“Seeing but not identifying”: pure alexia coincident with prosopagnosia in occipital arteriovenous malformation

Liu, Yu-Chi; Wang, An-Guor; Yen, May-Yung

doi:10.1007/s00417-010-1586-4

Cited by 17 publications

(10 citation statements)

References 8 publications

(12 reference statements)

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“…While a direct comparison is thus missing, one report shows that VWFA is involved in memorization of words and faces [Mei et al, ]. Moreover, there are case reports of prosopagnosic individuals with right fusiform lesions, which also show an impairment of their reading ability [Behrmann and Kimchi, ], as well as of individuals with left hemispheric lesions, which suffer from both, pure alexia and prosopagnosia [Liu et al, ]. Recently, functional imaging at higher resolution has shown that face‐sensitive sites on the fusiform gyrus are not arranged as one homogenously organized area but in several distributed cortical patches, which alternate with patches of different functional specialization [Weiner and Grill‐Spector, ].…”

Section: Discussionmentioning

confidence: 99%

Functional characterization and differential coactivation patterns of two cytoarchitectonic visual areas on the human posterior fusiform gyrus

Caspers

Zilles

Amunts

et al. 2013

Human Brain Mapping

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The ventral stream of the human extrastriate visual cortex shows a considerable functional heterogeneity from early visual processing (posterior) to higher, domain-specific processing (anterior). The fusiform gyrus hosts several of those “high-level” functional areas. We recently found a subdivision of the posterior fusiform gyrus on the microstructural level, that is, two distinct cytoarchitectonic areas, FG1 and FG2 (Caspers et al., Brain Structure & Function, 2013). To gain a first insight in the function of these two areas, here we studied their behavioral involvement and coactivation patterns by means of meta-analytic connectivity modeling based on the BrainMap database (www.brainmap.org), using probabilistic maps of these areas as seed regions. The coactivation patterns of the areas support the concept of a common involvement in a core network subserving different cognitive tasks, that is, object recognition, visual language perception, or visual attention. In addition, the analysis supports the previous cytoarchitectonic parcellation, indicating that FG1 appears as a transitional area between early and higher visual cortex and FG2 as a higher-order one. The latter area is furthermore lateralized, as it shows strong relations to the visual language processing system in the left hemisphere, while its right side is stronger associated with face selective regions. These findings indicate that functional lateralization of area FG2 relies on a different pattern of connectivity rather than side-specific cytoarchitectonic features.

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Section: Discussionmentioning

confidence: 99%

Functional characterization and differential coactivation patterns of two cytoarchitectonic visual areas on the human posterior fusiform gyrus

Caspers

Zilles

Amunts

et al. 2013

Human Brain Mapping

View full text Add to dashboard Cite

show abstract

“…Moreover, there were some overlaps of neural selectivity between faces and words in early perceptual processing [30]. Additionally, face recognition impairments were more severe following bilateral than unilateral lesions [31] and a left occipital arteriovenous malformation resulted in both pure alexia and prosopagnosia [32]. However, previous studies were designed to examine the sex differences of the N170 component for faces or words separately.…”

Section: Introductionmentioning

confidence: 92%

Sex differences of hemispheric lateralization for faces and Chinese characters in early perceptual processing

Cao

2016

Neuroscience Letters

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“…On the other hand, alexia with agraphia points specifically to the posterior parietal lobe. It would not be wrong to mention that in pure alexia, a disconnection is present between the visual cortex and angular gyrus, so that visual-verbal unity is harmed (32). Marsh and Hillis (33) evidenced in a dependable manner with test batteries that such a linguistic deficit is not engendered by right hemineglect.…”

Section: Language Disorders and Thalamusmentioning

confidence: 99%

Language Disorders due to Posterior System Strokes - An Ignored Dysfunction

Öztürk¹,

Ege²,

Ekmekçi³

2014

Arch Neuropsychiatr

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The anterior system is primarily responsible for the clinical picture in a patient that presents with clinical aphasia. However, recent reports have shown that injuries to posterior structures, the cerebellum in particular, may have a role in language processing. Herein, we will look first at the linguistic role of the cerebellum in light of the literature, then of the thalamus and some described clinical syndromes, and finally, specific syndromes resulting from occipital lobe lesions, all of which are supported by the posterior vascular system. The human brain is such a complex organization that in addition to the thalamus and occipital cortex, we can see the involvement of the cerebellum in high cognitive functions. Posterior system strokes may lead to clinical findings of cognitive deficits, including neurolinguistic components. Determining these defects in stroke patients may precipitate changes in current management strategies.

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“Seeing but not identifying”: pure alexia coincident with prosopagnosia in occipital arteriovenous malformation

Abstract: Ophthalmologists should keep in mind that usual complaints of "blurred vision" might correlate with unusual visual recognition disorders. Pure alexia and prosopagnosia have not been reported to occur together and the left-handed- dominance in our case leads to this scarce concurrence.

Cited by 17 publications

References 8 publications

Functional characterization and differential coactivation patterns of two cytoarchitectonic visual areas on the human posterior fusiform gyrus

Functional characterization and differential coactivation patterns of two cytoarchitectonic visual areas on the human posterior fusiform gyrus

Sex differences of hemispheric lateralization for faces and Chinese characters in early perceptual processing

Language Disorders due to Posterior System Strokes - An Ignored Dysfunction

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