Abstract
An arousal is considered a discrete event occurring within the context of sleep. The spectrum of arousal ranges from autonomic activation to complete awakening. Arousal is a graded phenomenon that may be associated with any combination of abrupt electroencephalogram (EEG) alterations (frequency and amplitude), blood pressure elevation, sympathetic activation, tachypnea, tachycardia, and movement. Though arousals may alleviate gas exchange abnormalities and normalize respiratory effort, they may do so with the untoward sequelae of sleep fragmentation. Thus, arousal must be viewed as both an essential protective mechanism and as an epiphenomenon adversely affecting sleep quality. This chapter will focus primarily on the role of arousal as a protective reflex, restoring airway patency in response to increased upper airway resistance.
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Katz, E.S. (2012). Arousal: Ontology, Functional Anatomy, Methodology, and Consequences. In: Kheirandish-Gozal, L., Gozal, D. (eds) Sleep Disordered Breathing in Children. Respiratory Medicine. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-60761-725-9_8
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