Abnormal temporal dynamics of visual attention in spatial neglect patients

Article Abstract:

Patients suffering from unilateral visual neglect have serious difficulty in identifying dual-target tasks. This shows that attentional blink is more pronounced in stroke patients with visual neglect than normal individuals and stroke patients without neglect. This temporal impairment may be caused by the visual system's delay in processing features of the target or by the items' competition for selection after their features have been conjoined.

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A vision over time and space

Article Abstract:

Vision works over time and space. This finding runs counter to the notion that vision is instantaneous. To provide an accurate description of objects seen and to perform coherent behavior, the brain selects only one object at a time. When it is given two tasks to perform simultaneously, attentional blink occurs. A study of patients with unilateral visual neglect reveals that stimulus at the neglected area takes a long time to be selected.

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Motor role of human inferior parietal lobe revealed in unilateral neglect patients

Article Abstract:

It is hypothesized that the parietal lobe subserves spatial perception in spatial cognition. Patients with inferior parietal lobe (IPL) lesions were found to have problems in initiating leftward movements towards visual targets on the left side of space. This impairment was not seen in neglect patients with frontal lesions, indicating that the human IPL acts as a sensorimotor interface.

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