Synonyms for dysgnosia or Related words with dysgnosia
Examples of "dysgnosia"
David G. Cogan, in 1979, published an extensive work describing 17 cases of visuospatial
. Some examples of patients suffering from visuospatial
from Cogan's study are:
is a loss of the sense of "whereness" in the relation of oneself to one's environment and in the relation of objects to each other. Visuospatial
is often linked with topographical disorientation.
has many symptoms in common with Bálint's syndrome and can present simultaneously. Visuospatial
, along with Balint's syndrome, has been connected with Alzheimer's disease as a possible early sign of the disease. Generally, the first symptom of Alzheimer's onset is loss of memory, but visual or visuospatial dysfunction is the presenting symptom in some cases and is common later in the disease course.
Bilateral lesions produce more complex dysgnosic signs such as object anomia (inability to name an object), prosopagnosia (inability to recognize faces), alexia (inability to read), dressing apraxia, and memory impairment in conjunction with visuospatial
It can clearly be seen that visuospatial
does not present itself in the same ways, though all of the above cases were diagnosed with the disorder and other accompanying diseases.
Studies have narrowed the area of the brain that, when damaged, causes visuospatial
to the border of the occipito-temporoparietal region. Predominantly, lesions (damage, often from stroke) are found in the angular gyrus of the right hemisphere (in people with left-hemisphere language), and are usually unilateral, meaning in one hemisphere of the brain.
For patients with visuospatial
, the information input may be strengthened by adding tactile, motor, and verbal perceptual inputs. This comes from the general occupational therapy practice of teaching clients suffering from intellectual dysfunctions to use the most effective combinations of perceptual input modalities, which may enable them to complete a task.
Topographical disorientation, also known as topographical agnosia and topographagnosia, is the inability to orient oneself in one's surroundings as a result of focal brain damage. This disability may result from the inability to make use of selective spatial information (e.g., environmental landmarks) or to orient by means of specific cognitive strategies such as the ability to form a mental representation of the environment, also known as a cognitive map. It may be part of a syndrome known as visuospatial
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