This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
Cadaver like position of vocal cords is seen in 
Select and explain. 
A. Both superior laryngeal nerve palsy, B. Both recurrent laryngeal nerve palsy, C. Both external laryngeal nerve palsy, D. Both internal laryngeal nerve palsy
B: Both recurrent laryngeal nerve palsy
Answer: B: Both recurrent laryngeal nerve palsy 
Explanation: Recurrent Laryngeal Nerve paralysis:If both recurrent laryngeal nerves are interrupted, the vocal cords lie in a cadaveric position in between abduction and adduction and phonation is completely lost.When only one recurrent laryngeal nerve is affected, the opposite vocal cord compensates for it and phonation is possible but there is hoarseness of voiceSuperior Laryngeal Nerve paralysisIt divides into external and internal laryngeal nerves. External laryngeal nerve supplies cricothyroid and inferior constrictor and internal laryngeal nerve supplies mucous membrane of the larynx upto the level of vocal folds:Asymmetric vocal cord tensionProduces diplophoniaLoss of vocal fold tension (lowers pitch of voice)Inaccurate vocal cord appositionParalysed side slightly shoened and bowedMay be depressed below level of normal sideRotation of AP axis of vocal cordsPosterior commissure points to side of paralysisLoss of laryngeal sensation and increased risk of aspiration