Recovery from Bell’s palsy after treatment using uncultured umbilical cord-derived mesenchymal stem cells: A case report

Table 1 House-Brackmann facial nerve grading system

Grade	Description	Characteristics
1	Normal	Normal facial function in all areas
2	Mild dysfunction	Slight weakness noticeable upon close inspection; may have very slight synkinesis
3	Moderate dysfunction	Obvious, but not disfiguring, difference between two sides; noticeable but not severe synkinesis, contracture, or hemifacial spasm; complete eye closure with effort
4	Moderately severe dysfunction	Obvious weakness or disfiguring asymmetry; normal symmetry and tone at rest; incomplete eye closure
5	Severe dysfunction	Barely perceptible motion; asymmetry at rest
6	Total paralysis	No movement