The lumbar cord location of the motoneurons innervating psoas and iliacus muscles: a single and double labeling study in the female Syrian golden hamster

Peter O Gerrits, Jose Boers, G Holstege

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    The spinal cord location of the motoneurons innervating the psoas and iliacus muscles was determined in the golden hamster. The results of single and double labeling studies, using the retrograde tracers horseradish peroxidase (HRP) and cholera toxin B-subunit (CTB), showed that both psoas and iliacus motoneurons were present ventrolaterally in the ventral horn in the caudal L1 to rostral L5 lumbar spinal segments with their motoneurons intermingled in one cell group. Further retrograde tracing studies demonstrated abdominal muscle motoneurons ventrolaterally in the ventral horn of the LI and upper L2 segments. Double labeling experiments revealed that at these levels (caudal L1 and rostral L2), the abdominal muscle motoneurons were located dorsomedial to the psoas and iliacus motoneurons. (C) 1997 Elsevier Science Ireland Ltd.

    Original languageEnglish
    Pages (from-to)125-128
    Number of pages4
    JournalNeuroscience Letters
    Issue number2-3
    Publication statusPublished - 21-Nov-1997


    • sexual behavior
    • motor control
    • obliquus externus
    • obliquus internus
    • cholera toxin B-subunit
    • horseradish peroxidase
    • CAT

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