Microsleep is a temporary fall sleep or drowsiness which may last for a fraction of a second or up to 30 seconds where an individual fails to respond and becomes unconscious. It occurs when an individual loses awareness and subsequently gains awareness after a brief lapse in consciousness, or when there are sudden shifts between states of wakefulness and sleep. In behavioral terms, It manifests as droopy eyes, slow eyelid-closure, and head nodding. In electrical terms, microsleeps are often classified as a shift in electroencephalography (EEG) during which 4–7 Hz (theta wave) activity replaces the waking 8–13 Hz (alpha wave) background rhythm.
It often occurs as a result of sleep deprivation or during monotonous tasks. Some experts define microsleep according to behavioral criteria (head nods, drooping eyelids, etc.), while others rely on EEG markers. Microsleeps become extremely dangerous when they occur in situations that demand constant alertness, such as driving a motor vehicle or working with heavy machinery. People who experience microsleeps often remain unaware of them, instead believing themselves to have been awake the whole time, or to have temporarily lost focus.
I often difficult to withstand from falling sleep when I lose interest in the topic of discussions. It sometimes happen in a meeting. Some of my friends noticed that. In a class room, one of my friends complaints why