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A hypnic jerk, hypnagogic jerk, sleep start, sleep twitch, myoclonic jerk, or night start is a brief and sudden involuntary contraction of the muscles of the body which occurs when a person is beginning to fall asleep, often causing the person to jump and awaken suddenly for a moment.
Exploding head syndrome (EHS) is an abnormal sensory perception during sleep in which a person experiences auditory hallucinations that are loud and of short duration when falling asleep or waking up. [2] [4] The noise may be frightening, typically occurs only occasionally, and is not a serious health concern. [2]
In these cases, visual snow is a normal reaction of the body, related to the way photoreceptors (rods) and neurons respond to weak or insufficient stimuli. [ citation needed ] However, if visual snow becomes persistent and continuous — especially if it is accompanied by other symptoms, such as headaches, difficulty focusing, or intense visual ...
A migraine attack can be a debilitating condition. But a headache is just one part. There are other subtle warning symptoms to watch out for, neurologists say.
Hypnagogic hallucinations are often auditory or have an auditory component. Like the visuals, hypnagogic sounds vary in intensity from faint impressions to loud noises, like knocking and crashes and bangs (exploding head syndrome). People may imagine their own name called, crumpling bags, white noise, or a doorbell ringing.
If you’ve recently had a head trauma, such as being rear-ended in a car accident (even a minor one), hitting your head during sports participation, or a fall, you may have a concussion, says Dr ...
Cephalic aura, a perception of movement of the head or inside the head [24] Abdominal aura, such as an epigastric rising sensation [25] Nausea [26] Numbness or tingling (paresthesia) [27] Weakness on one side of the body (hemiparesis) [28] Feelings of being separated from or floating above one's body (dissociation) [29]
From cold and flu to stress to post-workout muscle soreness, there are a bevy of things that can cause your body aches. Here's how to spot each one—and what you can do to make the pain go away.