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Old 03-08-2010
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Anatomy Neck injury

After a road traffic accident a 24 year old male was brought to the hospital for management of several wounds and lacerations. The ER physician noticed that the biceps muscle stretch reflex is absent. Which of the following nerves likely to have been severed by this accident?

A- Radial nerve
B- Axillary nerve
C- Sciatic nerve
D- Musculocutaneous
E- Median nerve
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Old 03-09-2010
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Quote:
Originally Posted by Farazdaq View Post
After a road traffic accident a 24 year old male was brought to the hospital for management of several wounds and lacerations. The ER physician noticed that the biceps muscle stretch reflex is absent. Which of the following nerves likely to have been severed by this accident?

A- Radial nerve
B- Axillary nerve
C- Sciatic nerve
D- Musculocutaneous
E- Median nerve
I think it's D.
Why so ?
This reflex uses the biceps brachii muscle and brachialis muscles, which are flexors of the elbow. They are innervated by the musculocutaneous nerve. The origin of this reflex is C6-C8 in the spinal cord.
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Old 03-09-2010
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Quote:
Originally Posted by wahaha007 View Post
I think it's D.
Why so ?
This reflex uses the biceps brachii muscle and brachialis muscles, which are flexors of the elbow. They are innervated by the musculocutaneous nerve. The origin of this reflex is C6-C8 in the spinal cord.
I agree with you
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