What is meant by "apnea" in medical terminology?

Apnea refers specifically to a temporary cessation of breathing, which is a crucial aspect in the context of respiratory health. This term is often used in clinical settings to describe situations where breathing stops for a period of time, which can occur during sleep (sleep apnea) or as a result of various medical conditions. Understanding apnea is important in diagnosing and managing respiratory disorders, as prolonged episodes of apnea can lead to significant health risks, including hypoxia (lack of oxygen) and other complications.

The other terms do not relate to breathing cessation. Abnormal rigidity in joints pertains to stiffness typically associated with conditions like arthritis. Absence of pathogens refers to the state of being free from infectious agents, which is relevant to infection control and immunity but does not involve the aspect of breathing. Lastly, an inability to coordinate movements relates to motor function issues, possibly associated with neurological disorders, but again does not connect to the respiratory system or the concept of apnea.