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Taking a gamble.

A new law intended to make access to gambling easier could put more people at risk of gambling addiction. Currently there is little mental healthcare provision for people who get into difficulties. Gambling is being promoted as a leisure activity. Casinos can now sign up members without the need for a 24-hour cooling-off period. People addicted to gambling experience physical symptoms if they fail to get their 'fix'. Some gambling addicts have dual addictions as they are also addicted to drugs or alcohol.

Behavior, Addictive↗
PubMed1981

Bulimia: a report of 34 cases.

A series of 34 patients with Bulimia is presented. The patients were young females who usually experienced the onset of eating problems by early adulthood. Most had binge eating episodes on a daily basis, frequently followed by vomiting. Although the majority had never had active anorexia nervosa, all of these patients demonstrated characteristics often described in anorectic patients including a preoccupation with food and an exaggerated fear of becoming obese. Many appeared to be clinically depressed. The association between stealing behavior, chemical abuse and bulimia suggests problems with impulse control in this population.

Adolescent↗
PubMed2001

Pathological gamblers, with and without substance use disorders, discount delayed rewards at high rates.

Pathological gambling is classified as a disorder of impulse control, yet little research has evaluated behavioral indices of impulsivity in gamblers. The rates at which rewards delayed in time are subjectively devalued may be a behavioral marker of impulsivity. This study evaluated delay discounting in 60 pathological gamblers and 26 control participants. Gamblers were divided into those with (n = 21) and without (n = 39) substance use disorders. A hypothetical $1,000 reward was delayed at intervals ranging from 6 hr to 25 years, and immediate rewards varied from $1 to $999. Pathological gamblers discounted delayed rewards at higher rates than control participants, and gamblers with substance use disorders discounted delayed rewards at higher rates than non-substance-abusing gamblers. These data provide further evidence that rapid discounting of delayed rewards may be a feature central to impulse control and addictive disorders, including pathological gambling.

Adult↗
PubMed2002

Impulsivity and aggression as predictors of suicide attempts in alcoholics.

INTRODUCTION: The aim of this study was to assess the potential role of impulsive and aggressive behavior in the pathogenesis of suicide attempts in alcoholics. Impulsive and aggressive behavior as well as a psychiatric comorbidity with depressive conditions and personality disorders have been reported to be significant risk factors for suicide attempts in alcoholics. We hypothesized that alcoholics with a history of violent suicide attempts show an increased level of impulsive and aggressive behavior. Furthermore, the potential influence of concurrent personality disorders and depressive conditions were assessed. MATERIAL AND METHODS: 182 detoxified alcohol-dependent subjects were enrolled into the study. Impulsive and aggressive traits were assessed using the Buss-Durkee Hostility Inventory and the Brown-Goodwin Assessment for Lifetime History of Aggression, personality disorders using the SCID II. Characteristics of alcohol dependence and suicide attempts were evaluated using the Semi-Structured Assessment on Genetics in Alcoholism (SSAGA). RESULTS: Alcohol-dependent subjects with a history of suicidal behavior show a profile with higher impulsive and aggressive behavior. No significant association between these traits and concurrent borderline and antisocial personality disorder was found. Subjects with suicide attempts tended to have a significantly higher rate of depressive disorders. DISCUSSION: These results suggest that impulsive and aggressive traits might contribute significantly to the risk of suicide attempts in alcoholics.

Adult↗
PubMed1995

The significance of aggression and impulsivity for self-mutilative behavior.

Self-mutilative behavior (SMB) is presented as a specific form of inwardly directed aggressiveness which is thought to be associated with problems of impulse control. Conceptual problems concerning impulsivity and impulsive aggression are discussed. Among different forms of dyscontrolled behavior, SMB is of special heuristic interest because of distinction can be made between patients committing impulsive and those committing premeditated self-harming actions. Psychometric and biological measures of impulsivity and aggressiveness were assessed in self-mutilators in comparison to depressives and normal probands. Self-mutilators were differentiated into two subgroups, those with an impulsive (ISMB) and those with a premeditated (PSMB) form of SMB, and depressives were also differentiated into two subgroups, those with a history of suicide attempts and those without. Only patients with ISMB (and depressives with a history of suicide attempts) showed an enduring tendency towards dyscontrolled patterns of behavior and cognition; therefore, SMB cannot be generally regarded as an indicator of high impulsivity or an impulse control disorder. Measures of impulsivity and aggressiveness did not behave analogically to each other and aggressive or autoaggressive modes of behavior should not be generally used as an index of impulsivity. A reduction of serotonergic activity, proved by a blunted prolactin response to D-fenfluramine, was found in all patient-groups in comparison to normal probands. Prolactin response after D-fenfluramine challenge turned out to be most blunted among self-mutilators with ISMB and among depressives with a history of suicide attempts.

