Using the cobalt labelling technique in the rat, mesencephalic afferent fibres were shown in all three divisions of the trigeminal nerve. The descending branches of mesencephalic trigeminal neurones extend to the 3rd cervical segment of the spinal cord. Collaterals of this tract terminate in the following structures: the supratrigeminal nucleus, the motor nuclei of V, VII and XII cranial nerves, the reticular formation, a distinct nucleus in the reticular formation and the solitary nucleus.
- cobalt labeling
- mesencephalic trigeminal nucleus
- trigeminal nerve
ASJC Scopus subject areas