Morphologically unusual feline spinocervical tract neurons.
Intracellular horseradish peroxidase studies of spinocervical tract neurons in the cat have demonstrated that they have dendritic arbors primarily confined to laminae III through V. In the present intracellular staining study of this class of neuron we retrieved one cell with its soma in lamina I which arborized in laminae I through III and another cell with a soma in lamina III and a dendritic arbor which extended from lamina I through V. These data indicate therefore that a small proportion of neurons forming the spinocervical tract do not have dendritic arbors that are confined to laminae III through V. These two cells were capable of receiving monosynaptic input from primary afferent fibers innervating mechanical nociceptors and C-fibers.
D000818:Animals; D002415:Cats / Q000033:anatomy & histology*; D003712:Dendrites; D006735:Horseradish Peroxidase; D009474:Neurons / Q000166:cytology*; D013116:Spinal Cord / Q000166:cytology*
D006735:Horseradish Peroxidase