Understanding Visual-Spatial Perceptual Deficits in Individuals with Multiple Sclerosis: An Analysis of Patient Performance on the Hooper Visual Organization Test and Visual Form Discrimination

2021 ◽  
pp. 1-9
Author(s):  
Samuel T. Gontkovsky
Keyword(s):  
Multiple Sclerosis ◽  
Form Discrimination ◽  
Visual Form ◽  
Visual Spatial ◽  
Visual Organization ◽  
Patient Performance

scholarly journals Measuring visual form discrimination with blur thresholds

2013 ◽  
Vol 13 (5) ◽  
pp. 13-13 ◽  
Author(s):  
G. Westheimer
Keyword(s):  
Form Discrimination ◽  
Visual Form

Functional MRI neuroanatomic correlates of the Hooper Visual Organization Test

2004 ◽  
Vol 10 (7) ◽  
pp. 939-947 ◽  
Author(s):  
CHAD H. MORITZ ◽  
STERLING C. JOHNSON ◽  
KATHRYN M. MCMILLAN ◽  
VICTOR M. HAUGHTON ◽  
M. ELIZABETH MEYERAND
Keyword(s):  
Right Hemisphere ◽  
Parietal Lobe ◽  
Neuropsychological Test ◽  
Occipital Cortex ◽  
Normal Subjects ◽  
Object Identification ◽  
Visual Spatial ◽  
Dorsolateral Prefrontal ◽  
Fmri Analysis ◽  
Visual Organization

The Hooper Visual Organization Test (VOT), a commonly applied neuropsychological test of visual spatial ability, is used for assessing patients with suspected right hemisphere, or parietal lobe involvement. A controversy has developed over whether the inferences of this test metric can be assumed to involve global, lateralized, or regional functionality. In this study, the characteristic visual organization and object naming aspects of the VOT task presentation were adapted to a functional MR imaging (fMRI) paradigm to probe the neuroanatomic correlates of this neuropsychological test. Whole brain fMRI mapping results are reported on a cohort of normal subjects. Bilateral fMRI responses were found predominantly in the posterior brain, in regions of superior parietal lobules, ventral temporal-occipital cortex, and posterior visual association areas, and to a lesser extent, the frontal eye fields bilaterally, and left dorsolateral prefrontal cortex. The results indicate a general brain region or network in which VOT impairment, due to its visuospatial and object identification demands, is possible to be detected. Discussion is made of interpretive limitations when adapting neuropsychological tests to fMRI analysis. (JINS, 2004, 10, 939–947.)

Individuals With 22q11.2 Deletion Syndrome Are Impaired at Explicit, But Not Implicit, Discrimination of Local Forms Embedded in Global Structures

2014 ◽  
Vol 119 (3) ◽  
pp. 261-275 ◽  
Author(s):  
Anne Giersch ◽  
Bronwyn Glaser ◽  
Catherine Pasca ◽  
Mélanie Chabloz ◽  
Martin Debbané ◽  
...  
Keyword(s):  
Visual Information ◽  
Discrimination Task ◽  
22Q11.2 Deletion Syndrome ◽  
Deletion Syndrome ◽  
Local Processing ◽  
Visual Scanning ◽  
Form Discrimination ◽  
22Q11.2 Deletion ◽  
Visual Form ◽  
The Impact

Abstract Individuals with 22q11.2 deletion syndrome (22q11.2DS) are impaired at exploring visual information in space; however, not much is known about visual form discrimination in the syndrome. Thirty-five individuals with 22q11.2DS and 41 controls completed a form discrimination task with global forms made up of local elements. Affected individuals demonstrated clear impairment in detecting local, but not global, differences. Nevertheless, 22q11.2DS participants easily discriminated the same local elements when they were displayed in isolation, and further use of a prime demonstrated preserved facilitation of local processing in 22q11.2DS. These results did not differ by age or IQ. This study illustrates the impact of visuospatial impairments on form discrimination, and suggests how these difficulties may affect visual scanning in 22q11.2DS.

scholarly journals C-60Cognitive Mediation Strategies of Benton's Visual Form Discrimination Test

2016 ◽  
Vol 31 (6) ◽  
pp. 662.3-662
Author(s):  
H Aaron ◽  
J Moses ◽  
B Davis ◽  
D Thimpson ◽  
M Eng
Keyword(s):  
Discrimination Test ◽  
Form Discrimination ◽  
Visual Form

scholarly journals Visual form discrimination: Multidimensional analyses

1968 ◽  
Vol 3 (6) ◽  
pp. 401-406 ◽  
Author(s):  
D. R. Brown ◽  
Martin H. Andrews
Keyword(s):  
Form Discrimination ◽  
Visual Form

Psychometric Analysis of the Visual Form Discrimination Test

2001 ◽  
Vol 92 (2) ◽  
pp. 449-455 ◽  
Author(s):  
Aaron Malina ◽  
Theresa Regan ◽  
Dana Bowers ◽  
Scott Millis
Keyword(s):  
Psychometric Analysis ◽  
Discrimination Test ◽  
Form Discrimination ◽  
Visual Form
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