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The neural correlates of the unified percept of alcohol-related craving: a fMRI and EEG study

AbstractAlcohol addiction is accompanied by aberrant neural activity. Previously, task-based fMRI and resting-state EEG studies have revealed that craving, a critical component of addiction, is linked to abnormal activity in cortical regions including the dorsal anterior cingulate cortex (dACC), nucleus accumbens (NAcc), posterior cingulate cortex (PCC) and pregenual anterior cingulate cortex (pgACC), etc. In this study, we combine these two imaging techniques to investigate a group of alcohol-addicted patients and provide convergent evidence for the neural correlates of craving not only in alcohol but substance abuse in general. We observe abnormal BOLD signal levels in the dACC, NAcc, pgACC, PCC, amygdala, and parahippocampus (PHC) in a cue-reactivity fMRI experiment. These findings are consistent with increased beta-band activity in the dACC and pgACC in resting-state EEG. We further observe desynchronization characterized by decreased functional connectivity in cue-based fMRI and hypersynchronization characterized by increased functional connectivity between these regions in the theta frequency band. The results of our study show a consistent pattern of alcohol craving elicited by external cues and internal desires. Given the advantage of superior spatial and temporal resolution, we hypothesize a “central craving network” that integrates the different aspects of alcohol addiction into a unified percept.
- University of Otago New Zealand
- Texas State University United States
- University of Otago New Zealand
- The University of Texas at Dallas United States
- Katholieke Universiteit Leuven Belgium
Male, Brain Mapping, Ethanol, Brain, Electroencephalography, Middle Aged, Magnetic Resonance Imaging, Article, Behavior, Addictive, Oxygen, Alcoholism, Image Processing, Computer-Assisted, Humans, Female, Cues, Craving
Male, Brain Mapping, Ethanol, Brain, Electroencephalography, Middle Aged, Magnetic Resonance Imaging, Article, Behavior, Addictive, Oxygen, Alcoholism, Image Processing, Computer-Assisted, Humans, Female, Cues, Craving
citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).65 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Top 1% influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Top 10% impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Top 1%