Adult↗
PubMed2005

Brain maturation and its relevance to understanding criminal culpability of juveniles.

The purpose of this review is to summarize current understanding of the process of maturation in human brains during the juvenile period to young adulthood. We describe the methods used in such investigations, and outline the main findings regarding the course of brain development. There is much that we do not know about brain maturation, but there is congruence of evidence indicating that brain maturation is not complete until young adulthood (approximately age 21 years). Furthermore, the main index of maturation, which is rate of myelination, points to large variability in the rate of maturation among brain regions. Generally, maturation of association cortex is not complete by late adolescence, and within this cortex the prefrontal regions are last to mature. The review concludes by discussing the behavioral implications of these findings. The role of myelination is to focus and refine the operation of neural networks regulating behavior, and the frontal lobes specifically modulate and inhibit impulses, shaping behavior within the context of the environment in relation to planned action and long-term goals. Because the brain anatomy data indicate that people are not biologically prepared to exercise mature executive control required for full criminal intent until they reach adulthood, juveniles have diminished capacity in this regard and should not be eligible for the most severe punishment available for their crime.

Brain↗
PubMed2005

Tryptophan depletion disrupts the motivational guidance of goal-directed behavior as a function of trait impulsivity.

Serotonin (5-HT) is well known to affect the motivational properties of stimuli predictive of rewards as well as the inhibitory control of behavior. Here, central 5-HT depletion was induced by the acute tryptophan (TRP) depletion (ATD) procedure in young healthy volunteers to examine the role of 5-HT in motivated action and prepotent response inhibition. A novel reaction-time task, tailored to individual differences in general cognitive speed, was employed to measure the guidance of behavior by motivationally relevant signals predictive of reinforcement likelihood, while the stop-signal reaction-time task was used to measure response inhibition. Following the TRP-balancing control drink, cues predictive of high-reinforcement certainty induced faster, but less accurate responses compared with cues predictive of lower reinforcement certainty. Depletion of central 5-HT modulated this coupling between motivation and action by slowing responses and increasing accuracy as a function of incentive certainty. These effects of ATD on motivated action correlated highly with individual differences in the personality trait of Nonplanning Impulsiveness (Barratt Impulsivity Scale (BIS-11)), so that strongest effects on motivated action were observed in high-impulsive individuals. By contrast, ATD left unaltered the ability to inhibit prepotent responses. Our findings may have implications for a variety of neuropsychiatric disorders including impulsive aggressive disorders and depression.

Adult↗
PubMed2004

Common genetic effects on variation in impulsivity and activity in mice.

Impulsivity is a complex psychological construct that impacts on behavioral predispositions in the normal range and has been shown to have a genetic element through the examination of hereditary patterns of abnormal conditions such as attention deficit/hyperactivity disorder and obsessive compulsive disorder. In this study, we took advantage of the isogenic nature of inbred strains of mice to determine the contribution of genes to impulsive behaviors by examining the performance of four separate mouse strains in a novel murine delayed-reinforcement paradigm, during which the animals had to choose between rewards that were relatively small but available immediately and larger but progressively delayed rewards. To control for maternal effects, all the mice were cross-fostered to a common strain immediately after birth. Under these conditions, we found significant differences between the strains on behaviors indexing impulsive choice and on independent measures of locomotor activity, which subsequent heritability analysis showed could be related, in part, to genetic effects. Moreover, the two aspects of behavior were found to co-vary, with the more active animals also displaying more impulsive behavior. This was not attributable to mundane confounds related to individual task requirements but instead indicated the existence of common genetic factors influencing variation in both impulsivity and locomotor activity. The data are discussed in terms of the coexistence of impulsivity and hyperactivity, interactions between environmental and genetic effects, and possible candidate genes.

Animals↗