Correct Answer: AFailure of organized peristaltic behavior, or the simultaneous contraction all along the smooth muscle is the definition of diffuse esophageal spasm.
Dysphagia is difficulty in swallowing due to the failure of lower esophageal sphincter relaxation. Achalasia appears to be a disorder of the efferent vagal inhibitory neurons that normally inhibit the LES causing the LES to fail to relax during swallowing.
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Physiology MCQs
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