The activities of the muscles were evaluated through SLI, which consists of the assessment of muscle functioning by analyzing the displacement of a defined point on a given muscle. This displacement is tracked over time with respect to a fixed frame of reference, thus providing velocity data (i.e. speed) for a certain point on the muscle during muscle contraction. The use of SLI allowed us to determine the activity of oral muscles on the different types of feeding and to compare their strength and activity.