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Visual snow syndrome is defined as lacking any known cause and is specifically distinguished from HPPD in its nosology, yet further research may clarify the relationship. HPPD usually has a visual manifestation, but some hallucinogenic and psychiatric drugs affect the auditory sense and can produce tinnitus -like symptoms as a side effect, and ...
The cause of the syndrome is unclear. [3] The underlying mechanism is believed to involve excessive excitability of neurons in the right lingual gyrus and left anterior lobe of the cerebellum. Another hypothesis proposes that visual snow syndrome could be a type of thalamocortical dysrhythmia and may involve the thalamic reticular nucleus (TRN ...
Illusory palinopsia is often worse with high stimulus intensity and contrast ratio in a dark adapted state.Multiple types of illusory palinopsia often co-exist in a patient and occur with other diffuse, persistent illusory symptoms such as halos around objects, dysmetropsia (micropsia, macropsia, pelopsia, or teleopsia), Alice in Wonderland Syndrome, visual snow, and oscillopsia.
Illusory palinopsia, usually due to migraines, head trauma, prescription drugs, visual snow syndrome or hallucinogen persisting perception disorder (HPPD), describes afterimages that are affected by ambient light and motion and are unformed, indistinct, or low resolution.
The paradoxical reactions may consist of depression, with or without suicidal tendencies, phobias, aggressiveness, violent behavior and symptoms sometimes misdiagnosed as psychosis. [24] [25] However, psychosis is more commonly related to the benzodiazepine withdrawal syndrome. [26] F14.5 cocaine [27]
Hallucinations; Tremor; Respiratory depression; Epileptiform convulsions; Involuntary muscle contractions; Abnormal coordination; Syncope (fainting) Blurred vision; Dyspnoea (shortness of breath) Tinnitus (ringing in the ears) Migraine; Stevens–Johnson syndrome/toxic epidermal necrolysis (potentially fatal skin reactions) Motorial weakness ...
The behavior of an avalanche depends on the structure of the snowpack, but that's only one ingredient. An avalanche requires all the wrong conditions at the wrong time. The angle of the mountain ...
This is a list of investigational hallucinogens and entactogens, or hallucinogens and entactogens that are currently under formal development for clinical use but are not yet approved. [ 1 ] Chemical/generic names are listed first, with developmental code names, synonyms, and brand names in parentheses.