Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Arousals, Awakenings, and Autonomic Nervous System Activation

Arousals, Awakenings, and Autonomic Nervous System Activation [Pg.71]

EEG arousals have been defined with visual markers. However, the discriminative ability of the human eye of an expert is limited. It has been shown that an event must be a minimum of 3 sec to be visually detected (5). A 2002 study showed that for such short segments, beta EEG bursts are recognized but alpha bursts are not (6). The number of short EEG arousals necessary to induce sleep deprivation is unknown at this time. [Pg.72]

Moruzzi (9) already clearly dissociated activation from arousal. Stimulation from the sensory terminals leads to monosynaptic and more often polysynaptic reflexes. These polysynaptic reflexes relay in subcortical structures. Depending on the intensity of stimulation, the degree of neuronal recruitment, and so forth, the number of brain structures involved will vary. Stimulation may affect the thalamus, basal forebrain, and a newly recognized loop called the cor-ticothalamocortical loop (10). [Pg.72]

However, activation of the central nervous system (CNS) does not equate with EEG arousals or awakenings. CNS activation implies that integrative neurons were activated and sent information to descending pathways, the nucleus tractus solitarius, and sympathetic controlling cells. An ANS modulation is always associated with an efferent response. CNS activation may lead to an arousal, an awakening, or an important ANS activity change, but activation may be limited to a polysynaptic reflex response with ANS change and no EEG arousal (6). [Pg.72]

Major Sleep Disorders, Arousals, and Consequent Sleep Deprivation [Pg.73]




SEARCH



And nervous system

Arousal

AutoNom

Autonomation

Autonomic

Autonomic activation

Autonomic nervous

Autonomic nervous system

Autonomic nervous system activity

Autonomic system

Autonomous

Autonomous nervous system

Autonomous systems

Awakening

© 2024 chempedia.info