A 10-year-old male presents to the pediatrician because of problems while eating

[Oak]

A 10-year-old male presents to the pediatrician because of problems while eating. He can chew food but has problems swallowing the chewed pieces, and feels them in his throat. A radiographic study is performed that shows normal musculature but abnormal esophageal peristalsis. No masses are seen. Which of the following nerves should be tested for abnormalities?

A. Hypoglossal and phrenic

B. Hypoglossal and splanchnic

C. Glossopharyngeal and vagus

D. Phrenic and vagus

E. Splanchnic and vagus

[mustafa]

dears.....can you please help me by uploading mcqs for frcr exam(radiology)...... can you also uplaod books related to dentistry....thanks alot

[Oak]

mustafa, i think csf has posted some information for you at
http://www.xenomed.com/forums/plab-m...972-dears.html

Hey gusy c'mon yarss somebody answer the clinical MCQ 9.

[kenneth masamaro]

Originally Posted by Oak

A 10-year-old male presents to the pediatrician because of problems while eating. He can chew food but has problems swallowing the chewed pieces, and feels them in his throat. A radiographic study is performed that shows normal musculature but abnormal esophageal peristalsis. No masses are seen. Which of the following nerves should be tested for abnormalities?

A. Hypoglossal and phrenic

B. Hypoglossal and splanchnic

C. Glossopharyngeal and vagus

D. Phrenic and vagus

E. Splanchnic and vagus

I think your answer would be C. glossopharyngeal nerve supplies the stylopharyngeus muscle which elevates the pharynx during swallowing and talking while vagus modulates peristalsis in the esophagus.

[Oak]

The correct answer is E. The upper 2/3 of the esophagus contains striated muscle. It is derived from the pharyngeal arches and innervated by the vagus nerve (CN X). The lower 1/3 contains smooth muscle from splanchnic mesoderm and is innervated by the splanchnic plexus.

The hypoglossal nerve (choices A and B), or CN XII, moves the tongue.

The phrenic nerve (choices A and D), derived from C3, C4, and C5, innervates the muscle of the diaphragm.

The glossopharyngeal nerve (choice C), or CN IX, functions in taste, swallowing, and salivation, as well as monitoring the activity of the carotid body.