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- W2001318423 abstract "This is the first neural imaging study to use regional cerebral blood flow (rCBF) in an animal model to identify the patterns of forebrain nociceptive processing that occur during the early and late phase of the formalin test. We measured normalized rCBF increases by an autoradiographic method using the radiotracer [99mTc]exametazime. Noxious formalin consistently produced detectable, well-localized and typically bilateral increases in rCBF within multiple forebrain structures, as well as the interpeduncular nucleus (Activation Index, AI = 66) and the midbrain periaqueductal gray (AI = 20). Structures showing pain-induced changes in rCBF included several forebrain regions considered part of the limbic system. The hindlimb region of somatosensory cortex was significantly activated (AI = 31), and blood flow increases in VPL (AI = 8.7) and the medial thalamus (AI = 9.0) exhibited a tendency to be greater in the late phase as compared to the early phase of the formalin test. The spatial pattern and intensity of activation varied as a function of the time following the noxious formalin stimulus. The results highlight the important role of the limbic forebrain in the neural mechanisms of prolonged persistent pain and provide evidence for a forebrain network for pain." @default.
- W2001318423 created "2016-06-24" @default.
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- W2001318423 date "1998-01-01" @default.
- W2001318423 modified "2023-10-07" @default.
- W2001318423 title "Regional changes in forebrain activation during the early and late phase of formalin nociception: analysis using cerebral blood flow in the rat" @default.
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- W2001318423 doi "https://doi.org/10.1016/s0304-3959(98)00016-5" @default.
- W2001318423 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/1839052" @default.
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