Head and neck anatomy
Relate muscles, vessels, cranial nerves and fascial spaces to examination, anaesthesia, infection spread and surgery. The trigeminal nerve supplies most facial sensation.
Understand
Trace the trigeminal divisions, facial nerve branches, major vessels, salivary ducts, spaces and lymphatic drainage on a skull and clinical images. Relate the inferior alveolar, lingual and mental nerves to common procedures.
Assess
Localise symptoms before choosing imaging or anaesthesia. A sensory deficit, progressive swelling or facial weakness requires a wider differential than dental pain alone; anatomical variations and previous surgery change risk.
Apply
For an extraction or infection, identify neighbouring structures, likely routes of spread and what a complication would look like. Distinguish sensory from motor function and record a pre-operative baseline when nerve injury is a material risk.
Key distinctions
The maxillary artery, facial artery and venous drainage matter in bleeding and infection, while lymphatic drainage helps interpret cervical nodes. The mylohyoid attachment helps predict whether infection may involve the sublingual or submandibular space. Rehearse anatomy from both a dissection view and a clinical scenario, because a two-dimensional diagram can hide important depth relationships.
Think through a case
A lower molar infection with new submandibular swelling makes you trace the mylohyoid attachment and fascial spaces before deciding how urgently to escalate. Anatomy explains the route, but airway findings determine immediate safety.
The distinction to remember
Do not memorise isolated nerve names without linking them to sensory territory and procedure. Lingual and inferior alveolar nerve deficits differ in distribution, and facial nerve weakness is motor.
Test your recall
Which nerve supplies sensation to the mandibular teeth?
Show answer
The inferior alveolar nerve, a branch of V3.