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syncope ⓘ. Syncope, commonly known as fainting or passing out, is a loss of consciousness and muscle strength characterized by a fast onset, short duration, and spontaneous recovery. [1]
Chronostasis (from Greek χρόνος, chrónos, 'time' and στάσις, stásis, 'standing') is a type of temporal illusion in which the first impression following the introduction of a new event or task-demand to the brain can appear to be extended in time. [1]
Dizziness is a common medical complaint, affecting 20–30% of persons. [4] Dizziness is broken down into four main subtypes: vertigo (~25–50%), disequilibrium (less than ~15%), presyncope (less than ~15%), and nonspecific dizziness (~10%). [5] Vertigo is the sensation of spinning or having one's surroundings spin about them. Many people find ...
Once you’ve experienced a blackout, “you’re more likely to have another,” says Lembke, and “some people are prone to blackouts for reasons we don’t understand.”
Again, showing symptoms of sundowning doesn’t automatically mean that your loved one has dementia—but it is something to get checked out. “As soon as you suspect sundowning changes in your ...
Other causes of dizziness include presyncope, disequilibrium, and non-specific dizziness. [2] Benign paroxysmal positional vertigo is more likely in someone who gets repeated episodes of vertigo with movement and is otherwise normal between these episodes. [9] Benign vertigo episodes generally last less than one minute. [2]
The second heart sound (S2) is caused by the closure of the aortic and pulmonic valves, which causes vibration of the valve leaflets and the adjacent structures. The aortic valve closes slightly before the pulmonic, and this difference is accentuated during inspiration when S2 splits into two distinct components (physiological splitting).
Why might blackouts be necessary this winter? Britain has one of the most reliable power networks in the world and unless cables are cut by storms or other accidents outages are rare.
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