title: Phrenic motor nucleus of the guinea pig: dendrites are bundled without clustering of cell somas.
abstract: In this study, the phrenic motor nucleus of adult guinea pigs was characterized following retrograde transport of horseradish peroxidase. The phrenic motor nucleus was localized to cervical sections C4-C7 in the ventromedial portion of the ventral horn. We further analyzed the internal organization of the phrenic motor nucleus by calculating the spatial interval distribution for the labeled motor neurons and their dorsally projecting dendrites which extended perpendicular to the longitudinal axis of the nucleus. Although the phrenic motor neurons were not clustered, the dendrites occurred in bundles with a mean longitudinal distance between bundles of 165 micron (range, 40-350 micron).
authors.affiliation: Department of Physiology and Biophysics, University of Iowa, Iowa City 52242.
authors.forename: S M
authors.initials: SM
authors.lastname: Johnson
authors.forename: P A
authors.initials: PA
authors.lastname: Getting
mesh_terms: D000818:Animals; D003712:Dendrites / Q000648:ultrastructure*; D006168:Guinea Pigs / Q000033:anatomy & histology*; D006735:Horseradish Peroxidase; D066298:In Vitro Techniques; D009046:Motor Neurons / Q000166:cytology* / Q000648:ultrastructure; D010791:Phrenic Nerve / Q000166:cytology* / Q000648:ultrastructure
chemical_list: D006735:Horseradish Peroxidase