Article

Subjective self-control and behavioral impulsivity coexist in anorexia nervosa

Department of Psychology, University of Greenwich, Eltham, London SE9 2UG, UK.
Eating Behaviors (Impact Factor: 1.58). 07/2005; 6(3):221-7. DOI: 10.1016/j.eatbeh.2004.11.002
Source: PubMed

ABSTRACT

Anorexia nervosa (AN) has been associated with impulse regulation problems. This study investigated subjective and behavioural impulsivity in women with anorexia nervosa (n=15) and a control group (n=16).
A self-report measure (the impulsiveness, venturesomeness, and empathy questionnaire; I(7)) and two behavioural measures (a continuous performance task [CPT]; and a novel risk taking measure [Bets 16]) of impulsivity were used along with the Beck Depression Inventory (BDI).
The AN group had elevated BDI scores and lower self-reported impulsiveness and venturesomeness scores, but they also displayed impulsive behaviour on the CPT (more errors of commission with faster reaction times).
The coexistence, in AN, of self-reported self-control and behavioural impulsivity indicates that the relationship between impulsivity and disordered eating in AN is more complex than previously recognised and supports the view that self-awareness in AN is low.

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Available from: Georgia Butler, Jan 16, 2015
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    • "Although the BDI does not provide a clinical diagnosis of depressive disorders, nor are any Israeli norms available, Beck et al. (1988) have suggested that scores between 14 and 20 may indicate an average level of depression. These results support the majority of empirical findings, reported in the literature, of high levels of depression and anxiety among bulimic (Braun et al., 1994; Bulik, Sullivan, Carter & Joyce, 1996; Duncan et al., 2005; Gilboa-Schechtman, Avnon, Zubery & Jeczmien, 2006) and anorexic patients (Ametller, Castro, Serrano, Martinez & Toro, 2005; Butler & Montgomery, 2005; Holtkamp, Muller, Heussen, Remschmidt & Herpartz-Dahlmann, 2005; Zeeck, Hartmann, Buchholz & Herzog, 2005). As mentioned above, the BN group obtained higher scores on negative body image and impulsivity than the AN group. "

    Full-text · Dataset · Oct 2012
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    • "It is important to note that self-control and behavioral impulsivity (more errors in a continuous performance task) coexist in AN (Butler and Montgomery, 2005), indicating that the nature of the impulsive deficit in AN is multidirectional and can be explained in terms of both impulse over control increase in impulsivity. A potential importance for impulse control of other neurotransmitters , such as dopamine (Soubrie, 1986; Swann et al., 2002; Winstanley et al., 2005), further increases the complexity of impulsivity in AN. "
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    ABSTRACT: Patients with anorexia nervosa (AN) show extreme dieting weight loss, hyperactivity, depression/anxiety, self-control, and behavioral impulsivity. 5-Hydroxytryptamine (5-HT; serotonin) is involved in almost all the behavioral changes observed in AN patients. Both genetic and environmental factors contribute toward the pathogenesis of AN. It is a frequent disorder among adolescent girls and young women and starts as an attempt to lose weight to look beautiful and attractive. Failure to see the turning point when fasting becomes unreasonable leads to malnutrition and AN. Tryptophan, the precursor of serotonin and an essential amino acid, is only available in the diet. It is therefore likely that excessive diet restriction and malnutrition decrease brain serotonin stores because the precursor is less available to the rate-limiting enzyme of 5-HT biosynthesis, which normally exists unsaturated with its substrate. Evidence shows that diet restriction-induced exaggerated feedback control over 5-HT synthesis and the smaller availability of tryptophan decreases serotonin neurotransmission at postsynaptic sites, leading to hyperactivity, depression, and behavioral impulsivity. A compensatory upregulation of postsynaptic 5-HT-1A receptors and hypophagic serotonin receptors may be involved in anxiety and suppression of appetite. It is suggested that tryptophan supplementation may improve pharmacotherapy in AN.
    Full-text · Article · Sep 2012 · Behavioural pharmacology
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    • "It is important to note that self-control and behavioral impulsivity (more errors in a continuous performance task) coexist in AN (Butler and Montgomery, 2005), indicating that the nature of the impulsive deficit in AN is multidirectional and can be explained in terms of both impulse over control increase in impulsivity. A potential importance for impulse control of other neurotransmitters , such as dopamine (Soubrie, 1986; Swann et al., 2002; Winstanley et al., 2005), further increases the complexity of impulsivity in AN. "
    Dataset: review

    Full-text · Dataset · Aug 2012
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