NBDHE NBDHE Head and Neck Anatomy 5

Question 1

Which bone forms the posterior portion of the hard palate?

Accepted Answer

Palatine bone

Answer

The horizontal plates of the palatine bones form the posterior one-third of the hard palate, while the palatine processes of the maxillae form the anterior two-thirds.

Question 2

A patient presents with inability to wrinkle the forehead and drooping of the mouth corner on the right side. Which nerve is most likely injured?

Accepted Answer

Right facial nerve (CN VII)

Answer

Lower motor neuron injury to the facial nerve (CN VII) causes ipsilateral paralysis of ALL facial muscles on that side, including the forehead, distinguishing it from upper motor neuron lesions.

Question 3

The glossopharyngeal nerve (CN IX) provides taste sensation to which region of the tongue?

Accepted Answer

Posterior one-third

Answer

CN IX provides both taste and general sensation to the posterior one-third of the tongue via its lingual branches, including the circumvallate papillae.

Question 4

Which muscle is the primary retractor of the mandible?

Accepted Answer

Posterior fibers of the temporalis

Answer

The posterior fibers of the temporalis muscle run horizontally and retract the mandible after it has been protruded.

Question 5

The submandibular ganglion is associated with which cranial nerve for its preganglionic parasympathetic input?

Accepted Answer

CN VII via chorda tympani

Answer

Preganglionic parasympathetic fibers from the facial nerve (CN VII) travel via the chorda tympani to the lingual nerve, then synapse in the submandibular ganglion to supply the submandibular and sublingual glands.

NBDHE Test Practice Test

NBDHE Test Practice Test

NBDHE NBDHE Head and Neck Anatomy 5