Rhombo-mesencephalic connections in the fast conducting electrosensory system of the mormyrid fish, Gnathonemus petersii. An HRP study.

Using retrograde horseradish peroxidase (HRP) axonal transport direct rhombo-mesencephalic connections were revealed in Gnathonemus petersii. By HRP injection in the neuropil of the extrolateral mesencephalic ganglion the neurons of the lateral line lobe nucleus were labeled. The pathway is mainly composed of crossed fibers.