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Its mirror is the hypnagogic state at sleep onset; though often conflated, the two states are not identical and have a different phenomenological character. Hypnopompic and hypnagogic hallucinations are frequently accompanied by sleep paralysis , which is a state wherein one is consciously aware of one's surroundings but unable to move or speak.
Hori et al. regard sleep onset hypnagogia as a state distinct from both wakefulness and sleep with unique electrophysiological, behavioral and subjective characteristics, [10] [12] while Germaine et al. have demonstrated a resemblance between the EEG power spectra of spontaneously occurring hypnagogic images, on the one hand, and those of both ...
In obtundation, a person has a decreased interest in their surroundings, slowed responses, and sleepiness. [9] Stuporous: Sleep-like state (not unconscious); little/no spontaneous activity People with an even lower level of consciousness, stupor, only respond by grimacing or drawing away from painful stimuli. [8] Comatose
These impacts range in severity and it is important to be aware of the increased risk of health issues that may arise due to the stress-sleep cycle. Many of the physical impacts of stress overlap with the physical impacts of sleep deprivation, including short-term impacts like fatigue and headaches, and long-term impacts like high blood ...
the totality in psychology of sensations, perceptions, ideas, attitudes, and feelings of which an individual or a group is aware at any given time or within a particular time span—compare STREAM OF CONSCIOUSNESS; waking life (as that to which one returns after sleep, trance, fever) wherein all one's mental powers have returned . . .
Subsequently, it was hardly used in the known literature up to the middle of the 17th century. The term is found again in Thomas Willis ' (1621–1675) influential De anima brutorum (1672), where lethargy (pathological sleep), 'coma' (heavy sleeping), carus (deprivation of the senses) and apoplexy (into which carus could turn and which he ...
Stupor is characterized by impaired reaction to external stimuli. Those in a stuporous state are rigid, mute and only appear to be conscious, as the eyes are open and follow surrounding objects.
A first summary of the existing literature was carried out by Charles T. Tart in his book Altered the States of Consciousness, which led to a more common use of the term. [23] Tart coined the key terms discrete [ note 2 ] and baseline states of consciousness and thought about a general classification system for ASCs. [ 24 ]