yskimärefleksi

The yskimärefleksi, often referred to as the gag reflex or pharyngeal reflex, is an involuntary reflex present in mammals. It is a protective mechanism designed to prevent foreign objects from entering the airway and causing suffocation. The reflex is triggered by stimulation of the pharyngeal wall or the back of the tongue.

When the gag reflex is initiated, a series of coordinated muscle contractions occur. These include rapid contractions of the pharyngeal muscles, elevation of the soft palate, and backward movement of the tongue. Simultaneously, the larynx closes, and breathing may be temporarily inhibited. These actions work together to expel the offending substance from the pharynx.

The yskimärefleksi is mediated by the glossopharyngeal nerve (cranial nerve IX) and the vagus nerve (cranial nerve X), which transmit sensory information from the pharynx to the brainstem. The motor response is then carried out by efferent pathways. While a vital protective reflex, excessive sensitivity or abnormal functioning of the gag reflex can lead to difficulties with eating, swallowing, or medical procedures such as dental examinations or endoscopies. In some cases, interventions may be necessary to manage an overactive gag reflex.