Posted on 05/01/2023 9:35:19 PM PDT by ConservativeMind
Researchers demonstrated spatial and temporal abnormalities of spontaneous fixational saccades and their correlates with positive and cognitive symptoms in schizophrenia, suggesting that fixational saccades are a promising and easily obtainable biomarker for cognitive and positive symptoms and for complementary diagnosis in schizophrenia.
Schizophrenia is a devastating heterogenous psychotic disorder characterized by debilitating positive symptoms, negative symptoms, and cognitive deficits. Positive symptoms include hallucinations, delusions, disorganized speech and bizarre behaviors. Negative symptoms constitute an absence of normal functioning.
Given the central importance of seeing to humans, visual fixation is a fundamental behavioral pattern that allows people to gather information and guide decision-making. During visual fixation, microsaccades and large saccades (macrosaccades) occur spontaneously and frequently. These fixational saccades are sensitive to the structural and functional alterations of the cortical-subcortical-cerebellar circuit, and are closely linked with cognitive processes. However, the performances of fixational saccades in patients with schizophrenia remain largely unexplored.
Researchers analyzed fixational saccades recorded from 140 drug-naïve patients with first-episode schizophrenia and 160 age-matched healthy subjects during ten separate six-second attempted fixations. They found that patients with schizophrenia exhibited significantly more vertical saccades and a greater vertical deviation of horizontal saccades. They also found that the fixational saccades, especially horizontal saccades, had longer durations, faster peak velocities, and larger amplitudes in patients than in controls.
Through careful measurements of the schizophrenia patient's cognitive capacities, researchers found that the longer duration of horizontal saccades was associated with lower cognitive performance, especially deficits in attention/vigilance and speed of processing, and that the greater vertical deviation of horizontal saccades was associated with more severe positive symptoms.
Based solely on the fixational eye movements recorded during a one-minute period, a simple machine-learning model classified patients and controls with an accuracy of 85%.
(Excerpt) Read more at medicalxpress.com ...
Or you can just ask if they are a registered Democrat.
You can’t prove it. I’m normal. Can’t you see that I’m normal?
I may need a ‘translation’ of those first few sentences.
Or, I could just drive back here when I have more patience, and read it, glossary in hand.
This idea reminds me of the tests for androids that were done in the movie “Blade Runner”.
” debilitating positive symptoms, negative symptoms, and cognitive deficits”
But, don’t those positive and negative symptoms cancel each other?
Or, is that not how it works?
Positive and negative symptoms in schizophrenia are perhaps different from what the names imply. Positive symptoms are those that are “added” compared to a normal person — such as hallucinations and extreme delusions. Negative symptoms are characteristics that exist in the normal person but are “subtracted” in schizophrenia, such as ability to feel pleasure (anhedonia).
Had to look up “saccade”
A saccade (/səˈkɑːd/ sə-KAHD, French for jerk) is a quick, simultaneous movement of both eyes between two or more phases of fixation in the same direction.[1] In contrast, in smooth pursuit movements, the eyes move smoothly instead of in jumps.
https://en.m.wikipedia.org/wiki/Saccade
So the article is talking about observing the eye movements of the patient.
"Let me tell you about my mother!"
Regards,
I hOp E TTTThE y dOn’T ThImmmnnnn,,,,,mmmmk I’m like
CrAzY
juSt cuz i DO thI sssssssssssssssssss
wiTh My eYeSSSSSSSSSSSSsSsSsSsSsSsSsSsSsS
anD stufFfF
A test for the tranny crowd. It would ex6 a lot.
Yeah, just ask them if they know what a tortoise is.
I get that way when I look at boobies for too long.
FTA:
“[Positive] symptoms include hallucinations, delusions, disorganized speech and bizarre behaviors.”
^
Schizophrenia can be induced among MARIJUANA users, and now that it’s nominally legal, even children and pets can be affected.
https://pubmed.ncbi.nlm.nih.gov/32839678/
So if I stare at a woman for over one minute, does that mean I’m schizophrenic or not?
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