The House-Brackmann score is a score to grade the degree of nerve damage in a facial nerve palsy. The measurement is determined by measuring the upwards (superior) movement of the mid-portion of the top of the eyebrow, and the outwards (lateral) movement of the angle of the mouth. Each reference point scores 1 point for each 0.25cm movement, up to a maximum of 1cm. The scores are then added together, to give a number out of 8.[1]
| Grade | Description | Measurement | Function % | Estimated Function % |
|---|---|---|---|---|
| I | Normal | 8/8 | 100 | 100 |
| II | Slight | 7/8 | 76-99 | 80 |
| III | Moderate | 5/8-6/8 | 51-75 | 60 |
| IV | Moderately Severe | 3/8-4/8 | 26-50 | 40 |
| V | Severe | 1/8-2/8 | 1-25 | 20 |
| VI | Total | 0/8 | 0 | 0 |