Related by context. Frequent words. (Click for all words.) 41 alertness 38 heightened 38 vigilance 36 habituation 36 brain derived neurotrophic 36 mental alertness 36 involuntary movements 36 noradrenaline 35 Ghrelin 35 dopamine receptors 35 Secondary endpoints include 35 dampening effect 34 wakefulness 34 de Maiziere 33 stress hormone cortisol 33 act pre emptively 33 resting metabolic 33 Aerobic exercise 33 chemical serotonin 33 Secondary endpoints included 33 psychomotor 32 Dopamine 32 accommodative stance 32 insulin secretion 32 hormone melatonin 32 arterial stiffness 32 neurotransmitter dopamine 32 tightening 32 heightened alert 31 arousal 31 anticipatory 31 vasodilation 31 oxygen uptake 31 taming inflation 31 orexin 31 synaptic plasticity 31 lowering 31 norepinephrine 31 Heightened 30 vigilant 30 sociability 30 sexual arousal 30 neuronal activity 30 physiological responses 30 sleepiness 30 heighten 30 excitability 30 lessening 30 eternal vigilance 30 chemical dopamine 30 purposefulness 30 heightening 30 Europeā 29 heightens 29 abstract reasoning 29 hike 29 alert 29 Red Flag Warning 29 drowsiness 29 adversely affects 29 exigent 29 signaling 29 misinterpreted 29 heightened sensitivity 29 prudential supervision 29 tempering 29 cognition 29 dopamine 29 homeostatic 29 stress hormones 29 dampening 29 modifying 29 interpreted 29 Sleep deprivation 29 serotonin 29 dilated pupils 29 cortisol levels 29 profuse sweating 29 hypoglycemia 28 modulating 28 stimulating 28 sky marshals 28 neurotransmission 28 stimulant medications 28 glucose metabolism 28 caffeine intake 28 watchfulness 28 Cortisol 28 overemphasised 28 spokeswoman Amy Kudwa 28 inversely proportional 28 glucose tolerance 28 attentiveness 28 remain vigilant 28 Health Commissioner Markos 28 impulsivity 28 satiety 28 regulating 28 gauged 28 hypo 28 Flood watches