open access

Vol 61, No 4 (2002)
ORIGINAL ARTICLES
Published online: 2002-08-29
Submitted: 2012-02-06
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The neuronal structure of the inferior colliculus in the bank vole (Clethrionomys glareolus) - Golgi and Nissl studies

Janusz Najdzion, Barbara Wasilewska, Stanisław Szteyn
Folia Morphol 2002;61(4):299-304.

open access

Vol 61, No 4 (2002)
ORIGINAL ARTICLES
Published online: 2002-08-29
Submitted: 2012-02-06

Abstract

The inferior colliculus (IC) of the bank vole is made up of 3 nuclei: the external and pericentral nucleus, which are located on the outer border of the IC, and the central nucleus, which is the largest part of IC and shows a laminated structure. On the basis of various morphological criteria 5 types of neurons have been distinguished in the bank vole IC: 1. The rounded cells (perikarya 10-15 µm) with 2–4 primary dendritic trunks. The dendritic tree has a spindle-like shape. The axon emerges from the soma or from the proximal portion of a dendrite. 2. The fusiform neurons (17-20 µm) with 2 primary dendrites arising from both poles of the perikaryon. The dendritic tree has the same shape as the previous type. The axon originates from the proximal dendritic trunk. The rounded and fusiform cells constitute the main neuronal type. 3. The pear-shaped neurons (10–13 µm) with 2 main stems or rarely 1. The axon emerges from the perikaryon or seldom from the dendritic trunk. 4. The multipolar cells (18–23 µm), which have from 4 to 6 primary dendrites radiating in all directions. The dendritic tree has a spherical shape. The axon emerges either from the proximal stem or directly from the soma. 5. The triangular neurons (15–18 µm) with 3 primary dendritic trunks. The axon originates from the perikaryon. The triangular cells are the least numerous. All types of neurons in the bank vole IC bear spines and protrusions.

Abstract

The inferior colliculus (IC) of the bank vole is made up of 3 nuclei: the external and pericentral nucleus, which are located on the outer border of the IC, and the central nucleus, which is the largest part of IC and shows a laminated structure. On the basis of various morphological criteria 5 types of neurons have been distinguished in the bank vole IC: 1. The rounded cells (perikarya 10-15 µm) with 2–4 primary dendritic trunks. The dendritic tree has a spindle-like shape. The axon emerges from the soma or from the proximal portion of a dendrite. 2. The fusiform neurons (17-20 µm) with 2 primary dendrites arising from both poles of the perikaryon. The dendritic tree has the same shape as the previous type. The axon originates from the proximal dendritic trunk. The rounded and fusiform cells constitute the main neuronal type. 3. The pear-shaped neurons (10–13 µm) with 2 main stems or rarely 1. The axon emerges from the perikaryon or seldom from the dendritic trunk. 4. The multipolar cells (18–23 µm), which have from 4 to 6 primary dendrites radiating in all directions. The dendritic tree has a spherical shape. The axon emerges either from the proximal stem or directly from the soma. 5. The triangular neurons (15–18 µm) with 3 primary dendritic trunks. The axon originates from the perikaryon. The triangular cells are the least numerous. All types of neurons in the bank vole IC bear spines and protrusions.
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Keywords

inferior colliculus; types of neurons; bank vole

About this article
Title

The neuronal structure of the inferior colliculus in the bank vole (Clethrionomys glareolus) - Golgi and Nissl studies

Journal

Folia Morphologica

Issue

Vol 61, No 4 (2002)

Pages

299-304

Published online

2002-08-29

Bibliographic record

Folia Morphol 2002;61(4):299-304.

Keywords

inferior colliculus
types of neurons
bank vole

Authors

Janusz Najdzion
Barbara Wasilewska
Stanisław Szteyn

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