Figure 8 - Barium swallow study after cranial nerve injury (IX, X, and XII) with asymmetric hyoid elevation.
From the following article
Head and neck disorders affecting swallowing
Timothy M. McCulloch and Debra Jaffe
GI Motility online (2006)
doi:10.1038/gimo36
a: Pre-swallow. b: Bolus delivery to hypopharynx. c: Laryngopharyngeal elevation (white arrow). d: Post-swallow with residual barium in piriform sinus (black arrow).
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