Table 1. The House and Brackmann scale for the severity of peripheral facial nerve palsy.

Grade	Description	Finding at rest	Forehead innervation	Lid closure	Mouth innervation
I	normal	normal	normal	normal	normal
II	mild dysfunction	normal	reduced	nearly normal	nearly normal
III	moderate dysfunction	normal	still barely possible	still barely possible	reduced
IV	moderately severe dysfunction	normal	none	incomplete	asymmetrical
V	severe dysfunction	asymmetrical	none	incomplete	asymmetrical
VI	total paralysis	complete loss of tone	none	none	none