Source:http://linkedlifedata.com/resource/umls/id/C0003808
MSH: Cortical vigilance or readiness of tone, presumed to be in response to sensory stimulation via the reticular activating system.,CSP: cortical vigilance or readiness of tone, presumed to be in response to sensory stimulation via the reticular activating system.,NCI: The state of being alert and ready to respond, or waking from sleep.