<unk>  can be involuntary—for example, drug-induced (such as by opiate toxicity), mechanically induced (for example, by strangulation or choking), or a consequence of neurological disease or trauma. During<unk>  in patients who are suffering from<unk><unk> , these events can occur up to more than a hundred times per hour every night.<unk>  can also be observed during periods of heightened emotion, such as during crying or accompanied by the Valsalva maneuver when a person laughs.<unk>  is a common feature of sobbing while crying, characterised by slow but deep and erratic breathing followed by brief periods of breath holding. Another example of<unk>  are breath-holding spells; these are sometimes emotional in cause and are observed in children as a result of frustration, emotional stress and other psychological extremes. Voluntary<unk>  can be achieved by closing the vocal cords, simultaneously keeping the mouth closed and blocking the nasal vestibule, or constantly activating expiratory muscles.
symptom of Sleep apnea
symptom of Dysautonomia
symptom of Mouth breathing
symptom of Gastroesophageal reflux disease
symptom of Pulmonary heart disease
symptom of Acne
symptom of Croup
symptom of Hypoxia 