Grade | Description | Characteristics |
---|---|---|
I | Normal | Normal facial function in all areas |
II | Mild Dysfunction | Slight weakness noticeable on close inspection. Complete eye closure with minimal effort. Slight asymmetry of smile with maximal effort. |
III | Moderate Dysfunction | Obvious but not disfiguring difference between sides. Complete eye closure with effort. Mouth slightly asymmetric with maximal effort. |
IV | Moderately Severe Dysfunction | Obvious weakness and/or disfiguring asymmetry. Incomplete eye closure. Asymmetry of mouth with maximal effort. |
V | Severe Dysfunction | Only barely perceptible motion. Incomplete eye closure. Slight movement corner mouth. |
VI | Total Paralysis | No movement, loss of tone, no function. |
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