Search results
Results from the WOW.Com Content Network
There is not an isolated neurotransmitter that alone is responsible for the sensation of wakefulness. However, it is known that many transmitters are used together to cause this effect. [5] [6] Research to map the wakefulness circuitry is ongoing. [6] Beta power has been used as an indicator of cortical arousal or alertness by several studies.
Wakefulness is a daily recurring brain state and state of consciousness in which an individual is conscious and engages in coherent cognitive and behavioral responses to the external world. Being awake is the opposite of being asleep, in which most external inputs to the brain are excluded from neural processing. [1] [2] [3] [4]
This system of a sort of general activation of consciousness is called "arousal" or "wakefulness". [14] It is not necessarily accompanied by drowsiness. [16] Patients may be awake (not sleepy) yet still have a clouded consciousness (disorder of wakefulness). [17] Paradoxically, affected individuals say that they are "awake but, in another way ...
Consciousness is the quality or state of being aware of an external object or something within oneself. It has been defined as: subjectivity , awareness , sentience , the ability to experience or to feel , wakefulness, having a sense of selfhood , and the executive control system of the mind.
Daydreaming is a stream of consciousness that detaches from current external tasks when one's attention becomes focused on a more personal and internal direction. Various names of this phenomenon exist, including mind-wandering , fantasies, and spontaneous thoughts.
These images were taken during rested wakefulness and again after one night of sleep deprivation. The thalamus is more highly activated when accompanied by sleep deprivation—than when the subject is in a state of rested wakefulness. Contrarily, the thalamus is more highly activated during difficult tasks accompanied by rested wakefulness, but ...
Modern dictionary definitions of the word consciousness evolved over several centuries and reflect a range of seemingly related meanings, with some differences that have been controversial, such as the distinction between inward awareness and perception of the physical world, or the distinction between conscious and unconscious, or the notion ...
Secondary consciousness is an advanced state that includes both primary consciousness and abstract analysis, or thinking, and metacognitive components, or the awareness of being aware. [1] Most animals show some stages of primary consciousness, but only humans have been experimentally shown to experience secondary consciousness.