Study on the Optimal Waveform Patterns of Electroacupuncture Targeted Intervention for Bell's Palsy Based on Surface Electromyography Characteristics

Inclusion Criteria for Bell's Palsy Subjects：

• Meet the above Bell's palsy diagnostic criteria;
• Age 18-65 years, either gender;
• Disease course in recovery phase (21 days ≤ course ≤ 6 months) and not recovered (FNGS 2.0 score >4);
• Voluntarily participate in this study and sign informed consent.

Inclusion Criteria for Healthy Subjects：

• Do not meet the above Bell's palsy diagnostic criteria;
• Age 18-65 years, either gender, matched to Bell's palsy subjects within 5 years for age and gender;
• Normal facial nerve function, FNGS 2.0 score = 4;
• Voluntarily participate in this study and sign informed consent.

Exclusion Criteria for Bell's Palsy Subjects：

• Facial trauma, skin lesions, or other diseases that may cause facial paralysis symptoms;
• Diagnosed with Ramsay Hunt syndrome (herpes zoster oticus);
• Bilateral facial paralysis;
• Previous history of facial paralysis;
• Facial synkinesis, contracture, or spasm already present;
• History of facial surgery;
• Uncontrolled diabetes, hypertension, severe cardiac, hepatic, or renal disease, cognitive impairment, aphasia, or mental disorders;
• Pacemaker use;
• Pregnant or lactating patients.

Exclusion Criteria for Healthy Subjects：

• Facial trauma, skin lesions, or other diseases that may affect facial muscle activity;
• Previous history of facial paralysis;
• History of facial surgery;
• Uncontrolled diabetes, hypertension, severe cardiac, hepatic, or renal disease, cognitive impairment, aphasia, or mental disorders;
• Pacemaker use;
• Pregnant or lactating patients.