Vol 57, No 2 (1998)
ORIGINAL ARTICLES
Published online: 2000-02-08
Submitted: 2012-02-06
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The corticoclaustral connections in the rat studied by means of the fluorescent retrograde axonal transport method

Kowiański P, Dziewiątkowski J, Berdel B, Lipowska M, Moryś J
Folia Morphol 1998;57(2):85-92.
Vol 57, No 2 (1998)
ORIGINAL ARTICLES
Published online: 2000-02-08
Submitted: 2012-02-06

Abstract

The corticoclaustral connections in the rat were investigated by means of the method of the retrograde axonal transport of the fluorescent tracer (Fluoro-Gold; FG), The material consisted of 20 adult Wistar rats. The fluorescent tracer was injected into the anterior, middle or posterior parts of the claustrum. The retrogradely labeled neurons were detected in the layer VI of the neocortex. Injections of the tracer into the anterior part of the claustrum resulted in, labeling of the neurons in the motor cortex. After administration of the tracer into the middle part of the insular claustrum, labeled neurons were present both in the motor and somatosensory cortices, while the injections of the tracer into its posterior part resulted in labeling of neurons in the visual cortex. Administration of the fluorescent tracer into the insular claustrum of the rat resulted in labeling of the cortical neurons of the corresponding areas of both hemispheres, however, the contralateral projections seem to be less numerous than the ipsilateral. Our results confirm the existence of reciprocal connections of the claustrum with the neocortex and suggest its role in integration and modification of information reaching the neocortex.

Abstract

The corticoclaustral connections in the rat were investigated by means of the method of the retrograde axonal transport of the fluorescent tracer (Fluoro-Gold; FG), The material consisted of 20 adult Wistar rats. The fluorescent tracer was injected into the anterior, middle or posterior parts of the claustrum. The retrogradely labeled neurons were detected in the layer VI of the neocortex. Injections of the tracer into the anterior part of the claustrum resulted in, labeling of the neurons in the motor cortex. After administration of the tracer into the middle part of the insular claustrum, labeled neurons were present both in the motor and somatosensory cortices, while the injections of the tracer into its posterior part resulted in labeling of neurons in the visual cortex. Administration of the fluorescent tracer into the insular claustrum of the rat resulted in labeling of the cortical neurons of the corresponding areas of both hemispheres, however, the contralateral projections seem to be less numerous than the ipsilateral. Our results confirm the existence of reciprocal connections of the claustrum with the neocortex and suggest its role in integration and modification of information reaching the neocortex.
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Keywords

Claustrum. Connections; Cerebral cortex. Retrograde transport methods.

About this article
Title

The corticoclaustral connections in the rat studied by means of the fluorescent retrograde axonal transport method

Journal

Folia Morphologica

Issue

Vol 57, No 2 (1998)

Pages

85-92

Published online

2000-02-08

Bibliographic record

Folia Morphol 1998;57(2):85-92.

Keywords

Claustrum. Connections
Cerebral cortex. Retrograde transport methods.

Authors

Kowiański P
Dziewiątkowski J
Berdel B
Lipowska M
Moryś J

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