ɐn ˈɪndʒɚɹi tə ðɪs nˈɜːv dˈʊɹɹɪŋ ɐ sˈɜːdʒɪkəl pɹəsˈiːdʒɚ kæn dɪstˈɔːɹt ðɪ ɛkspɹˈɛʃən ʌvðə smˈaɪl æz wˈɛl æz ˈʌðɚ fˈeɪʃəl ɛkspɹˈɛʃənz.
An injury to this nerve during a surgical procedure can distort the expression of the smile as well as other facial expressions.