<unk>  is defined as cessation of breathing by a premature infant that lasts for more than 20 seconds and/or is accompanied by hypoxia or bradycardia.<unk>  is traditionally classified as either obstructive, central, or mixed. Obstructive<unk>  may occur when the infant's neck is hyperflexed or conversely, hyperextended. It may also occur due to low pharyngeal muscle tone or to inflammation of the soft tissues, which can block the flow of air though the pharynx and vocal cords. Central<unk>  occurs when there is a lack of respiratory effort. This may result from central nervous system immaturity, or from the effects of medications or illness. Many episodes of<unk>  may start as either obstructive or central, but then involve elements of both, becoming mixed in nature.
Apnea of prematurity
Infant respiratory distress syndrome
Infantile apnea
Transient tachypnea of the newborn
Neonatal meningitis
Ichthyosis prematurity syndrome
Shaken baby syndrome
Neonatal sepsis