Oralfasen

Oralfasen refers to the initial stage of the swallowing process, specifically the voluntary phase where food or liquid is prepared for propulsion down the throat. This phase begins when food is taken into the mouth and ends when the bolus, a cohesive mass of food or liquid, is pushed to the back of the mouth, triggering the involuntary pharyngeal swallow. During the oral phase, the tongue manipulates the food or liquid, mixing it with saliva to form a bolus. This is aided by the teeth, which may be used for chewing or breaking down larger pieces. The lips seal to contain the bolus within the oral cavity. The tongue then retracts and moves posteriorly, propelling the bolus towards the pharynx. The duration of the oral phase can vary depending on the consistency and size of the bolus. This voluntary phase is crucial for efficient and safe swallowing, as it allows for inspection and preparation of the material before it enters the airway. Any impairment in the oral phase can lead to difficulties in chewing, bolus formation, or premature spillage of food or liquid into the pharynx, increasing the risk of aspiration.