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Tonic immobility has also been observed in several species of lizards and snakes. [42] [43] The most common example of tonic immobility in the latter is the North American hog-nose snake, but it has also been observed in grass snakes. [42] Tonic immobility can be reliably induced in iguanas by a combination of inversion, restraint and moderate ...
In human sexuality, paralysis, also known as rape paralysis, [1] involuntary paralysis, [2] fright (or faint), [3] [4] or tonic immobility, [1] [3] [5] is a natural bodily survival reaction which can be automatically activated by the brain of a person who feels threatened by sexual violence. During this paralysis, one cannot move and cannot say ...
The term cataplexy originates from the Greek κατά (kata, meaning "down"), and πλῆξις (plēxis, meaning "strike") [4] and it was first used around 1880 in German physiology literature to describe the phenomenon of tonic immobility also known as "playing possum" (in reference to the opossum's behavior of feigning death when threatened ...
[8] [9] Fainting may have acted as a form of tonic immobility, [8] allowing primitive humans to play dead in a situation where blood was being spilled, perhaps helping them to avoid the attention of enemies. It has also been suggested that the drop in blood pressure associated with seeing blood — as with an individual seeing blood from their ...
Untreated late-stage Parkinson's disease may present similarly to stuporous catatonia with symptoms of immobility, rigidity, and difficulty speaking. Further complicating the diagnosis is the fact that many patients with Parkinson's disease will have major depressive disorder, which may be the underlying cause of catatonia.
A common cognitive disorder with symptoms that mimic Alzheimer's is often mistaken for the disease. Researchers are calling for criteria to diagnose the little-known condition.
How long do symptoms last? They peak at 24 to 48 hours but can last up to 72 hours, says Dr. Dibba. Norovirus tends to hit hard and then fade fairly quickly. Symptoms do ramp up in intensity, however.
Ictal limb immobility occurred in 25 percent The results of this study are valuable because few other data exist on the frequency, duration, and seizure characteristics associated with PP. However, the study is likely biased by the inclusion only of patients with medically intractable seizures who had undergone video-EEG monitoring, and the ...