Postnatal development of phrenic motoneurons in the cat

William E. Cameron, Beverly S. Brozanski, Robert D. Guthrie

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The postnatal growth of phrenic motoneurons in the cat was studied using retrograde transport of horseradish peroxidase (HRP). The mean somal surface area of these developing motoneurons increased 2.5 times from day 3 to adult while the mean somal volume increased four-fold. This change in mean somal surface area during postnatal development was found to be correlated with the change in mean axonal conduction velocity measured from phrenic motoneurons.

Original languageEnglish
Pages (from-to)142-145
Number of pages4
JournalDevelopmental Brain Research
Issue number1
StatePublished - Jan 1 1990


  • Diaphragm
  • Innervation
  • Neuroanatomy
  • Respiration
  • Spinal cord


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