Figure 5: Schematic diagram of brainstem showing pathway of facial fibers and site of lesion with types of facial involvement. (A) Produces contralateral central facial palsy (CFP) (B) nuclear lesion; ipsilateral peripheral facial palsy, (C) hypothetical loop before decussation; contralateral CFP (D) hypothetical loop in dorsolateral medulla; ipsilateral CFP – (1) Corticospinal tract, (2) corticobulbar tract (cortico facial fibers), (3) bilateral innervation to upper face, (4) hypothetical looping of supranuclear corticobulbar tract fibers