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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 ...
Hypnopompia (also known as hypnopompic state) is the state of consciousness leading out of sleep, a term coined by the psychical researcher Frederic Myers.Its mirror is the hypnagogic state at sleep onset; though often conflated, the two states are not identical and have a different phenomenological character.
Sleep paralysis may include hallucinations, such as an intruding presence or dark figure in the room. These are commonly known as sleep paralysis demons. It may also include suffocating or the individual feeling a sense of terror, accompanied by a feeling of pressure on one's chest and difficulty breathing. [9]
According to a study on sleep disturbances in the Journal of Neural Transmission, a hypnic jerk occurs during the non-rapid eye movement sleep cycle and is an "abrupt muscle action flexing movement, generalized or partial and asymmetric, which may cause arousal, with an illusion of falling". [13]
Hypnagogic foot tremor and alternating leg muscle activation during sleep 781.01 R25.8 Propriospinal myoclonus at sleep onset 781.01 R25.8 Excessive fragmentary myoclonus: 781.01 R25.8 Other Sleep Disorders: Other physiological (organic) sleep disorder 327.8 G47.8 Other sleep disorder not due to a known substance or physiological condition 327. ...
Sleep-related hallucinations are brief episodes of dream-like imagery that can be of any sensory modality, i.e., auditory, visual, or tactile. [2] They are differentiated between hypnagogic hallucination, that occur at sleep onset, and hypnapompic hallucinations, which occur at the transition of sleep to awakening. [2]
Individuals with exploding head syndrome hear or experience loud imagined noises as they are falling asleep or are waking up, have a strong, often frightened emotional reaction to the sound, and do not report significant pain; around 10% of people also experience visual disturbances like perceiving visual static, lightning, or flashes of light.
Sleep-related hallucination may refer to: Hypnagogic hallucination – hallucinations while falling asleep; Dreaming – conscious experiences during sleep; Hypnopompic hallucination – hallucinations while waking up