China
Africa
Explore chapters and articles related to this topic
Bálint Syndrome (including Simultagnosia)
Published in Alexander R. Toftness, Incredible Consequences of Brain Injury, 2023
For example, when looking at a scene full of objects, such as a desk covered in office supplies, a person with simultagnosia is likely to notice only one thing at a time. This is not limited by the size of the object, but rather by the extent of its form. If they notice the stapler, they can see the whole stapler's form. On the other hand, if they notice the printer, they can see the form of the whole printer. The person can switch their focus to another form, especially if somebody asks them to switch. Although switching between a complicated group of objects such as letters or shapes may become confusing quickly, which can make tasks like reading very taxing. If given enough time, they can look at each object in turn and eventually see the whole desk in this piecemeal fashion, but they do not experience the objects as being “together” or part of a single scene.
Cortical Visual Loss
Published in Vivek Lal, A Clinical Approach to Neuro-Ophthalmic Disorders, 2023
Simultanagnosia has been linked to lesions of the dorsal occipital lobes, in Brodmann's areas 18 and 19 (384). There can also be contributions from damage to other components of a visual attention network, such as the middle frontal gyrus and white matter connections in the inferior and superior longitudinal fasciculi (390).
Psychology and Human Development EMIs
Published in Michael Reilly, Bangaru Raju, Extended Matching Items for the MRCPsych Part 1, 2018
F, J. Individuals with colour agnosia can tell differences between colours but not name them. Simultanagnosia refers to being able to perceive individual parts of a picture without being able to tell what the whole depicts. [B. p20]
Integrating visual search, eye movement training and reversing prism exposure in the treatment of Balint-Holmes syndrome: a single case report
Published in Topics in Stroke Rehabilitation, 2022
Francesco Panico, Angela Arini, Pierluigi Cantone, Claudio Crisci, Luigi Trojano
Balint-Holmes Syndrome (BHS) is characterized by simultanagnosia, ocular apraxia, and optic ataxia.1 Simultanagnosia has been described in a “dorsal” form, precluding the detection of multiple objects, and in a “ventral” form, causing difficulties in simultaneously recognizing the individual parts of an object.2 Ocular apraxia is an impairment of visual fixation related to defective saccade initiation and limited visual pursuit.3 Optic ataxia corresponds to the difficulty in performing arm movements directed at visual objects, in the absence of primary visual, proprioceptive or motor disorders.4
Numeric input operation on electronic devices among individuals with visuospatial working memory impairment
Published in Neuropsychological Rehabilitation, 2021
Kosaku Sunagawa, Michitaka Funayama, Yoshitaka Nakagawa, Rumi Tanemura
Based on the results of this study, individuals with a dorsal simultanagnosia are likely to face difficulties when using modern electronic devices. In particular, factors related to visuospatial working memory should be considered as possible problems. The number of people with cognitive deficits, including visuospatial working memory impairment, are necessary to use the electronic devices in modern society. Regarding the modern electronic devices, we should consider visuospatial working memory to facilitate the use of more people.
Simultanagnosia as the presenting symptom in neuro-ophthalmology
Published in Baylor University Medical Center Proceedings, 2020
Rui Wang, Grant Hopping, Bayan Al Othman, Subhan Tabba, Ashwini Kini, Andrew G. Lee
Simultanagnosia is a well-known neurologic symptom and is often found in combination with a triad of symptoms comprising Balint syndrome. We report two cases presenting with simultanagnosia and juxtaposed homonymous visual field loss primarily due to parieto-occipital disease, with simultanagnosia suggested using the Ishihara color plates. Simultanagnosia can be the presenting symptom of neuro-ophthalmic disease.