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Reflex syncope can occur in otherwise healthy individuals, and has many possible causes, often trivial ones such as prolonged standing with the legs locked. [ citation needed ] The main danger of vasovagal syncope (or dizzy spells from vertigo) is the risk of injury by falling while unconscious.
Dependent on the cause. May include IV fluids, Ringer's Lactate, glucose replacement therapy, thrombolytics, or simply sitting down/resting. Lightheadedness is a common and typically unpleasant sensation of dizziness [ 1 ] or a feeling that one may faint .
Causes range from non-serious to potentially fatal. [1] There are three broad categories of causes: heart or blood vessel related; reflex, also known as neurally mediated; and orthostatic hypotension. [1] Issues with the heart and blood vessels are the cause in about 10% and typically the most serious while neurally mediated is the most common. [1]
This wave of activity, called a cortical spreading depression, follows a particular pattern across the brain and can create a few different patterns of light in your vision. For example, the Mayo ...
“These variants still have the potential to cause severe disease,” Russo says. Is there a booster shot against the XEC variant? The most recent COVID-19 vaccine should offer protection against ...
Light from a single point of a distant object and light from a single point of a near object being brought to a focus. The accommodation reflex (or accommodation-convergence reflex) is a reflex action of the eye, in response to focusing on a near object, then looking at a distant object (and vice versa), comprising coordinated changes in vergence, lens shape (accommodation) and pupil size.
The weight loss drug Zepbound, generically known as tirzepatide, is also now an approved medication to treat obstructive sleep apnea, per a Food and Drug Administration Dec. 20 press release.. The ...
Calcium causes the release of neurotransmitters stored in synaptic vesicles, which enter the synapse between two neurons known as the presynaptic and postsynaptic neurons; if the signal from the presynaptic neuron is excitatory, it will cause the release of an excitatory neurotransmitter, causing a similar response in the postsynaptic neuron. [4]