Palinopsia: a case report and review of the literature

Fournier, Annick; Zackon, David H.

doi:10.1016/s0008-4182(00)80011-3

Cited by 5 publications

(3 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Die 5 untersuchten Patienten mit Palinopsie beschrieben positive Nachbilder und Light Streaking. Mögliche Ursachen einer illusionären Palinopsie sind außer dem idiopathischen Auftreten beim Visual-Snow-Syndrom eine Migräne [25], die Einnahme von Halluzinogenen, verschiedener Medikamente wie Antidepressiva (Maprotilin, Nefazodon, Trazodon, Mirtazapin), Neuroleptika (Risperidon), aber auch von Clomifen [23,26], sowie Schädel-Hirn-Traumata [27]. Dieser Sachverhalt belegt die Wichtigkeit einer exakten Diagnose des Visual-Snow-Syndroms, insbesondere die Abgrenzung von einer Migräne und den Ausschluss einer halluzinogenbedingten Symptomatik.…”

Section: Palinopsieunclassified

Das Visual-Snow-Syndrom: Symptome und ophthalmologische Befunde

Tegetmeyer

2016

Klin Monatsbl Augenheilkd

View full text Add to dashboard Cite

The symptom "visual snow" describes the continuous perception of tiny flickering dots within the whole visual field of both eyes. The diagnosis of a visual snow syndrome requires the appearance of typical additional visual symptoms and the exclusion of ophthalmological or neurological causes, or pharmacological influences. Three male and four female subjects between 13 and 36 years of age referred with visual snow were investigated and asked about their symptoms. A complete ophthalmological investigation, including binocular fundoscopy, was performed in all patients. Furthermore, best corrected visual acuity, perimetry, binocular functions, colour vision (D15-test), full-field ERG, pattern-reversal VEP and SD-OCT images of macula and optic nerve (RNFL) were analysed. Visual acuity of at least 1.0 and normal findings for all further investigations were observed in all patients. The following additional visual symptoms were identified: illusionary palinopsia (n = 6), disturbance of night vision (n = 5), positive light phenomena (n = 7). A history of migraine with aura was reported in five patients. The intake of hallucinogenic drugs or centrally active pharmaceuticals was denied by all patients. The findings of available or initiated neurological investigations were normal. The visual snow syndrome has to be regarded as a diagnosis of exclusion. Visual function parameters are not impaired. Apart from eye diseases, a persistent migraine aura as well as neurological diseases or the intake of hallucinogenic drugs must be excluded as possible causes of visual snow and palinopsia.

show abstract

Section: Palinopsieunclassified

Das Visual-Snow-Syndrom: Symptome und ophthalmologische Befunde

Tegetmeyer

2016

Klin Monatsbl Augenheilkd

View full text Add to dashboard Cite

show abstract

“…The attributes of the subject's visual aura changed from scintillating scotomas to Moore' patterns. In 1966, palinopsia was attributed to migraine 8–12 . The laterality of the headaches was unpredictable, sometimes occurring many times on the right side followed by an unpredictable number on the left.…”

Section: Commentsmentioning

confidence: 99%

Migrainous Visual Auras: A Life History

Reinecke

Silberstein²

2006

Headache

View full text Add to dashboard Cite

We document, as an autobiographical case report, a 72-year history of migraine and its changing nature. Minor neurological events have waxed and waned, causing repeated searches for pathology, but instead reconfirming an intact central nervous system. In this case it appears that visual migraine auras do not reflect severity of pathology. Visual auras of migraine are cyclical in frequency and intensity and may have remissions as long as 15 years.

show abstract

“…In patients with visual field impairment the illusory stimulus may be perceived in the intact hemifield (in which case it overlaps with, or adds to another stimulus), or within the scotoma [6,7]. Palinoptic images can be simple (dots, lines) or quite complex, such as a letter, a car registration number, a beard, or a dog walking by [8][9][10]. Some authors have retained abnormal aftereffects as plausible explanation of palinoptic phenomena [11].…”

Section: Introductionmentioning

confidence: 99%

When Left Is One and Right Is Double: An Experimental Investigation of Visual Allesthesia after Right Parietal Damage

Baumeler

Born

Burra

et al. 2020

Vision

View full text Add to dashboard Cite

Illusory visual phenomena, such as palinopsia, polyopsia or allesthesia, are rare manifestations of posterior cortical damage. Symptoms are characterized by illusory perceptions, ranging from isolated stationary objects to scenes and moving persons. Such illusions may appear while the original object is still in view, or become manifest with a delay and last for minutes, hours or even days. Some authors have suggested a disinhibited cortical response underlying visual illusions, but experimental studies supporting this hypothesis are lacking. Here, we examined a rare patient who after focal right parietal injury consistently reported a second stimulus on the left when briefly shown a target in his right hemifield. The patient perceived the illusory stimulus as less intense, and therefore concluded that it must have a different shape than the original stimulus. A masking experiment revealed that the frequency of the illusion was inversely related to the visibility of the original stimulus, suggesting that it depended on early, feedforward visual processing. We propose that illusory perceptions reflect the interplay of two physiological processes: a fast and automatic activation of contralateral, homotopic visual cortex after unilateral stimulation, and the lack of top-down inhibition following damage to the posterior parietal cortex.

show abstract

Palinopsia: a case report and review of the literature

Cited by 5 publications

References 22 publications

Das Visual-Snow-Syndrom: Symptome und ophthalmologische Befunde

Das Visual-Snow-Syndrom: Symptome und ophthalmologische Befunde

Migrainous Visual Auras: A Life History

When Left Is One and Right Is Double: An Experimental Investigation of Visual Allesthesia after Right Parietal Damage

Contact Info

Product

Resources

About