Objective-A patient with a right posterior cerebral artery territory infarction and a left superior quadrantanopia exhibited improvement on various visual tasks including Goldmann perimetry during extreme right gaze. The phenomenon was investigated by functional imaging of cerebral blood flow. Methods-[99mTc]HMPAO SPECT was carried out while the patient gazed to the right and to the left at an 8 Hz flash stimulus. Results-When compared with left gaze, photic stimulation during right gaze was associated with an up to 39.8% increase in regional cerebral blood flow in the damaged right hemisphere, including Brodmann's areas 3-1-2, 7, 21, 22, 39, and 40. Conclusions-These gaze related alterations in function and synaptic activity suggest the engagement of a novel arousal-like mechanism that may account in part for comparable findings in patients with neglect and other disorders, and may have relevance to rehabilitation.
CITATION STYLE
Nadeau, S. E., Crosson, B., Schwartz, R. L., & Heilman, K. M. (1997). Gaze related enhancement of hemispheric blood flow in a stroke patient. Journal of Neurology Neurosurgery and Psychiatry, 62(5), 538–540. https://doi.org/10.1136/jnnp.62.5.538
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