Which assessment technique allows for the best observation of vocal fold function during swallowing?

The choice of fiberoptic endoscopic evaluation of swallowing (FEES) as the best technique for observing vocal fold function during swallowing is based on its unique advantages. FEES allows for direct visual assessment of the individual’s swallowing mechanics, including real-time observation of the laryngeal structures and vocal fold movement.

During a FEES procedure, a flexible endoscope is inserted through the nose and down to the pharynx, enabling clinicians to visualize the vocal folds during the act of swallowing. This method provides critical information about how the vocal folds function in relation to swallowing, including any potential aspiration risks, as well as the effectiveness of compensatory strategies or interventions.

In contrast, while other techniques like videostroboscopy focus on vocal fold vibration during phonation, and videofluoroscopic swallowing study (VFSS) evaluates the swallowing process using fluoroscopy, they do not allow for the same level of detailed observation of vocal fold movement in conjunction with swallowing. VFSS, specifically, evaluates the swallow in a dynamic imaging format but doesn't provide direct visualization of the vocal folds themselves. Magnetic resonance imaging, although providing valuable anatomical information, is not typically used in a clinical setting for observing vocal fold dynamics during swallowing due to its lack of real-time