| FV | Facial vein |
| AGN | Antegonial notch |
| CI | Confidence interval |
| CN V3 | Mandibular division of the trigeminal nerve |
| CN VII | Facial nerve (cranial nerve VII) |
| DAO | Depressor anguli oris |
| DLI | Depressor labii inferioris |
| FA | Facial artery |
| IBM | Inferior border of the mandible |
| MMB | Marginal mandibular branch of the facial nerve |
| PP | Pooled prevalence |
| SD | Standard deviation |
| SMAS | Superficial musculo-aponeurotic system |
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