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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 1973 report cites a university study of fifty cases of people complaining about a "low throbbing background noise" that others were unable to hear. The sound, always peaking between 30 and 40 Hz (hertz), was found to only be heard during cool weather with a light breeze, and often early in the morning. These noises were often confined to a 10 ...
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.
People who are experiencing aortic dissection, meanwhile—a tear in one of the body’s major arteries—describe sudden, stabbing pain in the middle of the chest that radiates to their back.
body rocking, where the whole body is moved while on the hands and knees. head banging, where the head is forcibly moved in a back and forth direction. head rolling, where the head is moved laterally while in a supine position. Other less common muscle movements include: body rolling, where the whole body is moved laterally while in a supine ...
Woman suddenly starts hearing mystery whooshing noise in tune with her heartbeat. It was a symptom of pulsatile tinnitus and was related to a vein in her neck. Woman, 39, driven crazy by mystery ...
It was pretty horrific – I wasn’t able to sleep because of this noise drilling into my head the whole time.” He says he gave up on everything. “I used to be the life and soul of the party ...
The torsional deflection of a simple cylinder cannot radiate efficiently acoustic noise, but with particular boundary conditions the stator can radiate acoustic noise under torque ripple excitation. [8] Structure-borne noise can also be generated by torque ripple when rotor shaft line vibrations propagate to the frame [9] and shaft line.