Primary and secondary sensory trigeminal projections in a cyprinid teleost
 carp (Cyprinus carpio)

Hao-Gang Xue
Chun-Ying Yang
Hironobu Ito
Naoyuki Yamamoto
Hitoshi Ozawa

Primary and secondary sensory trigeminal projections were studied by means of tract-tracing methods in a cyprinid teleost
 the carp. Tracer injections into the trigeminal nerve root labeled terminals in the ipsilateral principal sensory trigeminal nucleus
 descending trigeminal nucleus
 medial funicular nucleus
 facial lobe
 and medial part of posterior lateral valvular nucleus. The principal sensory trigeminal nucleus is considered a major origin of the secondary sensory trigeminal projections in teleosts. To investigate the secondary sensory trigeminal projections
 tracer injections were performed into the principal sensory trigeminal nucleus. The present study suggests that the principal sensory trigeminal nucleus projects to the bilateral ventromedial thalamic nucleus
 periventricular pretectal nucleus
 stratum album centrale of the optic tectum
 caudomedial region of lateral preglomerular nucleus
 ventrolateral nucleus of semicircular torus
 medial part of rostral and posterior lateral valvular nucleus
 oculomotor nucleus
 trochlear nucleus
 trigeminal motor nucleus
 facial motor nucleus
 superior and inferior reticular formation
 descending trigeminal nucleus
 medial funicular nucleus
 inferior olive
 and to the contralateral sensory trigeminal nucleus. These observations indicate that the primary and secondary trigeminal sensory projections of a cyprinid teleost
 the carp
 are similar to those in percomorph teleosts. c 2006 Wiley-Liss
 Inc.

Journal of Comparative Neurology

499

4

10.1002/cne.21130

https://doi.org/10.1002/cne.21130
https://www.ncbi.nlm.nih.gov/pubmed/17029257