David added subsection_Monitoring_oscillating_food_levels__.tex  about 8 years ago

Commit id: 3270fbcacbbceba45693e6388f25d26eee6bcfbd

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\subsection{Monitoring oscillating food levels}  High and low food levels were measured prior to the assay. Food coloring (manufacturer, concentration ????)was added to the tube containing low food concentration. In preliminary assays we observed that oscillating between two sources containing identical concentrations of food, one of which supplemented with food coloring, did not evoke a correlated response (data not shown). Thus, our assay could not detect a response to neither the food coloring nor the switching between the two sources. The food coloring shifted the mean brightness of our images, which indicated the concentration of food flowing through the device, without obscuring the anatomy of the pharynx.