A 25-Year-Old Man Fractures His Right Tibia in a Motor

question 178

Multiple Choice

A 25-year-old man fractures his right tibia in a motor vehicle accident.  His right leg is fixed in a cast and he requires underarm crutches to ambulate.  Two weeks later, he comes to the clinic with right upper-extremity weakness and numbness.  He has no neck or arm pain.  The patient is concerned because he is right handed and cannot perform his duties as an electrician.  On neurologic examination, there is diminished strength on extension of the right wrist with an absent triceps reflex.  Injury to which of the following nerves is most likely responsible for this patient's symptoms?

• A)Accessory
• B)Axillary
• C)Long thoracic
• D)Median
• E)Radial
• F)Suprascapular

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Definitions:

Operant Conditioning

A simple form of learning in which an organism learns to engage in behavior that is reinforced.

Positive Reinforcer

A reinforcer that, when applied, increases the frequency of a behavior.

Bicycle Riding

The act of operating and balancing on a bicycle, which involves coordinating movement and maintaining stability.

Extra Time

Additional time allotted to complete a task or for an event to occur, often used in contexts like examinations or sports.