Food Transport and Bolus Formation during Complete Feeding Sequences on Foods of Different Initial Consistency

摘要: Food movements during complete feeding sequences on soft and hard foods (8 g of chicken spread, banana, cookie) were investigated in 10 normal subjects; 6 these subjects also ate 8 peanuts. Foods coated with barium sulfate. Lateral projection videofluorographic tapes analyzed, jaw hyoid established after digitization records for subjects. Sequences divided into phases, each involving different food management behaviors. After ingestion, the bite was moved to postcanines by a pull-back tongue movement (Stage I transport) processed times depending initial consistency. Stage II transport chewed through fauces oropharyngeal surface occurred intermittently motion cycles. This movement, squeeze-back, depended tongue–palate contact. The bolus accumulated distal fauces, below palate, but cycled upward forward surface, returning oral cavity. accumulating spread valleculae. total accumulation time differed consistency could be as long 8–10 sec foods. There no predictable contact at any sequence. A new model formation deglutition is proposed.