A nerve near the Superior Thyroid Artery! - USMLE Forums
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Old 10-09-2012
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Thyroid A nerve near the Superior Thyroid Artery!

A 38 yrs male has had thyroid surgery to remove PCT. A nerve very near to Superior Thyroid Artery is damaged during the surgery. What function is lost in this patient?
1) Relaxing vocal cords
2) Rotating the Arytenoid cartilage
3) Tensing vocal cord
4) Widening the rima glottidis
5) Abducting the vocal cords
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  #2  
Old 10-09-2012
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Default 3

3..superior laryngeal n.lesion--->hoarse sounds
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Old 10-09-2012
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3) Tensing vocal cord
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Old 10-09-2012
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Seems External superficial nerve injury-
but not sure about its innervation
Just guessing
3. Tensing vocal cord
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Old 10-10-2012
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Correct Answer

Yes... 3.

The External laryngeal nerve accompanies Superior Thyroid Artery. All laryngeal muscles (except cricothyroid = Ext Laryngeal Nerve) supplied by recurrent laryngeal nerve. Cricothyroid is major tensor of vocal cord. The anterior part of vocalis muscle can tense vocal cord, and its post part can relax vocal cord. The lateral cricoarytenoid muscle rotates vocal process of arytenoid medially, closing rima glottidis. The rima glottidis is opened by rotating vocal process of arytenoid cartilage laterally by post cricoarytenoid muscle.
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Old 10-10-2012
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sup thyroid a===sup laryngeal br of vagus nerve====cricothyroid====tense vocal cord
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the answer is 3
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Anatomy-, Cardiovascular-, Endocrine-, Step-1-Questions

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