Postnatal development of the anterior ethmoidal nerve in cats: unmyelinated and myelinated nerve fiber analysis.
This is the first quantitative electron microscopic study of anterior ethmoidal nerve in adult and newborn cats. The adult nerve comprises about 1,000 myelinated fibers including A delta (65%) and A beta (35%) fibers and 6,000 unmyelinated fibers. At birth, only 27% of the adult myelinated fibers complement is already present. The immaturity of the nerve is discussed in relation to that of the sneeze reflex.
Wallois
F
F
Laboratoire de Neurophysiologie, CNRS URA 1331, Faculté de Médecine, Université de Picardie, Amiens, France.
Gros
F
F
Condamin
M
M
Macron
J M
JM
D000375:Aging / Q000502:physiology*; D000818:Animals; D000831:Animals, Newborn; D002415:Cats; D005005:Ethmoid Sinus / Q000294:innervation; D008854:Microscopy, Electron; D009412:Nerve Fibers / Q000502:physiology / Q000648:ultrastructure*; D009413:Nerve Fibers, Myelinated / Q000502:physiology / Q000648:ultrastructure*; D014276:Trigeminal Nerve / Q000254:growth & development* / Q000648:ultrastructure*