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In response to audio stimuli, the mind's way of interpreting sound can be translated through a regulatory process called the reticular activating system.Located in the brain stem, the reticular activating system continually listens, even throughout delta-wave sleep, to determine the importance of sounds in relation to waking the cortex or the rest of the body from sleep.
Some may also feel occasional sharp pains punctuating the ache. In patients with migraines, trochleitis may occur simultaneously with headache. Presentation is usually unilateral with palpable swelling over the affected area supranasal to the eye. The trochlear region is extremely tender to touch.
The "covert-rapid-eye-movement" hypothesis proposes that hidden elements of REM sleep emerge during the wakefulness-sleep transition stage. [33] Support for this comes from Bódicz et al., who notes a greater similarity between WST (wakefulness-sleep transition) EEG and REM sleep EEG than between the former and stage 2 sleep.
associative synesthesia: feeling a very strong and involuntary connection between the stimulus and the sense that it triggers; For example, in chromesthesia (sound to color), a projector may hear a trumpet, and see an orange triangle in space, while an associator might hear a trumpet, and think very strongly that it sounds "orange".
EOG is a technique for measuring the resting potential of the retina in the human eye. [32] Eye-video test: Measures eyes blinking and eye movements to detect microsleep events. [33] [34] Mouth yawning test: Counts number of yawns over a period of time. [35] Speech tests: Examines emotions and/or prosody in speech to predict microsleep episodes ...
Sleep problems are a core symptom of fibromyalgia. [12] These include difficulty falling or staying asleep, awakening while sleeping, and waking up feeling unrefreshed. [12] A meta-analysis compared quantitative and qualitative sleep metrics in people with fibromyalgia and healthy people.
Rheum from a cat's eyes. Rheum (/ r uː m /; from Greek: ῥεῦμα rheuma 'a flowing, rheum') is a thin mucus naturally discharged from the eyes, nose, or mouth, often during sleep (contrast with mucopurulent discharge). [1] [2] [3] Rheum dries and gathers as a crust in the corners of the eyes or the mouth, on the eyelids, or under the nose. [3]
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.