Varieties of Hemispatial Neglect
Unilateral neglect is a heterogeneous syndrome with several subtypes, and it’s possible that many distinct disorders have been inaccurately lumped together under a single label. There is growing consensus that no single mechanism accounts for the full range of demonstrated symptoms. And it appears that impairments of several different mechanisms converge to result in neglect—each of which could exist singly without causing it. The complexity of attention alone—just one of several mechanisms that may interact—has generated multiple competing hypothetical explanations of neglect. So it’s not surprising that it’s proven difficult to assign particular presentations of neglect to specific neuroanatomical loci. But despite such limitations, we may loosely describe unilateral neglect with four overlapping variables: type, range, axis, and orientation.
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“Now there are varieties of gifts, but the same Spirit; and there are varieties of services, but the same Lord; and there are varieties of activities, but it is the same God who activates all of them in everyone.”
—Bible: New Testament, 1 Corinthians 12:4-6.
“Now there are varieties of gifts, but the same Spirit; and there are varieties of services, but the same Lord; and there are varieties of activities, but it is the same God who activates all of them in everyone.”
—Bible: New Testament, 1 Corinthians 12:4-6.
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—Blaise Pascal (1623–1662)