Nigral axon terminals are in contact with parvicellular reticular neurons which project to the motor trigeminal nucleus in the rat

Brain Research
Y YasuiT Kishi

Abstract

We examined whether in the rat the descending fibers from the substantia nigra pars reticulata (SNr) were in contact with premotor neurons projecting to the motor trigeminal nucleus (Vm), using a combined anterograde and retrograde tracing technique. After ipsilateral injections of cholera toxin B subunit (CTb) into the Vm and biotinylated dextranamine (BDA) into the SNr, numerous CTb-labeled neurons were distributed bilaterally with slightly ipsilateral dominance in the parvicellular reticular formation (RFp), where many BDA-labeled axons with bouton-like varicosities were found bilaterally with a clear-cut ipsilateral dominance. The overlapping distribution of these labeled axons and neurons was more prominent in the rostral RFp than in the caudal RFp. Within the neuropil of the RFp, some of the BDA-labeled axons made synapses with the somata and proximal dendrites of CTb-labeled neurons. Thus, the present study demonstrated the existence of an indirect pathway from the SNr to the Vm, relayed by the RFp.

References

May 1, 1992·The Journal of Comparative Neurology·M E Bickford, W C Hall
Aug 1, 1988·Brain Research Bulletin·R B ChronisterL A Marco
Apr 10, 1983·The Journal of Comparative Neurology·N MizunoM Kudo
Nov 1, 1983·The Journal of Comparative Neurology·J B Travers, R Norgren
Jan 1, 1981·Neuroscience Letters·G ChevalierJ Féger

❮ Previous
Next ❯

Citations

Sep 5, 2009·Dysphagia·Norman A Leopold, Stephanie K Daniels
Dec 20, 2000·Brain Research·L W Swanson
Oct 12, 2005·The Journal of Comparative Neurology·Carolina CebriánLucía Prensa
Oct 18, 2005·The Journal of Comparative Neurology·Nobuhiko HatanakaMasahiko Takada

❮ Previous
Next ❯

Related Concepts

Related Feeds

Basal Ganglia

Basal Ganglia are a group of subcortical nuclei in the brain associated with control of voluntary motor movements, procedural and habit learning, emotion, and cognition. Here is the latest research.