ADEX Head and Neck Anatomy 1 — Questions and Answers
Question 1: Which cranial nerve provides primary sensory innervation to the teeth and periodontium?
- CN V (Trigeminal) (Correct answer)
- CN VII (Facial)
- CN IX (Glossopharyngeal)
- CN XII (Hypoglossal)
Correct answer: CN V (Trigeminal)
The trigeminal nerve (CN V) provides primary sensory innervation to the teeth, periodontium, and oral mucosa through its maxillary and mandibular divisions.
Question 2: The parotid duct (Stensen's duct) opens into the oral cavity opposite which tooth?
- Maxillary first premolar
- Maxillary second molar (Correct answer)
- Maxillary first molar
- Maxillary canine
Correct answer: Maxillary second molar
Stensen's duct opens into the oral vestibule on a small papilla opposite the maxillary second molar.
Question 3: Which muscle of mastication is the most superficial and is easily palpated externally over the ramus of the mandible?
- Medial pterygoid
- Temporalis
- Masseter (Correct answer)
- Lateral pterygoid
Correct answer: Masseter
The masseter is the most superficial muscle of mastication and a powerful jaw closer, attaching from the zygomatic arch to the lateral ramus of the mandible.
Question 4: The inferior alveolar nerve is a branch of which division of the trigeminal nerve?
- Ophthalmic (V1)
- Maxillary (V2)
- Mandibular (V3) (Correct answer)
- Both V2 and V3
Correct answer: Mandibular (V3)
The inferior alveolar nerve is a branch of the mandibular division (V3) of the trigeminal nerve, providing sensation to the mandibular teeth and chin.
Question 5: Which lymph node group is the primary drainage site for the tip of the tongue?
- Submandibular nodes
- Submental nodes (Correct answer)
- Jugulo-omohyoid nodes
- Parotid nodes
Correct answer: Submental nodes
The submental lymph nodes drain the tip of the tongue, lower lip, and chin area, and are located between the two anterior bellies of the digastric muscle.
Question 6: The posterior superior alveolar foramina, through which the PSA nerve and vessels pass, are located on which surface of the maxilla?
- Anterior (facial) surface
- Nasal surface
- Infratemporal (posterior) surface of the maxillary tuberosity (Correct answer)
- Orbital surface
Correct answer: Infratemporal (posterior) surface of the maxillary tuberosity
The posterior superior alveolar nerve and vessels enter the maxilla through small foramina on the infratemporal surface of the maxillary tuberosity.
Question 7: The facial artery, which supplies the face and lips, is a direct branch of which major vessel?
- Internal carotid artery
- External carotid artery (Correct answer)
- Subclavian artery
- Maxillary artery
Correct answer: External carotid artery
The facial artery arises directly from the external carotid artery and winds around the mandible to supply the face, including the lips and nose.
ADEX Head and Neck Anatomy 1
Which cranial nerve provides primary sensory innervation to the teeth and periodontium?