Facial Palsy

Facial palsy is a condition involving weakness or paralysis of the facial muscles, typically caused by damage to the facial nerve (cranial nerve VII). Bell's palsy is the most common form, appearing suddenly and usually affecting one side of the face. Facial palsy can significantly impact speech production, particularly for bilabial consonants (/p/, /b/, /m/) and sibilants (/s/, /z/) that require precise lip control. For digital accessibility, individuals with facial palsy may experience reduced accuracy with voice-controlled interfaces and may benefit from alternative input methods during acute phases or severe cases.