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J Neurophysiol (March 25, 2009). doi:10.1152/jn.00141.2009
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101/6/2738    most recent
00141.2009v1
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Submitted on February 17, 2009
Revised on March 17, 2009
Accepted on March 23, 2009

Anticipatory Changes in Regional Cerebral Hemodynamics: A New Role for Dopamine?

Can Ozan Tan1*

1 Harvard Medical School

* To whom correspondence should be addressed. E-mail: cotan{at}partners.org.

Recently, adaptively timed, anticipatory changes in hemodynamic responses, independent of neural activity, were described in primate primary visual cortex. Task-related properties of these responses point to a possible link between regional cerebral microcirculation and dopaminergic signaling. In this paper, this link is elaborated on the basis of known physiological data, and further experiments are proposed to test the possible role of dopamine in task-dependent, "on-demand" allocation of metabolic resources.






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