They have discovered that most people frequently and repeatedly enter into short microsleep
periods, which are clearly indicated by their brain waves but of which they themselves are totally unaware.
Polysomnographic monitoring electrodes, which indicate when a subject exhibits microsleep
(1- to 15-second episodes of Stage 1, or first-level sleep), were applied to all the subjects at the beginning of the study and remained on continuously for the entire study period.
And then there are recently recognized scientific elements like sleep apnea, microsleep
, circadian rhythms, and so forth.
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Strauss tells us fatigue first manifests itself by errors of omission (forgetting to do things), followed by errors of commission (doing things wrong, or doing the wrong things), followed by involuntary microsleeps
(sleep lapses lasting from a few seconds to a few minutes).
As the pressure for sleep increases, the brain will unpredictably try to insert snatches of sleep: lapses or microsleeps
The findings coincide with a new series of Department for Transport (Df T) radio advertisements alerting drivers to the dangers of microsleeps
This explanation would be consistent with the concept of microsleeps
, in which the brain stops processing information, even though the eyes may still be open.
The FAST program will accept all the above information (except medication effects) and produce plots of expected levels of cognitive performance, including a numerical assessment of the predicted effectiveness of the mishap member and propensity for lapses or microsleeps
at the time of the mishap.
We are unlikely to know we have slept unless it lasts at least two minutes, and microsleeps
of a few seconds are common -even among airline pilots while flying a plane.
Fatigue and microsleeps
while motoring are often the cause of serious accidents.