Overall, N-CABS was found to be a reliable screening tool to assess six cognitive impairments including Attention, Memory, Naming, Arithmetic, Reasoning and Visual Neglect
. It has several advantages over other bedside cognitive tests commonly used to detect PSCI as it is inexpensive, less time consuming and more culturally relevant.
Visuospatial inattention, also termed visual neglect
or hemispatial neglect, can occur following right hemisphere stroke .
Humphreys, "Neuroanatomical dissections of unilateral visual neglect
symptoms: ALE meta-analysis of lesion-symptom mapping," Frontiers in Human Neuroscience, vol.
Damage to several different sites--but usually the parietal lobe--may cause a loss of awareness of one side of space; (35,36) this is known as unilateral visual neglect
. Patients may omit half of objects when drawing, or only eat food on one side of a plate.
Prevalence rates for peripheral visual field loss (such as homonymous hemianopia) vary from 14% to 20% (Brahm, Wilgenburg, Kirby, Ingalla, Chang & Goodrich, 2007), while visual neglect
has a prevalence rate of 43% (Ringman, 2004).
The second behavioral section comprises nine tests selected by psychologists and occupational therapists and based on specific difficulties faced by patients with visual neglect
in everyday life situations, such as picture scanning, phone dialing, menu reading, article reading, telling and setting the time, coin sorting, address and sentence copying, map navigation, and card sorting.
Supervised versus home physiotherapy outcomes in stroke patients with unilateral visual neglect
: A randomized controlled follow-up study.
is a common deficit after unilateral brain injury, particularly following strokes centered on the right superior and inferior parietal lobes; however, other influential areas also exist, including the frontal lobes, anterior cingulate cortex, frontal eye fields, basal ganglia, and thalamus (32-38).
All nine patients studied with the detection test had visual neglect
in both neuropsychological and visual detection tests.
Spatial cognition: evidence from visual neglect
. Trends Cogn Sci 2003;7: 125-33.
A simple test of visual neglect
. Neurology, 23, 658-664.
A simple method to dissociate sensory-attentional and motor-intentional biases in unilateral visual neglect
. Brain and Cognition, 58, 269-273.