scholarly journals Functional Architecture of Retinotopy in Visual Association Cortex of Behaving Monkey

2005 ◽  
Vol 15 (4) ◽  
pp. 460-478 ◽  
Author(s):  
B. Heider
Keyword(s):  
Association Cortex ◽  
Functional Architecture ◽  
Visual Association Cortex

Functional Architecture of Eye Position Gain Fields in Visual Association Cortex of Behaving Monkey

2003 ◽  
Vol 90 (2) ◽  
pp. 1279-1294 ◽  
Author(s):  
Ralph M. Siegel ◽  
Milena Raffi ◽  
Raymond E. Phinney ◽  
Jessica A. Turner ◽  
Gábor Jandó
Keyword(s):  
Cortical Neurons ◽  
Visual Information ◽  
Parietal Lobe ◽  
Association Cortex ◽  
Eye Position ◽  
Visual Response ◽  
Topographic Map ◽  
Functional Architecture ◽  
Visual Association Cortex ◽  
Area 7A

In the behaving monkey, inferior parietal lobe cortical neurons combine visual information with eye position signals. However, an organized topographic map of these neurons' properties has never been demonstrated. Intrinsic optical imaging revealed a functional architecture for the effect of eye position on the visual response to radial optic flow. The map was distributed across two subdivisions of the inferior parietal lobule, area 7a and the dorsal prelunate area, DP. Area 7a contains a representation of the lower eye position gain fields while area DP represents the upper eye position gain fields. Horizontal eye position is represented orthogonal to the vertical eye position across the medial lateral extents of the cortices. Similar topographies were found in three hemispheres of two monkeys; the horizontal and vertical gain field representations were not isotropic with a greater modulation found with the vertical. Monte Carlo methods demonstrated the significance of the maps, and they were verified in part using multiunit recordings. The novel topographic organization of this association cortex area provides a substrate for constructing representations of surrounding space for perception and the guidance of motor behaviors.

Hemimicropsia in a Patient with a Cavernoma of the Visual Association Cortex: Imaging Analysis Utilizing a New 3D Brain Atlas System and fMRI

NeuroImage ◽  
1998 ◽  
Vol 7 (4) ◽  
pp. S358 ◽  
Author(s):  
J. Kassubek ◽  
M. Otte ◽  
T. Wolter ◽  
M.W. Greenlee ◽  
T. Mergner ◽  
...  
Keyword(s):  
Brain Atlas ◽  
Association Cortex ◽  
Imaging Analysis ◽  
Visual Association Cortex

scholarly journals The Role of Visual Association Cortex in Associative Memory Formation across Development

2018 ◽  
Vol 30 (3) ◽  
pp. 365-380 ◽  
Author(s):  
Maya L. Rosen ◽  
Margaret A. Sheridan ◽  
Kelly A. Sambrook ◽  
Matthew R. Peverill ◽  
Andrew N. Meltzoff ◽  
...  
Keyword(s):  
Associative Memory ◽  
Visual Processing ◽  
Memory Performance ◽  
Neural Mechanism ◽  
Association Cortex ◽  
Associative Memories ◽  
Associate Learning ◽  
Visual Association Cortex ◽  
Age Related

Associative learning underlies the formation of new episodic memories. Associative memory improves across development, and this age-related improvement is supported by the development of the hippocampus and pFC. Recent work, however, additionally suggests a role for visual association cortex in the formation of associative memories. This study investigated the role of category-preferential visual processing regions in associative memory across development using a paired associate learning task in a sample of 56 youths (age 6–19 years). Participants were asked to bind an emotional face with an object while undergoing fMRI scanning. Outside the scanner, participants completed a memory test. We first investigated age-related changes in neural recruitment and found linear age-related increases in activation in lateral occipital cortex and fusiform gyrus, which are involved in visual processing of objects and faces, respectively. Furthermore, greater activation in these visual processing regions was associated with better subsequent memory for pairs over and above the effect of age and of hippocampal and pFC activation on performance. Recruitment of these visual processing regions mediated the association between age and memory performance, over and above the effects of hippocampal activation. Taken together, these findings extend the existing literature to suggest that greater recruitment of category-preferential visual processing regions during encoding of associative memories is a neural mechanism explaining improved memory across development.

O1-01-08: Pathological evidence of dense Alzheimer lesions in the visual association cortex of cognitively intact elderly subjects

2006 ◽  
Vol 2 ◽  
pp. S10-S10
Author(s):  
Ann C. McKee ◽  
Rhoda Au ◽  
Howard J. Cabral ◽  
Neil W. Kowall ◽  
Sudha Seshadri ◽  
...  
Keyword(s):  
Association Cortex ◽  
Elderly Subjects ◽  
Visual Association Cortex ◽  
Cognitively Intact

Processing of color and luminance in visual association cortex

NeuroImage ◽  
1996 ◽  
Vol 3 (3) ◽  
pp. S266
Author(s):  
Mitchell Brigell ◽  
Antonio Strafella ◽  
Gastone Celesia
Keyword(s):  
Association Cortex ◽  
Visual Association Cortex

Attention Reduces Variability of Goal-relevant Perceptual Representations within Visual Association Cortex

NeuroImage ◽  
2009 ◽  
Vol 47 ◽  
pp. S65 ◽  
Author(s):  
S.H. Song ◽  
A.J. Chen ◽  
T.J. Nycum ◽  
G.R. Turner ◽  
E. Jacobs ◽  
...  
Keyword(s):  
Association Cortex ◽  
Visual Association Cortex ◽  
Perceptual Representations

Afferent connections of the prelunate visual association cortex (areas V4 and DP)

1990 ◽  
Vol 181 (1) ◽  
Author(s):  
M. Tanaka ◽  
E. nLindsley ◽  
S. Lausmann ◽  
O.D. Creutzfeldt
Keyword(s):  
Association Cortex ◽  
Afferent Connections ◽  
Visual Association Cortex

scholarly journals A Connectome Wide Functional Signature of Transdiagnostic Risk for Mental Illness

2017 ◽  
Author(s):  
Maxwell L. Elliott ◽  
Adrienne Romer ◽  
Annchen R. Knodt ◽  
Ahmad R. Hariri
Keyword(s):  
Mental Illness ◽  
Executive Control ◽  
Past Research ◽  
Association Cortex ◽  
General Factor ◽  
Visual Association Cortex ◽  
Intrinsic Connectivity ◽  
Therapeutic Mechanisms ◽  
P Factor ◽  
Shared Risk

AbstractBackgroundHigh rates of comorbidity, shared risk, and overlapping therapeutic mechanisms have led psychopathology research towards transdiagnostic dimensional investigations of clustered symptoms. One influential framework accounts for these transdiagnostic phenomena through a single general factor, sometimes referred to as the ‘p’ factor, associated with risk for all common forms of mental illness.MethodsHere we build on past research identifying unique structural neural correlates of the p factor by conducting a data-driven analysis of connectome wide intrinsic functional connectivity (n = 605).ResultsWe demonstrate that higher p factor scores and associated risk for common mental illness maps onto hyper-connectivity between visual association cortex and both frontoparietal and default mode networks.ConclusionsThese results provide initial evidence that the transdiagnostic risk for common forms of mental illness is associated with patterns of inefficient connectome wide intrinsic connectivity between visual association cortex and networks supporting executive control and self-referential processes, networks which are often impaired across categorical disorders.

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