ADEX Head and Neck Anatomy 2

Question 1

Which division of the trigeminal nerve passes through the foramen ovale?

Accepted Answer

Mandibular division (V3)

Answer

The mandibular division (V3) of the trigeminal nerve exits the cranium through the foramen ovale in the greater wing of the sphenoid bone.

Question 2

The posterior superior alveolar (PSA) nerve typically innervates which maxillary teeth?

Accepted Answer

The second and third molars, plus the distobuccal and palatal roots of the first molar

Answer

The PSA nerve innervates the maxillary second and third molars plus the distobuccal and palatal roots of the first molar; the mesiobuccal root is typically innervated by the middle superior alveolar (MSA) nerve.

Question 3

The buccinator muscle receives its motor innervation from which cranial nerve?

Accepted Answer

Facial nerve (CN VII)

Answer

The buccinator is a muscle of facial expression and receives motor innervation from the buccal branch of the facial nerve (CN VII), like all muscles of facial expression.

Question 4

Which muscle forms the muscular floor of the oral cavity, creating a sling between the two sides of the mandible?

Accepted Answer

Mylohyoid

Answer

The mylohyoid muscle forms the primary muscular floor of the oral cavity, attaching along the mylohyoid line on the inner surface of the mandible and meeting at a median raphe.

Question 5

The mental nerve, providing sensation to the chin and lower lip, exits the mandible through which structure?

Accepted Answer

Mental foramen

Answer

The mental nerve exits the mandible through the mental foramen, typically located below the apex of the mandibular second premolar, providing sensation to the chin and lower lip.

ADEX - Dental Hygiene Exam Practice Test

ADEX - Dental Hygiene Exam Practice Test

ADEX Head and Neck Anatomy 2