What does reticular activating system mean?
Definitions for reticular activating system
retic·u·lar ac·ti·vat·ing sys·tem
This dictionary definitions page includes all the possible meanings, example usage and translations of the word reticular activating system.
Princeton's WordNet
reticular activating system, RASnoun
the network in the reticular formation that serves an alerting or arousal function
Wikipedia
reticular activating system
The reticular formation is a set of interconnected nuclei that are located throughout the brainstem. It is not anatomically well defined, because it includes neurons located in different parts of the brain. The neurons of the reticular formation make up a complex set of networks in the core of the brainstem that extend from the upper part of the midbrain to the lower part of the medulla oblongata. The reticular formation includes ascending pathways to the cortex in the ascending reticular activating system (ARAS) and descending pathways to the spinal cord via the reticulospinal tracts.Neurons of the reticular formation, particularly those of the ascending reticular activating system, play a crucial role in maintaining behavioral arousal and consciousness. The overall functions of the reticular formation are modulatory and premotor, involving somatic motor control, cardiovascular control, pain modulation, sleep and consciousness, and habituation. The modulatory functions are primarily found in the rostral sector of the reticular formation and the premotor functions are localized in the neurons in more caudal regions. The reticular formation is divided into three columns: raphe nuclei (median), gigantocellular reticular nuclei (medial zone), and parvocellular reticular nuclei (lateral zone). The raphe nuclei are the place of synthesis of the neurotransmitter serotonin, which plays an important role in mood regulation. The gigantocellular nuclei are involved in motor coordination. The parvocellular nuclei regulate exhalation.The reticular formation is essential for governing some of the basic functions of higher organisms and is one of the phylogenetically oldest portions of the brain.
ChatGPT
reticular activating system
The reticular activating system (RAS) is a network of neurons located in the brainstem that plays a key role in regulating wakefulness and sleep-wake transitions. It acts as a gatekeeper for information passing to the higher brain centers, helping to regulate consciousness and attention. It also plays a crucial role in maintaining behavioral arousal and consciousness. Dysfunction in the reticular activating system can lead to sleep disorders, attention deficits, or even coma.
Freebase
Reticular activating system
The reticular activating system, or extrathalamic control modulatory system, is a set of connected nuclei in the brains of vertebrates that is responsible for regulating arousal and sleep-wake transitions. As its name implies, its most influential component is the reticular formation.
Matched Categories
Numerology
Chaldean Numerology
The numerical value of reticular activating system in Chaldean Numerology is: 4
Pythagorean Numerology
The numerical value of reticular activating system in Pythagorean Numerology is: 8
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"reticular activating system." Definitions.net. STANDS4 LLC, 2023. Web. 3 Dec. 2023. <https://www.definitions.net/definition/reticular+activating+system>.
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