Neurons in the guinea pig (Cavia porcellus) lateral lumbosacral spinal cord project to the central part of the lateral periaqueductal gray matter

Rutger Kuipers*, Esther Marije Klop

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    6 Citations (Scopus)

    Abstract

    In order to micturate successfully, information from the bladder has to be conveyed to the brainstem. In most experimental animals, this information is relayed, via the lumbosacral spinal cord, to the periaqueductal gray matter (PAG). Although the rat is the most used experimental animal in neurourological research, urodynamic studies show that guinea pig may be a better small experimental animal because its urodynamic profile is, in contrast to that of a rat, similar to that of humans. Therefore, the present study, using anterograde and retrograde tracing, was performed to determine whether the lumbosacral spinal cord projects to the PAG in guinea pig. Results show that neurons in the lateral part of the lumbosacral spinal cord project to the central parts of the PAG. This pathway may convey information about the level of bladder filling to the PAG.

    Original languageEnglish
    Pages (from-to)43-50
    Number of pages8
    JournalBrain Research
    Volume1101
    DOIs
    Publication statusPublished - 26-Jul-2006

    Keywords

    • micturition
    • bladder
    • visceroception
    • limbic system
    • spinomesencephalic
    • PONTINE MICTURITION CENTER
    • SACRAL PARASYMPATHETIC NUCLEUS
    • INHIBITORY BLADDER RESPONSES
    • EXTERNAL URETHRAL SPHINCTER
    • LOWER URINARY-TRACT
    • HORSERADISH-PEROXIDASE
    • ULTRASTRUCTURAL EVIDENCE
    • IMMUNOREACTIVE NEURONS
    • PREGANGLIONIC NEURONS
    • BARRINGTONS-NUCLEUS

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