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. Author manuscript; available in PMC: 2021 Apr 1.
Published in final edited form as: Dysphagia. 2019 Aug 24;35(2):389–398. doi: 10.1007/s00455-019-10052-7

Figure 2.

Figure 2

Maximal laryngeal constriction area normalized (MLCAn): area outlining any unobliterated space within the laryngeal vestibule during the frame of maximal constriction seen during the swallow, expressed as a percentage of the squared length of C2-C4 (%C2-C42). This is measured by outlining any unobliterated airspace or barium contrast within the boundaries of the epiglottic petiole superiorly and anteriorly, the vocal folds inferiorly, and the arytenoids and aryepiglottic folds posteriorly.