title: Distribution of dendrites from longissimus lumborum motoneurons stained intracellularly with biocytin in adult cats.
abstract: The three-dimensional distribution of dendrites from motoneurons innervating longissimus lumborum (Long Motoneurons) in the L4 spinal segment was examined in the adult cat using intracellular staining techniques. Long Motoneurons were electrophysiologically identified, stained with injection of biocytin and reconstructed from serial histological sections. Somas of Long Motoneurons were mainly located in the lateral-ventral area of the ventral horn. The dendritic distribution followed an orderly pattern in all motoneurons examined. Long Motoneurons showed a multi-directional distribution of dendrites, and the dendritic distribution pattern varied depending on the motoneuron. All studied motoneurons distributed dendrites from the spine into the white matter. The most significant morphological characteristic of the Long Motoneurons was the variation in their dendritic distribution. No relationship was observed between the effects of peripheral afferent inputs from the hindlimb and morphological characteristics of motoneurons.
authors.affiliation: The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, Japan.
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Wada
authors.forename: Megumi
authors.initials: M
authors.lastname: Goto
authors.forename: Keiko
authors.initials: K
authors.lastname: Mitsuoka
authors.forename: Akihisa
authors.initials: A
authors.lastname: Suwa
authors.forename: Futoshi
authors.initials: F
authors.lastname: Mori
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Miyata
authors.forename: Naomi
authors.initials: N
authors.lastname: Wada
mesh_terms: D000818:Animals; D002415:Cats; D004396:Coloring Agents; D003655:Decerebrate State / Q000473:pathology / Q000662:veterinary; D003712:Dendrites / Q000648:ultrastructure*; D005260:Female; D006614:Hindlimb / Q000294:innervation; D008239:Lysine / Q000031:analogs & derivatives; D008297:Male; D009046:Motor Neurons / Q000166:cytology*; D018482:Muscle, Skeletal / Q000294:innervation
chemical_list: D004396:Coloring Agents; C013411:biocytin; D008239:Lysine