The role of neuronal signaling in controlling cerebral blood flow
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作者:
Drake, Carrie T.
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机构:
Cornell Univ, Weill Med Coll, Div Neurobiol, Dept Neurol & Neurosci, New York, NY 10128 USACornell Univ, Weill Med Coll, Div Neurobiol, Dept Neurol & Neurosci, New York, NY 10128 USA
Drake, Carrie T.
[1
]
Iadecola, Costantino
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Cornell Univ, Weill Med Coll, Div Neurobiol, Dept Neurol & Neurosci, New York, NY 10128 USACornell Univ, Weill Med Coll, Div Neurobiol, Dept Neurol & Neurosci, New York, NY 10128 USA
Iadecola, Costantino
[1
]
机构:
[1] Cornell Univ, Weill Med Coll, Div Neurobiol, Dept Neurol & Neurosci, New York, NY 10128 USA
Well-regulated blood flow within the brain is vital to normal function. The brain's requirement for sufficient blood flow is ensured by a tight link between neural activity and blood flow. The link between regional synaptic activity and regional cerebral blood flow, termed functional hyperemia, is the basis for several modern imaging techniques that have revolutionized the study of human brain activity. Here, we review the mechanisms of functional hyperemia and their implications for interpreting the blood oxygen level-dependent (BOLD) contrast signal used in functional magnetic resonance imaging (fMRI). (c) 2006 Elsevier Inc. All rights reserved.