reticular activating system

English Thesaurus

1. the network in the reticular formation that serves an alerting or arousal function (noun.body)

hypernym	:	neural net, neural network,
definition	:	any network of neurons or nuclei that function together to perform some function in the body (noun.body)

part meronym	:	reticular formation, rf,
definition	:	a complex neural network in the central core of the brainstem; monitors the state of the body and functions in such processes as arousal and sleep and attention and muscle tone (noun.body)