Anton–Babinski syndrome, case report

Juan, A. Martín; Madrigal, R.; Etessam, Jesús Porta; Baldomero, Federico Sáenz-Francés San; Bueso, Enrique Santos

doi:10.1016/j.oftale.2018.06.006

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…We identified 24 cases of visual deficits without awareness 2,21–41 (visual anosognosia, see Fig 1, Tables S1, S2), 69 cases of visual deficits with awareness, 11 95 cases of motor deficits without awareness (motor anosognosia), and 79 cases of motor deficits with awareness 1 from several sources. The network of voxels connected to each lesion location was computed and the resulting 267 lesion networks were entered into a single voxelwise ANOVA (see Fig 2).…”

Section: Resultsmentioning

confidence: 99%

Network Localization of Awareness in Visual and Motor Anosognosia

Kletenik,

Gaudet,

Prasad

et al. 2023

Annals of Neurology

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ObjectiveUnawareness of a deficit, anosognosia, can occur for visual or motor deficits and lends insight into awareness itself; however, lesions associated with anosognosia occur in many different brain locations.MethodsWe analyzed 267 lesion locations associated with either vision loss (with and without awareness) or weakness (with and without awareness). The network of brain regions connected to each lesion location was computed using resting‐state functional connectivity from 1,000 healthy subjects. Both domain specific and cross‐modal associations with awareness were identified.ResultsThe domain‐specific network for visual anosognosia demonstrated connectivity to visual association cortex and posterior cingulate while motor anosognosia was defined by insula, supplementary motor area, and anterior cingulate connectivity. A cross‐modal anosognosia network was defined by connectivity to the hippocampus and precuneus (false discovery rate p < 0.05).InterpretationOur results identify distinct network connections associated with visual and motor anosognosia and a shared, cross‐modal network for awareness of deficits centered on memory‐related brain structures. ANN NEUROL 2023

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Section: Resultsmentioning

confidence: 99%

Network Localization of Awareness in Visual and Motor Anosognosia

Kletenik,

Gaudet,

Prasad

et al. 2023

Annals of Neurology

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“…The fundoscopy was normal. The patient had visual anosognosia and confabulation in the setting of obvious visual loss and cortical blindness defined as Anton-Babinski syndrome, also known as ABS or Anton syndrome [2,3]. A native CT scan revealed a hypodense cerebral lesion in the left medial occipital cortex and subcortex (lingual gyri and cuneus) and a hyperdense cerebral lesion located in the right medial occipital cortex and subcortex (lingual gyri and cuneus).…”

Section: Case Descriptionmentioning

confidence: 99%

Cortical Blindness Due to Bilateral Strokes – A Case Report of Anton Syndrome

Mladenovski¹,

Mladenovski²,

Stoev³

et al. 2023

JofIMAB

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Background: Blindness (anopia) is a functional loss of vision, which could be due either to ophthalmological or neurological conditions. Blindness may be congenital or acquired. The main causes of blindness in adults are cataracts, uncorrected ametropia (myopia, astigmatism), glaucoma, macular dystrophy, cortical ischemic strokes, etc. In less than 10% of the patients, the reason for cortical blindness is bilateral occipital strokes, one of them hemorrhagic. Case Description: In the current case report, we present a 75-year-old patient with complaints of headache and visual loss. The patient has a history of a left PCA (posterior cerebral artery) distal ischemic stroke. The CT scan reveals a hypodense cerebral lesion in the left medial occipital cortex and subcortex (lingual gyri and cuneus) and a hyperdense cerebral lesion in the right medial occipital cortex and subcortex (lingual gyri and cuneus). The neurological examination shows only bilateral visual loss without motor deficits. The patient has visual anosognosia and confabulation in the setting of obvious visual loss and cortical blindness(Anton-Babinski syndrome, also known as ABS or Anton syndrome). However, performing cerebellar tests (dysdiadochokinesis, finger-to-nose test, heel-to-shin test, cerebellar ataxia) was not done because of the visual loss. After being consulted by a neurologist and neurosurgeon with the preliminary diagnosis of brain hemorrhage, the patient was admitted to the Neurology Clinic of UMHAT D-r "Georgi Stranski", Pleven, Bulgaria. Conclusion: Occipital infarction must be considered in all cases with sudden onset of isolated visual loss. Early diagnosis and treatment of stroke reduce mortality and morbidity. The prognosis depends on the extension of the visual cortex damage.

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Introspection and Belief: Failures of Introspective Belief Formation

Caporuscio

2021

Rev.Phil.Psych.

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Introspection has traditionally been defined as a privileged way of obtaining beliefs about one’s occurrent mental states, and the idea that it is psychologically and epistemically different from non-introspective belief formation processes has been widely defended. At the same time, philosophers and cognitive scientists alike have pointed out the unreliability of introspective reports in consciousness research. In this paper, I will argue that this dissonance in the literature can be explained by differentiating between infallible and informative introspective beliefs. I will argue that the latter are formed similarly to beliefs about the external world, and are therefore susceptible to similar success and failure conditions. Understanding introspection as belief-like will help to locate possible sources of error in regular as well as in pathological cases, carrying relevant implications for the relationship between experience, belief, and delusion.

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Anton–Babinski syndrome, case report

Cited by 5 publications

References 4 publications

Network Localization of Awareness in Visual and Motor Anosognosia

Network Localization of Awareness in Visual and Motor Anosognosia

Cortical Blindness Due to Bilateral Strokes – A Case Report of Anton Syndrome

Introspection and Belief: Failures of Introspective Belief Formation

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