You might want to check out:
Jenny & Saper (1987). Organization of the facial nucleus and corticofacial
projections in the monkey. Neurology, 37, 930-939.
Kuypers, (1958). Corticobulbar connections to the pons and the lower
brain-stem in man. Brain, 81, 364-388.
Rich Andreatta
andreatt at infant1.sphs.indiana.edu