Neurones in the midbrain periaqueductal grey send collateral projections to nucleus raphe magnus and the rostral ventrolateral medulla in the rat

Projections to the rostral ventrolateral medulla (RVLM) and nucleus raphe magnus (NRM) appear to originate from neurones with overlapping distributions in the periaqueductal grey (PAG) as demonstrated by the retrograde transport of red and green fluorescent latex microspheres. Furthermore, double-la...

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Bibliographic Details
Published in:Brain research 1996-09, Vol.733 (1), p.138-141
Main Authors: Hudson, P.M., Lumb, B.M.
Format: Article
Language:English
Subjects:
Animals
Brainstem
Fluorescent Dyes
Fluorescent microsphere
Male
Medulla Oblongata - cytology
Microspheres
Neural Pathways
Neurons - cytology
Periaqueductal Gray - cytology
Periaqueductal grey
Raphe Nuclei - cytology
Rat
Rats
Retrograde tracing
Ventral medulla
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Summary:Projections to the rostral ventrolateral medulla (RVLM) and nucleus raphe magnus (NRM) appear to originate from neurones with overlapping distributions in the periaqueductal grey (PAG) as demonstrated by the retrograde transport of red and green fluorescent latex microspheres. Furthermore, double-labelling studies demonstrated collateral projections from individual neurones in the PAG to the RVLM and NRM. This anatomical arrangement may allow interactions between descending control systems during specific behaviours.
ISSN:0006-8993
1872-6240
DOI:10.1016/0006-8993(96)00784-6