## Anatomical Relationship of Facial Nerve and Parotid Gland **Key Point:** The facial nerve (CN VII) is the most important anatomical landmark of the parotid gland. It emerges from the stylomastoid foramen and enters the parotid gland, where it divides into its terminal branches. ### Structural Division The facial nerve divides the parotid gland into two functional parts: | Feature | Superficial Lobe | Deep Lobe | | --- | --- | --- | | **Location** | Lateral to facial nerve | Medial to facial nerve | | **Size** | Larger portion (~80% of gland) | Smaller portion (~20% of gland) | | **Extent** | Between mandible and SCM | Extends into lateral pharyngeal space | | **Clinical significance** | Palpable on face | Not directly palpable | ### Course of Facial Nerve in Parotid 1. Enters at stylomastoid foramen 2. Passes through parotid gland substance 3. Divides into 5 terminal branches: temporal, zygomatic, buccal, marginal mandibular, cervical 4. These branches exit the anterior border of the gland **Clinical Pearl:** During parotid surgery, the facial nerve must be identified and preserved. The tragal pointer and posterior belly of digastric are used as landmarks to locate the main trunk of the facial nerve. **High-Yield:** The facial nerve is the key anatomical landmark that divides the parotid into superficial and deep portions — this is tested frequently in anatomy and surgical exams. 
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