Following six nights of monitored sleep lasting eight hours per night, the study participants were given a performance test that involved adding randomly generated, two-digit numbers, said Wright. Based on the results, the researchers concluded the subjects exhibited the most severe impairments from sleep inertia within the first three minutes after awakening, he said.
The most severe effects of sleep inertia generally dissipated within the first 10 minutes, although its effects are often detectable for up to two hours, according to the study authors.
Studies conducted by Dr. Thomas Balkin and colleagues at the Walter Reed Army Institute of Research in Washington, D.C., have shown cortical areas of the brain like the prefrontal cortex take longer to come “on-line” following sleep than other areas of the brain, Wright said. The prefrontal cortex is thought to be responsible for problem solving, emotion and complex thought.
Anyone here make their best decisions 1 minute after waking up?