Anatomy & Histology · single question
Trauma to the infraorbital region — which nerve is affected?
Show answer and explanation
Correct answer: A. Infraorbital nerve (V2 branch)
Infraorbital nerve (A), which is a branch of the maxillary nerve (CN V2). The infraorbital nerve exits the skull through the infraorbital foramen (below the orbital rim) and provides sensory innervation to:
• Lower eyelid
• Side of the nose
• Upper lip
• Anterior cheek
• Upper anterior teeth and gingiva (via anterior and middle superior alveolar branches)
• Trauma to this region (e.g., zygomatic/orbital floor fractures) commonly causes paresthesia or anesthesia in the distribution described above.
• Clinical relevance: Infraorbital nerve block is the most common nerve block for maxillary anterior restorations and is the target for maxillary sinus injections.
• Lower eyelid
• Side of the nose
• Upper lip
• Anterior cheek
• Upper anterior teeth and gingiva (via anterior and middle superior alveolar branches)
• Trauma to this region (e.g., zygomatic/orbital floor fractures) commonly causes paresthesia or anesthesia in the distribution described above.
• Clinical relevance: Infraorbital nerve block is the most common nerve block for maxillary anterior restorations and is the target for maxillary sinus injections.
Practice Anatomy & Histology questions Anatomy & Histology study notes