USMLE Forums banner
1 - 8 of 8 Posts

·
Registered
Joined
·
1,114 Posts
Discussion Starter · #1 · (Edited)
1. A visibly upset 15-year-old boy is brought to the emergency department because he punched a wall and now has pain in his hand. The physician tells the patient that he has broken his hand.
Which of the following is the most likely site of this patient's fracture?


A.Distal radius
B.Hamate
C.Metacarpals
D.Phalanges
E.Scaphoid
 

·
Registered
Joined
·
1,114 Posts
Discussion Starter · #2 ·
2. The most typical feature in the development of the head and neck is formed by the pharyngeal (brachial) arches. These arches appear during the fourth to fifth weeks of development and contribute to the characteristic external appearance of the embryo. One mesodermal derivative of a pharyngeal arch is a muscle that through its action draws the tympanic membrane medially, resulting in increased tension on the tympanic membrane.
Which of the following nerves provides the innervation to this mesodermal derivative?

A.Facial nerve
B.Glossopharyngeal nerve
C.Stylopharyngeal nerve
D.Trigeminal nerve
E.Vagus nerve
 

·
Registered
Joined
·
103 Posts
For the first question answer is c , it is called boxer fracture , it usually affects the 4th or 5th metacarpal neck , it results from striking an hard object with a fist.

for the second question I am not sure but it might be tensor tympani muscle derivative of 1st branchial arch , which is innervated by trigeminal Nerve ????
 

·
Registered
Joined
·
118 Posts
1. Metacarples. Boxers #
2. First pharyngeal arch = Trigeminal nerve. Mandibular division.(which has both motor and sensory)

Thanks:)
 

·
Registered
Joined
·
156 Posts
Q1. C Metacarpals ( from punched injury 1st n 2nd metacarpals and neck of the 5th metacarpal most likely will damaged. They have good blood supply so will also heal rapidly.
Q2. D trigeminal nerve supply first pharyngeal arch structures which includes tympanic membrane.
 

·
Registered
Joined
·
1,114 Posts
Discussion Starter · #7 ·
Ok guys next time I will not post such a cheap question. :)):)):)):)) You all got it.
It doesn't represent normal distribution curve.:)):)):)):))
Keep it up. You are all doing very well.
 
1 - 8 of 8 Posts
Top