeper possition, overcoming the Purkinje layer to form the internal granule layer (IGL) ([P.sub.r]0-1d/[E.sub.h]20w). Subsequently EGL disappears ([P.sub.r]20d/[P.sub.h]7months), establishing a single granular layer. The primary lamination starts in [E.sub.r]20-21d/[E.sub.h]12w and secondary lamination in [P.sub.r]0-1d/[E.sub.h]15w. 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El cerebelo deriva del rombencéfalo y su esbozo se establece en [E.sub.r]15d/[E.sub.h]8s (Embrión días/semanas). La fuente de neuronas en el cerebelo es: 1) región subventricular, desde donde migran radialmente los precursores de las neuronas de Purkinje hacia la parte más dorsal del esbozo cerebeloso, formando múltiples capas ([E.sub.r]18d/[E.sub.h]13s), para más adelante organizarse en una sola hilera ([P.sub.r]6d/[E.sub.h]30s; Postnatal); 2) parte rostral del labio rómbico, a partir del cual y por migración tangencial hacia la zona dorsal, se genera la capa granular externa (EGL) ([E.sub.r]17d/[E.sub.h]10s). Desde la EGL, los granos migran hacia la profundidad sobrepasando los somas de Purkinje, para constituir la capa granular interna (IGL) ([P.sub.r]0-1d/[E.sub.h]20s). Posteriormente la EGL desaparece ([P.sub.r]20d/[P.sub.h]7meses), estableciéndose una única capa granular. La laminación primaria se inicia en [E.sub.r]20-21d/[E.sub.h]12s y la secundaria en [P.sub.r]0-1d/[E.sub.h]15s. Palabras clave: cerebelo, desarrollo, embrión, postnatal. We study the histological cerebellar development in rats and we compared it chronologically to humans. The cerebellum derives from the hindbrain, and its origin occurs in Er15d/Eh8w (embryo days/weeks). Sources of neurons in the cerebellum are: 1) subventricular region where precursors of Purkinje neurons migrate radially towards to the dorsal surface of the cerebellar anlage, where they organize in several layers ([E.sub.r]18d/[E.sub.h]13w). Later, Purkinje neurons arranged in a unique layer ([P.sub.r]6d/[E.sub.h]30w; Postnatal); 2) rostral part of the rhombic lip, from which granule cells precursors migrate tangentially to constitute the external granular layer (EGL) located next to the dorsal area of the cerebellar anlage ([E.sub.r]17d/[E.sub.h]10w). EGL granule cells migrate to a deeper possition, overcoming the Purkinje layer to form the internal granule layer (IGL) ([P.sub.r]0-1d/[E.sub.h]20w). Subsequently EGL disappears ([P.sub.r]20d/[P.sub.h]7months), establishing a single granular layer. The primary lamination starts in [E.sub.r]20-21d/[E.sub.h]12w and secondary lamination in [P.sub.r]0-1d/[E.sub.h]15w. 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El cerebelo deriva del rombencéfalo y su esbozo se establece en [E.sub.r]15d/[E.sub.h]8s (Embrión días/semanas). La fuente de neuronas en el cerebelo es: 1) región subventricular, desde donde migran radialmente los precursores de las neuronas de Purkinje hacia la parte más dorsal del esbozo cerebeloso, formando múltiples capas ([E.sub.r]18d/[E.sub.h]13s), para más adelante organizarse en una sola hilera ([P.sub.r]6d/[E.sub.h]30s; Postnatal); 2) parte rostral del labio rómbico, a partir del cual y por migración tangencial hacia la zona dorsal, se genera la capa granular externa (EGL) ([E.sub.r]17d/[E.sub.h]10s). Desde la EGL, los granos migran hacia la profundidad sobrepasando los somas de Purkinje, para constituir la capa granular interna (IGL) ([P.sub.r]0-1d/[E.sub.h]20s). Posteriormente la EGL desaparece ([P.sub.r]20d/[P.sub.h]7meses), estableciéndose una única capa granular. La laminación primaria se inicia en [E.sub.r]20-21d/[E.sub.h]12s y la secundaria en [P.sub.r]0-1d/[E.sub.h]15s. Palabras clave: cerebelo, desarrollo, embrión, postnatal. We study the histological cerebellar development in rats and we compared it chronologically to humans. The cerebellum derives from the hindbrain, and its origin occurs in Er15d/Eh8w (embryo days/weeks). Sources of neurons in the cerebellum are: 1) subventricular region where precursors of Purkinje neurons migrate radially towards to the dorsal surface of the cerebellar anlage, where they organize in several layers ([E.sub.r]18d/[E.sub.h]13w). Later, Purkinje neurons arranged in a unique layer ([P.sub.r]6d/[E.sub.h]30w; Postnatal); 2) rostral part of the rhombic lip, from which granule cells precursors migrate tangentially to constitute the external granular layer (EGL) located next to the dorsal area of the cerebellar anlage ([E.sub.r]17d/[E.sub.h]10w). EGL granule cells migrate to a deeper possition, overcoming the Purkinje layer to form the internal granule layer (IGL) ([P.sub.r]0-1d/[E.sub.h]20w). Subsequently EGL disappears ([P.sub.r]20d/[P.sub.h]7months), establishing a single granular layer. The primary lamination starts in [E.sub.r]20-21d/[E.sub.h]12w and secondary lamination in [P.sub.r]0-1d/[E.sub.h]15w. Key words: cerebellum, development, embryo, postnatal.</abstract><cop>Madrid</cop><pub>Universidad Complutense de Madrid</pub><doi>10.5209/RCCV.55496</doi></addata></record>
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1988-2688
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subjects Cell migration
Cerebellum
Granule cells
Hindbrain
Lamination
Neurons
Purkinje cells
Rats
Rodents
title Estudio histologico del desarrollo del cerebelo
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