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Flack KD, Anderson III RE, McFee KF, Day BT. Characterizing motor impulsivity of individuals classified as overweight to obese. SPORTS MEDICINE AND HEALTH SCIENCE 2023; 5:314-318. [PMID: 38314047 PMCID: PMC10831366 DOI: 10.1016/j.smhs.2023.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 08/29/2023] [Accepted: 08/31/2023] [Indexed: 02/06/2024] Open
Abstract
Deficits in the impulse control system are an important predictor of energy intake and body weight. Adults classified as overweight to obese may possess these deficits as a general behavioral trait or they may be food-specific. The present study assessed motor impulsivity (ability to suppress a pre-potent response) when presented with food and neutral (non-food) cues, testing if deficits in motor impulsivity is specific to food cues or a general trait among participants classified as overweight to obese. The proportion of inhibitory failures to no-go targets following food cues (10.8%) was significantly greater than the proportion of inhibitory failures to no-go targets following neutral cues (1.9%, p < 0.001). These differences remained when covering for sex and hunger. This indicates deficits in food-specific impulse control (as opposed to general impulse control) are present in those classified as overweight to obese. Understanding the specific aspect of impulse control that is present in this population is needed for the development of future impulse control training interventions that seek to change eating behaviors as a means for weight control.
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Affiliation(s)
- Kyle D. Flack
- Department of Dietetics and Human Nutrition, College of Agriculture, University of Kentucky, Lexington, KY, USA
| | - Robert E. Anderson III
- Department of Dietetics and Human Nutrition, College of Agriculture, University of Kentucky, Lexington, KY, USA
| | - Kylie F. McFee
- Department of Dietetics and Human Nutrition, College of Agriculture, University of Kentucky, Lexington, KY, USA
| | - Bridgette T. Day
- Department of Dietetics and Human Nutrition, College of Agriculture, University of Kentucky, Lexington, KY, USA
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McPhee MD, Hendershot CS. Meta-analysis of acute alcohol effects on response inhibition. Neurosci Biobehav Rev 2023; 152:105274. [PMID: 37277010 DOI: 10.1016/j.neubiorev.2023.105274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 05/11/2023] [Accepted: 06/02/2023] [Indexed: 06/07/2023]
Abstract
Alcohol intoxication impairs response inhibition; however, discrepant findings have been reported regarding the magnitude and moderators of this effect. This meta-analysis of human laboratory studies aimed to quantify acute effects of alcohol on response inhibition and evaluate moderators of this effect. Eligible studies examined alcohol's effects on response inhibition with the Go/No-Go (GNG) task (n = 1616 participants) or Stop Signal Task (SST) (n = 1310 participants). Results revealed a detrimental effect of acute alcohol on response inhibition overall (g = 0.411, 95 % CI [0.350, 0.471]), with similar effects in studies using GNG (g = 0.431, SE = 0.031) and SST (g = 0.366, SE = 0.063). Effect sizes were larger in studies involving higher breath alcohol concentration levels and under GNG conditions that established a prepotent response set. These findings establish the magnitude, precision, and potential moderators of alcohol's effects on inhibitory control, furthering understanding of a key neurobehavioral mechanism proposed to underlie alcohol-related impulsivity and impaired control over consumption.
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Affiliation(s)
- Matthew D McPhee
- Rotman Research Institute, Baycrest Academy for Research and Education, 3560 Bathurst Street, Toronto M6A2E1, Ontario, Canada.
