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Closed-eye hallucinations and closed-eye visualizations (CEV) are hallucinations that occur when one's eyes are closed or when one is in a darkened room. They should not be confused with phosphenes, perceived light and shapes when pressure is applied to the eye's retina, or some other non-visual external cause stimulates the eye.
[8] [9] Visual hallucinations generally appear when the eyes are open, fading once the visual gaze shifts. [1] It is widely claimed that sensory deprivation is instrumental in the progression of CBS. [10] During episodes of inactivity, hallucinations are more likely to occur. [1]
Half of patients experience more than one kind of delusion. [2] Delusions occur without hallucinations in about one-half to two-thirds of patients with psychotic depression. [2] Hallucinations can be auditory, visual, olfactory (smell), or tactile (touch), and are congruent with delusional material. [2] Affect is sad, not flat.
Visual hallucinations may be simple/non-formed visual hallucinations, or complex/formed visual hallucinations. [15] Simple visual hallucinations without structure are known as phosphenes and those with geometric structure are known as photopsias. [16] These hallucinations are caused by irritation to the primary visual cortex (Brodmann's area 17 ...
Peduncular hallucinosis is more common in patients with a long duration of Parkinson's disease and also with a long treatment history, depression, and cognitive impairment. [4] Paranoid delusions are common in these patients even though the hallucinations can occur during clear sensorium .
Typical symptoms of the disorder include halos or auras surrounding objects, trails following objects in motion, difficulty distinguishing between colors, apparent shifts in the hue of a given item, the illusion of movement in a static setting, visual snow, distortions in the dimensions of a perceived object, intensified hypnagogic and hypnopompic hallucinations, monocular double vision ...
Palinopsia (Greek: palin for "again" and opsia for "seeing") is the persistent recurrence of a visual image after the stimulus has been removed. [1] Palinopsia is not a diagnosis; it is a diverse group of pathological visual symptoms with a wide variety of causes. Visual perseveration is synonymous with palinopsia.
Decreased concentration may be reported by the patient or observed by others. [1] Changes in motor activity by individuals in a major depressive episode that is slower or faster than normal levels may be noticed by those around them. [9] People with depression may be overly active (psychomotor agitation) or very lethargic (psychomotor ...
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