open access
Qualitative and quantitative differences in the motor and somatosensory cortical projections of the rat claustrum — combined retrograde transport and stereological studies
open access
Abstract
The mean number of claustral neurons retrogradely labeled after tracer injections into the motor cortex significantly outnumbered that from the somatosensory cortical area (p<0.01). Similarly, the mean value of the numerical density of the retrogradely labeled neurons was significantly higher for the motor projection zone in the claustrum, than for the somatosensory projection zone (p<0.001). The contralateral claustral projections, both into the motor and somatosensory cortices, were considerably lower in number than the ipsilateral ones.
These findings indicate that: (1) the claustral projections to the various cortical regions seem to be differentiated (2) the distribution of claustral neurons projecting to the motor and somatosensory neocortical areas shows an anteroposterior gradient, (3) the claustrum of the rat appears to be more closely related to the motor than to the somatosensory system, (4) the rat claustrum seems to function more as a satellite than a relay structure in relationship to the cerebral cortex.
Abstract
The mean number of claustral neurons retrogradely labeled after tracer injections into the motor cortex significantly outnumbered that from the somatosensory cortical area (p<0.01). Similarly, the mean value of the numerical density of the retrogradely labeled neurons was significantly higher for the motor projection zone in the claustrum, than for the somatosensory projection zone (p<0.001). The contralateral claustral projections, both into the motor and somatosensory cortices, were considerably lower in number than the ipsilateral ones.
These findings indicate that: (1) the claustral projections to the various cortical regions seem to be differentiated (2) the distribution of claustral neurons projecting to the motor and somatosensory neocortical areas shows an anteroposterior gradient, (3) the claustrum of the rat appears to be more closely related to the motor than to the somatosensory system, (4) the rat claustrum seems to function more as a satellite than a relay structure in relationship to the cerebral cortex.
Keywords
claustrum; claustrocortical connections; rat; retrograde trans-
Title
Qualitative and quantitative differences in the motor and somatosensory cortical projections of the rat claustrum — combined retrograde transport and stereological studies
Journal
Issue
Article type
Original article
Pages
111-119
Published online
2000-02-16
Page views
514
Article views/downloads
1525
Bibliographic record
Folia Morphol 2000;59(2):111-119.
Keywords
claustrum
claustrocortical connections
rat
retrograde trans-
Authors
Przemysław Kowiański
Janusz Moryś
Marcin Sadowski
Jerzy Dziewiątkowski