Radiation Oncology/Toxicity/Facial nerve

Facial Nerve Toxicity



House-Brackmann Scale

Grade Definition
I Normal symmetrical function in all areas
II Slight weakness noticeable only on close inspection

Complete eye closure with minimal effort
Slight asymmetry of smile with maximal effort
Synkinesis barely noticeable, contracture, or spasm absent

III Obvious weakness, but not disfiguring

May not be able to lift eyebrow
Complete eye closure and strong but asymmetrical mouth movement with maximal effort
Obvious, but not disfiguring synkinesis, mass movement or spasm

IV Obvious disfiguring weakness

Inability to lift brow
Incomplete eye closure and asymmetry of mouth with maximal effort
Severe synkinesis, mass movement, spasm

V Motion barely perceptible

Incomplete eye closure, slight movement corner mouth
Synkinesis, contracture, and spasm usually absent

VI No movement, loss of tone, no synkinesis, contracture, or spasm