Mapping of functional organization in human visual cortex

Lee, H.W.; Hong, Seung Bong; Seo, Dae Won; Tae, Woo Suk; Hong, Seung Chyul

doi:10.1212/wnl.54.4.849

Cited by 168 publications

(121 citation statements)

References 18 publications

Supporting

Mentioning

110

Contrasting

Unclassified

Order By: Relevance

“…Generating mental images does involve fusiform activation (D'Esposito et al, 1997). The correlation between illusions and smaller fusiform volume is more clear as direct electrical stimulation of the fusiform gyrus in epilepsy patients produces complex visual illusions such as faces, animals, panoramas, images from memory, and metamorphopsia (Lee et al, 2000), not unlike what is described by the SPD subjects in this study. Future functional imaging studies of fusiform activity may be important to more fully understand the role of this gyrus in schizophrenia spectrum disorders.…”

Section: Discussionmentioning

confidence: 51%

See 1 more Smart Citation

A MRI study of fusiform gyrus in schizotypal personality disorder

Dickey

McCarley

Voglmaier

et al. 2003

Schizophrenia Research

View full text Add to dashboard Cite

The fusiform gyrus is important for face and object recognition, is abnormal in schizophrenia, but has not been studied in schizotypal personality disorder (SPD). Thin-slice MR images showed no differences, either in right, left or total fusiform gyri volumes, between subjects with SPD (N = 21) and normal controls (N = 19). However, there was a correlation between severity of illusions and magical thinking suffered by the SPD subjects and smaller right fusiform gyrus volumes. This suggests that future studies may be useful in determining the functional competence of this gyrus in SPD.

show abstract

Section: Discussionmentioning

confidence: 51%

“…In addition, direct electrical stimulation of the gyrus can result in the formation of complex visual illusions (Lee et al, 2000). In schizophrenia, studies show that the fusiform gyrus evinces bilateral volume reductions in both a postmortem study (McDonald et al, 2000) and in an in vivo structural MRI study (Lee et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

A MRI study of fusiform gyrus in schizotypal personality disorder

Dickey

McCarley

Voglmaier

et al. 2003

Schizophrenia Research

View full text Add to dashboard Cite

show abstract

“…Both light and dark phosphenes have been evoked in sighted humans but rarely in blind humans (Brindley and Lewin, 1968;Dobelle and Mladejovsky, 1974;Schmidt et al, 1996;Lee et al, 2000). Also there is some suggestion that the evocation of coloured phosphenes occurs less frequently (and often not at all) in blind humans (Dobelle, 2000).…”

Section: Effects Of Blindnessmentioning

confidence: 99%

Phosphene induction by microstimulation of macaque V1

Tehovnik

Slocum

2007

Brain Research Reviews

View full text Add to dashboard Cite

Non-human primates are being used to develop a cortical visual prosthesis for the blind. We use the properties of electrical microstimulation of striate cortex (area V1) of macaque monkeys to make inferences about phosphene induction. Our analysis is based on well-established properties of V1: retino-cortical magnification factor, receptive-field size, and the characteristics of hypercolumns. We argue that phosphene size is dependent on the amount of current delivered to V1 and on the retino-cortical magnification factor. We suggest that to improve the correspondence between the site of stimulation within V1 and the visual field location of an elicited phosphene both eyes must be put under experimental control given that phosphene location is retinocentric and given that the vergence angle between the eyes might affect the position of a phosphene in depth. Knowing how electrical microstimulation interacts with cortical tissue to evoke percepts in behaving macaque monkeys is fundamental to the establishment of an effective cortical visual prosthesis for the blind.

show abstract

“…2 gyrus volume was correlated with short-term and long-term true and false memories, and these associations were independent of the effect of the hippocampus. The role of the fusiform gyrus in false memory is further supported by studies showing that electrical stimulation of the fusiform gyrus produced complex visual illusions like faces, animals, and images from memory in epilepsy patients (Lee et al 2000). The cortical grey matter volume is the product of cortical surface area and cortical thickness.…”

Section: Discussionmentioning

confidence: 89%

Hippocampal size is related to short-term true and false memory, and right fusiform size is related to long-term true and false memory

et al. 2015

View full text Add to dashboard Cite

Hippocampal size is related to short-term true and false memory, and right fusiform size is related to long-term true and false memory Abstract There is a keen interest in identifying specific brain regions that are related to individual differences in true and false memories. Previous functional neuroimaging studies showed that activities in the hippocampus, right fusiform gyrus, and parahippocampal gyrus were associated with true and false memories, but no study thus far has examined whether the structures of these brain regions are associated with short-term and long-term true and false memories. To address that question, the current study analyzed data from 205 healthy young adults, who had valid data from both structural brain imaging and a misinformation task. In the misinformation task, subjects saw the crime scenarios, received misinformation, and took memory tests about the crimes an hour later and again after 1.5 years. Results showed that bilateral hippocampal volume was associated with short-term true and false memories, whereas right fusiform gyrus volume and surface area were associated with long-term true and false memories. This study provides the first evidence for the structural neural bases of individual differences in short-term and long-term true and false memories.

show abstract

Mapping of functional organization in human visual cortex

Abstract: Different modalities of vision, such as form, color, and moving sensation, appeared to be distributed and organized in different areas of the human visual cortex.

Cited by 168 publications

References 18 publications

A MRI study of fusiform gyrus in schizotypal personality disorder

A MRI study of fusiform gyrus in schizotypal personality disorder

Phosphene induction by microstimulation of macaque V1

Hippocampal size is related to short-term true and false memory, and right fusiform size is related to long-term true and false memory

Contact Info

Product

Resources

About