Organisation of cingulum bundle fibres connecting the anterior thalamic nuclei with the rodent anterior cingulate and retrosplenial cortices.
Cortico-thalamic
mouse
rat
thalamo-cortical
thalamus
Journal
Brain and neuroscience advances
ISSN: 2398-2128
Titre abrégé: Brain Neurosci Adv
Pays: United States
ID NLM: 101702599
Informations de publication
Date de publication:
Historique:
received:
06
07
2020
accepted:
17
08
2020
entrez:
23
9
2020
pubmed:
24
9
2020
medline:
24
9
2020
Statut:
epublish
Résumé
Despite considerable interest in the properties of the cingulum bundle, descriptions of the composition of this major pathway in the rodent brain have not kept pace with advances in tract tracing. Using complementary approaches in rats and mice, this study examined the dense, reciprocal connections the anterior thalamic nuclei have with the cingulate and retrosplenial cortices, connections thought to be major contributors to the rodent cingulum bundle. The rat data came from a mixture of fluorescent and viral tracers, some injected directly into the bundle. The mouse data were collated from the Allen Mouse Brain Atlas. The projections from the three major anterior thalamic nuclei occupied much of the external medullary stratum of the cingulum bundle, where they were concentrated in its more medial portions. These anterior thalamic projections formed a rostral-reaching basket of efferents prior to joining the cingulum bundle, with anteromedial efferents taking the most rostral routes, often reaching the genu of the corpus callosum, while anterodorsal efferents took the least rostral route. In contrast, the return cortico-anterior thalamic projections frequently crossed directly through the bundle or briefly joined the internal stratum of the cingulum bundle, often entering the internal capsule before reaching the anterior thalamus. These analyses confirm that anterior thalamic connections comprise an important component of the rodent cingulum bundle, while also demonstrating the very different routes used by thalamo-cortical and cortico-thalamic projections. This information reveals how the composition of the cingulum bundle alters along its length.
Identifiants
pubmed: 32964131
pii: 10.1177_2398212820957160
pmc: PMC7488606
Types de publication
Journal Article
Langues
eng
Pagination
2398212820957160Subventions
Organisme : Wellcome Trust
Pays : United Kingdom
Informations de copyright
© The Author(s) 2020.
Déclaration de conflit d'intérêts
Declaration of conflicting interests: The author(s) declared no potential conflicts of interest with respect to the research, authorship and/or publication of this article.
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