Vol 59, No 3 (2000)
Original article
Submitted: 2012-02-06
Published online: 2000-07-06
The different patterns of maturation of the claustrocortical connections in a rabbit
Przemysław Kowiański, Jerzy Dziewiątkowski, Zbigniew Karwacki, Janusz Moryś
Folia Morphol 2000;59(3):193-200.
Vol 59, No 3 (2000)
ORIGINAL ARTICLES
Submitted: 2012-02-06
Published online: 2000-07-06
Abstract
The quantitative analysis of the claustrocortical connections labeled with the fluorescent retrograde tracer Fluoro-Gold (FG) was conducted on 90 rabbits subdivided into the following age groups (P2, P7, P14, P21, P30, P60, P90, P120, P180). The equal volumes of retrograde fluorescent tracer FluoroGold (FG) were injected into the selected regions of the motor or somatosensory cortices. The volume of the dorsal part of the claustrum, total number of projecting neurons, numerical density and percentage distribution of projecting neurons were estimated by means of the unbiased stereological methods. The claustrocortical connections both with the motor and somatosensory areas in a rabbit are established in the postnatal life. The parts of the claustrum occupied by the motor and somatosensory projection zones as well as the morphology of the cortically projecting neurons do not reveal characteristic changes during the studied period. The significant decrease of the total number and numerical density of cortically projecting neurons as well as the increase of the claustral volume may reflect the process of adjustment of the claustrum to its modulatory function upon corresponding cortical areas. The intensity of the claustral connections with the motor and somatosensory cortices reveals significant difference during the studied period, being higher for the motor projection. It may be assumed that the claustrocortical connections established before birth undergosignificant quantitative changes during postnatal development.
Abstract
The quantitative analysis of the claustrocortical connections labeled with the fluorescent retrograde tracer Fluoro-Gold (FG) was conducted on 90 rabbits subdivided into the following age groups (P2, P7, P14, P21, P30, P60, P90, P120, P180). The equal volumes of retrograde fluorescent tracer FluoroGold (FG) were injected into the selected regions of the motor or somatosensory cortices. The volume of the dorsal part of the claustrum, total number of projecting neurons, numerical density and percentage distribution of projecting neurons were estimated by means of the unbiased stereological methods. The claustrocortical connections both with the motor and somatosensory areas in a rabbit are established in the postnatal life. The parts of the claustrum occupied by the motor and somatosensory projection zones as well as the morphology of the cortically projecting neurons do not reveal characteristic changes during the studied period. The significant decrease of the total number and numerical density of cortically projecting neurons as well as the increase of the claustral volume may reflect the process of adjustment of the claustrum to its modulatory function upon corresponding cortical areas. The intensity of the claustral connections with the motor and somatosensory cortices reveals significant difference during the studied period, being higher for the motor projection. It may be assumed that the claustrocortical connections established before birth undergosignificant quantitative changes during postnatal development.
Keywords
claustrum; claustrocortical connections; rabbit; retrograde
Title
The different patterns of maturation of the claustrocortical connections in a rabbit
Journal
Folia Morphologica
Issue
Vol 59, No 3 (2000)
Article type
Original article
Pages
193-200
Published online
2000-07-06
Page views
480
Article views/downloads
1314
Bibliographic record
Folia Morphol 2000;59(3):193-200.
Keywords
claustrum
claustrocortical connections
rabbit
retrograde
Authors
Przemysław Kowiański
Jerzy Dziewiątkowski
Zbigniew Karwacki
Janusz Moryś
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