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• W2090116482 abstract "The cholinergic innervation of the interpeduncular nucleus was investigated by use of fluorescent tracer histology in combination with choline-O-acetyltransferase (ChAT) immunohistochemistry and acetylcholinesterase (AChE) pharmacohistochemistry. Following propidium iodide or Evans Blue infusion into the interpeduncular nucleus, brains were processed for co-localization of transported fluorescent label and ChAT and AChE. Control infusions of tracers were made into the ventral tegmental area. In order to delimit the course of putative cholinergic afferents to the interpeduncular nucleus from extra-habenular sources, knife cuts surrounding the habenular nuclei were performed. Somata containing propidium iodide that were highly immunoreactive for ChAT were found primarily in the vertical and horizontal limbs of the diagonal band, the magnocellular preoptic area, and the dorsolateral tegmental nucleus, also referred to as the laterodorsal tegmental nucleus. A few such co-labeled somata were also detected in the medial septal nucleus, substantia innominata, nucleus basalis, and pedunculopontine tegmental nucleus. A good correlation was observed between intensely-staining, AChE-containing and ChAT-positive neurons projecting to the interpeduncular nucleus from the aforementioned structures. Although the medial habenula contained numerous cells demonstrating transported label following interpeduncular infusion of fluorescent tracers, the ChAT-positivity associated with somata in that nucleus was weak compared to ChAT-like immunoreactivity in known cholinergic neurons in the basal forebrain and brainstem. Knife cuts that separated the habenular nuclei from the stria medullaris and neural regions lateral and posterior to those nuclei while leaving the fasciculus retroflexus intact resulted in a reduction of ChAT-like immunoreactivity in the medial habenular nucleus, fasciculus retroflexus, and interpeduncular nucleus. These data suggest (1) that the cholinergic innervation of the interpeduncular nucleus derives primarily from ChAT-positive cells in the basal forebrain and dorsolateral tegmental nucleus and (2) that putative cholinergic fibers having their origin in the medial habenula, if they exist, constitute a minor portion of the cholinergic input to the interpeduncular nucleus." @default.
• W2090116482 created "2016-06-24" @default.
• W2090116482 creator A5004202534 @default.
• W2090116482 creator A5063940434 @default.
• W2090116482 date "1985-01-01" @default.
• W2090116482 modified "2023-09-27" @default.
• W2090116482 title "Cholinergic systems in the rat brain: II. Projections to the interpeduncular nucleus" @default.
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• W2090116482 doi "https://doi.org/10.1016/0361-9230(85)90178-9" @default.
• W2090116482 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/2580607" @default.
• W2090116482 hasPublicationYear "1985" @default.
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