Fig. 12. Quantitative inputs and results of the odontophore-centric model of a seaweed noodle swallow, magnetic resonance imaging (MRI) sequence 7725-S2, frames 44-66. Each frame is 310ms (real time). (A) Radular stalk angle, measured from each MRI frame. These values were direct inputs into the model. (B) Shape space analysis of MRI frames 44-66. (C) Shape space analysis of the corresponding odontophore-centric model frames. Peak protraction and peak retraction are in good agreement with B, but frames near rest do not match. The gray symbols marking key events of the feeding cycle in A and B are defined in Fig. 3C. (D) Model I2 and I7 muscle lengths. I7 doubles and I2 more than doubles its length during t1. Intervals t1, t2, t3 and t4 are defined in Materials and methods. (E) Model I1/I3 muscle antero-posterior length. (F) Model I1/I3 muscle ring widths (medio-lateral). Ring 1 (posteriormost) is at the lateral groove, and ring 6 (anteriormost) is at the opening of the jaws. There are some sharp changes in width (rings 3-6 during mid-t4 and the end of t1).

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