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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 ...
Nightmare disorder is a sleep disorder characterized by repeated intense nightmares that most often center on threats to physical safety and security. [2] The nightmares usually occur during the REM stage of sleep, and the person who experiences the nightmares typically remembers them well upon waking. [2]
Le Cauchemar (The Nightmare), by Eugène Thivier (1894) Although the core features of sleep paralysis (e.g., atonia, a clear sensorium, and frequent hallucinations) appear to be universal, the ways in which they are experienced vary according to time, place, and culture. [9] [33] Over 100 terms have been identified for these experiences. [18]
Nightmares and “daymares,” dreamlike hallucinations that appear when awake, may be little-known signs of the onset of lupus and other systemic autoimmune diseases such as rheumatoid arthritis ...
Recent research from the United Kingdom suggests that the onset of graphic nightmares and ... They described it as not necessarily scary but similar to having a dream while being awake, such as ...
Indeed, the only thing that distinguishes nightmares from other types of dreams is that they’re downright unpleasant for the dreamer. The good news, though, is that nightmares might serve a purpose.
In addition, nightmares appear ordinarily during REM sleep in contrast to night terrors, which occur in NREM sleep. [2] Finally, individuals with nightmares can wake up completely and easily and have clear and detailed memories of their dreams. [2] [30] A distinction between night terrors and epileptic seizure is required. [30]
Risk factors for sleep anxiety. Experiencing post-traumatic stress disorder (PTSD) and having nightmares also may make you more vulnerable to somniphobia. Some estimates say that up to 96 percent ...