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Old 04-13-2010
Seetal's Avatar
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Question Skeletal Force Transmission!

A man pushes a piano across the floor. At the wrist, the force is transmitted from the carpal bones to the radius. At the elbow, the force is transmitted from the ulna to the humerus. Which of the following structures transmits the force from the radius to the ulna?
(A) Annular ligament
(B) Bicipital aponeurosis
(C) Flexor retinaculum
(D) Intermuscular septum
(E) Interosseous membrane
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Old 04-13-2010
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I am not so sure about this, but I'll give a shot, because nobody has dropped any suggestions yet .

I am between A & E. The annular ligament participates in the proximal radio-ulnar articulation and is responsible for the rotary movements of the RADIUS during pronation & suppination. On the other hand, if I am correct, the interossius ligament is one of the most powerful ligaments in the body and runs almost throughout the full length of radius and ulna. So my final pick would be E.

Of course, there is a possibility that none of the above is correct and that I am hallucinating! Waiting for your reliable answers!
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Old 04-13-2010
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I think its E...
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Old 04-13-2010
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It's E for sure. The interosseous membrane is between the ulna and radius, therefore it is what structurally supports force between them.

This was an old school Kaplan question.
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Old 04-14-2010
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Default yes E

u're all correct. E for sure. i got it totally wrong actually when i answered it first. looks like ill have to revise my anatomy again and fast!
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