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- W2040377634 abstract "Summary Brain 11C-diprenorphine positron emission tomography scans help clinicians to select the best candidates for motor cortex stimulation among patients with severe refractory neuropathic pain. The clinical effects of motor cortex stimulation (MCS) for neuropathic pain (NP) is thought to be mediated primarily by the secretion of endogenous opioids in humans and in animal models. Because opioid receptor density is itself decreased in patients with NP, we investigated whether the magnitude and distribution of the remaining opioid receptors in patients with NP could be biological predictors of the pain-relieving effects of MCS. Using 11C-diprenorphine positron emission tomography scans, opioid receptor availability was assessed in 15 patients suffering refractory NP, who subsequently received chronically implanted MCS. All patients underwent 2 preoperative baseline scans at 2-wk intervals and were clinically assessed after 7 mo of chronic MCS. The levels of preoperative opioid-binding in the insula, thalamus, periaqueductal gray, anterior cingulate, and orbitofrontal cortex were significantly and positively correlated with postoperative pain relief at 7 mo. Patients with receptor density values below the lower limits in age-matched controls in the thalamus, periaqueductal gray and contralateral insula were the least likely to benefit from MCS. Opioid-receptor availability as shown in preoperative positron emission tomography scans appears to be related to the efficacy of MCS in NP and may help clinicians to select the candidates most likely to benefit from this procedure." @default.
- W2040377634 created "2016-06-24" @default.
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- W2040377634 date "2013-11-01" @default.
- W2040377634 modified "2023-10-17" @default.
- W2040377634 title "Brain opioid receptor density predicts motor cortex stimulation efficacy for chronic pain" @default.
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- W2040377634 doi "https://doi.org/10.1016/j.pain.2013.07.042" @default.
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