title: Topographic segregation of genioglossus motoneurons in the neonatal rat.
abstract: The location of the motoneurons that innervate the main tongue protrusor muscle, genioglossus, was studied in the 1-2 day old, 10-14 day old and adult rat. Following injection of the retrograde axonal tracer WGA-HRP into the genioglossus muscle, labeled neurons were localized to a discrete column within the ventral division of the hypoglossal nucleus in both the neonatal and adult rats. These results demonstrate an adult pattern of genioglossus innervation in the neonatal rat.
authors.affiliation: Section of Population Biology, Morphology, and Genetics, Brown University, Providence, RI 02912.
authors.forename: A J
authors.initials: AJ
authors.lastname: Sokoloff
mesh_terms: D000375:Aging / Q000502:physiology; D000818:Animals; D000831:Animals, Newborn; D006735:Horseradish Peroxidase; D007002:Hypoglossal Nerve / Q000166:cytology*; D009046:Motor Neurons / Q000166:cytology*; D024510:Muscle Development; D009132:Muscles / Q000294:innervation; D051381:Rats; D017208:Rats, Wistar; D014059:Tongue / Q000254:growth & development / Q000294:innervation; D018998:Wheat Germ Agglutinin-Horseradish Peroxidase Conjugate; D014909:Wheat Germ Agglutinins
chemical_list: D018998:Wheat Germ Agglutinin-Horseradish Peroxidase Conjugate; D014909:Wheat Germ Agglutinins; D006735:Horseradish Peroxidase