In bilateral recurrent Laryngeal nerve palsy which of the following is seen?
**Core Concept**
Bilateral recurrent laryngeal nerve palsy involves the nerves supplying the intrinsic muscles of the larynx, except for the cricothyroid. This condition can lead to significant respiratory and voice alterations due to the paralysis of these muscles.
**Why the Correct Answer is Right**
Since the correct answer is not provided, let's discuss the general approach to this question. In bilateral recurrent laryngeal nerve palsy, both nerves that control the posterior cricoarytenoid muscles (the only abductors of the vocal folds) are affected. This typically results in the vocal folds being unable to abduct, potentially leading to airway obstruction.
**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific details of option A, we cannot directly address why it is incorrect. However, in general, options that do not relate to the paralysis of the intrinsic laryngeal muscles or the resulting respiratory and vocal cord issues would be incorrect.
**Option B:** Similarly, without specifics, any option that does not accurately describe the consequences of bilateral recurrent laryngeal nerve palsy on vocal cord movement or airway patency would be incorrect.
**Option C:** This would be incorrect if it suggests a condition or symptom not directly related to the paralysis of the intrinsic laryngeal muscles.
**Option D:** Any option that misrepresents the clinical presentation or anatomical consequences of this condition would be incorrect.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that bilateral recurrent laryngeal nerve palsy can lead to significant airway compromise due to the inability of the vocal folds to abduct, whereas unilateral palsy typically presents with hoarseness due to the affected vocal fold's inability to move towards the midline.
**Correct Answer:** Correct Answer: D. Stridor and respiratory distress due to bilateral vocal fold paralysis.