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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.
Arousal is the physiological and psychological state of being awoken or of sense organs stimulated to a point of perception. It involves activation of the ascending reticular activating system (ARAS) in the brain, which mediates wakefulness, the autonomic nervous system, and the endocrine system, leading to increased heart rate and blood pressure and a condition of sensory alertness, desire ...
Wakefulness is a quantitative assessment of the degree of consciousness, whereas awareness is a qualitative assessment of the functions mediated by the cortex, including cognitive abilities such as attention, sensory perception, explicit memory, language, the execution of tasks, temporal and spatial orientation and reality judgment.
Representation of consciousness from the 17th century by Robert Fludd, an English Paracelsian physician. Consciousness, at its simplest, is awareness of internal and external existence. [1] However, its nature has led to millennia of analyses, explanations, and debate by philosophers, scientists, and theologians.
Dreams can be weird: sex dreams, stress dreams, dreams about your ex who you thought you were totally over. But have you ever had a dream so frustrating, upsetting, or bizarre that you wished you ...
Consciousness is an ambiguous term. It can be used to mean self consciousness, awareness, the state of being awake, and so on. Chalmers uses Thomas Nagel's definition of consciousness: "the feeling of what it is like to be something." Consciousness, in this sense, is synonymous with experience. [31] [27]