Testing of facial nerve conduction after lower lip reconstruction

: Facial nerve conduction was tested after lip reconstruction from flaps of labial and buccal muscles. The neuromuscular activity in the flaps was maintained. The delay of electrical response was greater in case of buccal flaps than labial flaps. Conduction delay is explained by the authors as result of elongation of the route of the electrical impulse caused by cutting of a part of the rami of the parotid plexus and stretching or compression of nervous rami by the surrounding tissues.