Evening-Type Military Veterans Report Worse Lifetime Posttraumatic Stress Symptoms and Greater Brainstem Activity across Wakefulness and REM SleepHasler BP, Insana SP, James JA, Germain A Individual preferences in sleep-wake timing, or morningness-eveningness, colloquially referred to as being an ?early bird? or a ?night owl,? can be associated with mental and physical health outcomes. Various studies have linked...