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Reward processing is an important factor in obesity, but other processes are also involved. Overview Sex, romantic love, and attachment: Finally, such similarities might highlight the need for consideration of obesity within the new DSM-V. Although specific features also likely distinguish pathological gambling from drug dependence much as specific features distinguish specific forms of substance dependence [ 29 ] , existing data suggest a particularly close relationship between pathological gambling and substance dependence that warrant their consideration within a category of addictions.

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Though DSM V is not scheduled for final publication until , the possibility of carving addiction at a different joint, somewhere beyond substances, has stimulated spirited exchange and more than a twinge of nosologic anxiety. It should be noted that some of the discrepant hyperactive versus hypoactive brain regions results could be due to methodological differences. Diminished ventral striatal activation has been observed in individuals with pathological gambling in the processing of monetary rewards during a gambling paradigm [ 49 ]. Opioid antagonists, such as naltrexone a drug with approval for the indications of opioid and alcohol dependence , represent the class of drugs that to date has shown the most promise in the treatment of pathological gambling, particularly amongst individuals with strong gambling urges at treatment onset and those with a family history of alcoholism [ 18 ]. This highly evolved system involves an extremely complex neurobiologic network, particularly the mesolimbic dopamine DA system — the ventral tegmental area in the midbrain and its projections to the nucleus accumbens, amygdala, ventral striatum, hippocampus, and medial prefrontal cortex e. They are obsessed by the other person so that their lives are oriented around them; they can be impulsive and lose control over their thoughts and behavior; they may abandon family to be with the beloved. Individuals with pathological gambling like those with drug dependence have been found to make disadvantageous choices on decision-making tasks like the Iowa Gambling Task [ 42 , 43 ]. The Sex Drive Sex is necessary for the survival of any species. More recently, subjects with substance use disorders with or without pathological gambling showed diminished ventromedial prefrontal cortical activation during performance of the Iowa Gambling Task [ 55 ]. In a recent study of functional connectivity within the reward network in response to high- and low-calorie food stimuli, Stoeckel et al. Once you join you also get access to our mobile app where you can narrow your search based on interests, photo filters, and location. In moderation, these behaviors are necessary. In another study, the relationship between obesity and hypofunctioning of the dorsal striatum was related to the presence of the A1 allele of the TaqI gene [ ]. Taken together, these findings indicate many common clinical and phenomenological features between pathological gambling and substance addictions. Having previously established that striatal dopamine D2 receptors levels are lower in obese individuals, Volkow et al. Obese individuals had a significantly higher resting metabolic activity than lean individuals in brain regions underlying sensations of the lips, tongue and mouth [ ]. They also found hypothalamic activation [ ], but in an area different from sexual arousal [ ] and long-term love [ ]. Neural Features The common clinical, phenomenological, genetic, personality and neurocognitive features between pathological gambling and substance dependence might be hypothesized to be reflected in shared neural features [ 35 ]. Romantic Love Fisher has hypothesized that romantic love is a developed form of a mammalian drive to pursue preferred mates [ , ], thus being an essential aspect of the human reproductive strategy and a strong influence on human behavior. For example, similar brain regions e. The brain and genetic vulnerabilities that allow pursuit of non-drug rewards to become pathologic are very likely to be important in the vulnerability to drug addiction. This phenomenon, first described for alcoholism, later for drug addiction and most recently for gambling, refers to the observation that although on average women begin engagement in the behavior later in life than do men, the time frame between initiation and problematic engagement is foreshortened or telescoped in women as compared to men [ 28 ]. Addiction and obesity A. Inclusionary criteria for pathological gambling share common features with those for substance dependence. In a morphometric assessment of brain volumes in obese individuals versus lean individuals, reductions in gray matter density were found in several brain areas i. Love includes obsessive behaviors and can ruin lives, just as substance abuse does.

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  1. Another recent study examined in healthy subjects the neural correlates of the near-miss phenomenon [ 56 ]. Opioid antagonists, such as naltrexone a drug with approval for the indications of opioid and alcohol dependence , represent the class of drugs that to date has shown the most promise in the treatment of pathological gambling, particularly amongst individuals with strong gambling urges at treatment onset and those with a family history of alcoholism [ 18 ].

  2. Personality and Neurocognitive Features Common personality and neurocognitive features have been described in pathological gambling and substance dependence.

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