What Is the Trigeminal Nucleus?

The midbrain nucleus of the human trigeminal nerve extends from the upper end of the main nucleus of the senses to the plane of the upper midbrain, immediately adjacent to the outer side of the blue nucleus nucleus. It is a narrow and loose nucleus, about 22 millimeters long. Neurons, in the cross section, this nucleus is located in the upper part of the fourth ventricle and the lateral margin of the central gray matter of the midbrain, and the dorsal side of the trigeminal motor nucleus.