Visual hemi-neglect (aka visual hemifield-neglect) refers to the inability to pay attention to or notice stimuli from one-half of the visual field (i.e., the right or left side of a scene or object) even though more basic visual field abilities are intact. Often, the loss occurs on the left side of the visual world as the result of right parietal lobe damage. As represented in the image below, a patient with hemi-neglect might perceive the only the right half of an object, and if asked to copy a drawing, they are likely to omit the material on the left. Similarly, such patients often eat only the food on the right half of the plate, leaving that on the left. But when the plate is rotated 180 degrees they perceive, and may then consume the food that was initially on the left.
|Apperceptive Agnosia||Go to Associative Agnosias|