Heterogeneity of neurons in the subnucleus interpolaris of the cat.
Fluorescent dyes were used to determine if neurons in the feline subnucleus interpolaris of the spinal trigeminal nucleus project to more than one target via axon collaterals. Either Fast Blue or True Blue was injected into the ventrobasal thalamus while Nuclear Yellow later was deposited into either the principal trigeminal nucleus or the cerebellum. In general, numerous neurons in the subnucleus interpolaris were labeled by a single dye after these injections, but only a few were labeled with two dyes, and the latter only after the combination of injections were into the thalamus and the principal nucleus on the opposite side. These data suggest that independent populations of neurons in the subnucleus interpolaris project to these targets.
D000818:Animals; D002415:Cats; D002531:Cerebellum / Q000033:anatomy & histology*; D009434:Neural Pathways / Q000033:anatomy & histology; D013787:Thalamic Nuclei / Q000033:anatomy & histology*; D014278:Trigeminal Nuclei / Q000033:anatomy & histology* / Q000166:cytology