Original scientific paper

Development of accessory lobes in the spinal cord of the turkey (Meleagris gallopavo).

Snjezana Vuković ; Department of Anatomy, Histology and Embryology, Faculty of Veterinary Medicine, University of Zagreb, Zagreb, Croatia
Hrvoje Lucić ; Department of Anatomy, Histology and Embryology, Faculty of Veterinary Medicine, University of Zagreb, Zagreb, Croatia
Snjezana Ćurković ; Department of Anatomy, Histology and Embryology, Faculty of Veterinary Medicine, University of Zagreb, Zagreb, Croatia

Abstract

Accessory lobes are unusual structures of the lumbosacral segment of the avian spinal cord, which are characterized by glycogen accumulation. They consist of neuroglial cells and neurons, which are similar to the multipolar neurons of the ventral horns of the grey matter. Development of the accessory lobes is different from that of other glycogen-rich regions of the avian spinal cord. At the 8th day of embryonic development in turkey, neuroblasts are visible at the ventrolateral margins of the spinal cord, and they will differentiate in multipolar neurons. At the 15th day of embryonic development glioblasts appear in accessory lobes. At the 16th day, accessory lobes achieve their final form and obtain first PAS-positive granules of glycogen. Glycogen accumulates in neuroglial cells, and the appearance of a lesser amount of glycogen in multipolar neurons is very interesting.

Keywords

turkey; Meleagris gallopavo; spinal cord; accessory lobes; multipolar neurons; neuroglial cells; glycogen; embryo

Hrčak ID:

109368

URI

https://hrcak.srce.hr/109368

Publication date:

23.6.1999.

Article data in other languages: croatian

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