| | - Christian S Hendershot
- Bowles Center for Alcohol Studies, 104 Manning Drive, Chapel Hill, NC 27599-7178, USA; Department of Psychiatry, University of North Carolina at Chapel Hill, 104 Manning Drive, Chapel Hill, NC 27599-7178, USA
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Flack KD, Anderson RE, McFee KF, Kryscio R, Rush CR. Exercise Increases Attentional Bias Towards Food Cues in Individuals Classified as Overweight to Obese. Physiol Behav 2022; 247:113711. [PMID: 35066060 PMCID: PMC8845497 DOI: 10.1016/j.physbeh.2022.113711] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 01/18/2022] [Accepted: 01/19/2022] [Indexed: 11/28/2022]
Abstract
BACKGROUND The obesity epidemic continues to be a major public health concern. Although exercise is the most common weight loss recommendation, weight loss outcomes from an exercise program are often suboptimal. The human body compensates for a large percentage of the energy expended through exercise to maintain energy homeostasis and body weight. Increases in energy intake appear to be the most impactful compensatory behavior. Research on the mechanisms driving this behavior has not been fully elucidated. PURPOSE To determine if exercise influences the attentional processing towards food cues (attentional bias) and inhibitory control for food cues among individuals classified as overweight to obese who do not exercise. METHODS Thirty adults classified as overweight to obese participated in a counterbalanced, crossover trial featuring two assessment visits on separate days separated by at least one week. Attentional bias and inhibitory control towards food cues was assessed prior to and after a bout of exercise where participants expended 500 kcal (one assessment visit) and before and after a 60 min bout of watching television (second assessment visit). Attentional bias was conceptualized as the percentage of time fixated on food cues when both food and neutral (non-food) cues were presented during a food-specific dot-probe task. Inhibitory control, specifically motor impulsivity, was assessed as percentage of inhibitory failures during a food-specific Go/NoGo task. RESULTS A significant condition by time effect was observed for attentional bias towards food cues, independent of hunger, whereas attentional bias towards food cues was increased pre-post exercise but not after watching TV. Inhibitory control was not affected by exercise or related to attentional bias for food cues. CONCLUSIONS An acute bout of exercise increased attentional bias for food cues, pointing to a mechanism that may contribute to the weight loss resistance observed with exercise. Future trials are needed to evaluate attentional bias towards food cues over a longitudinal exercise intervention.
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Affiliation(s)
- Kyle D Flack
- Department of Dietetics and Human Nutrition, College of Agriculture, University of Kentucky, Lexington, KY United States.
| | - Robert E Anderson
- Department of Dietetics and Human Nutrition, College of Agriculture, University of Kentucky, Lexington, KY United States
| | - Kylie F McFee
- Department of Dietetics and Human Nutrition, College of Agriculture, University of Kentucky, Lexington, KY United States.
| | - Richard Kryscio
- Department of Statistics, University of Kentucky, Lexington, KY United States
| | - Craig R Rush
- Department of Behavioral Sciences, College of Medicine, University of Kentucky, Lexington, KY United States; Department of Psychiatry, College of Medicine, University of Kentucky, Lexington, KY United States; Department of Psychology, College of Arts and Sciences, University of Kentucky, Lexington, KY United States
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Alcorn JL, Strickland JC, Lile JA, Stoops WW, Rush CR. Acute methylphenidate administration reduces cocaine-cue attentional bias. Prog Neuropsychopharmacol Biol Psychiatry 2020; 103:109974. [PMID: 32454161 DOI: 10.1016/j.pnpbp.2020.109974] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 03/23/2020] [Accepted: 05/19/2020] [Indexed: 11/30/2022]
Abstract
Mechanistic research on behavioral processes underlying substance use disorder might help identify novel targets for interventions development. Drug-related attentional bias and response inhibition deficits have received a great deal of consideration in substance use research, broadly, and cocaine use research, specifically. Studies investigating pharmacological mechanisms that may ameliorate, or further impair, these behaviors relevant to cocaine use are relatively lacking. This study evaluated the impact of acute administration of methylphenidate, a dopamine-favoring reuptake inhibitor, on both gaze-related cocaine-cue-attentional bias and cocaine-cue related disruptions in response inhibition among individuals with cocaine use disorder. Participants (N = 12; 33% female) completed a within-subject, outpatient, acute dosing study. Two sessions were completed in which methylphenidate (60 mg) or placebo were administered followed by completion of an attentional bias task using eye-tracking technology and neutral-cue and cocaine-cue response inhibition tasks. Subjective and physiological effects were also recorded. Significant cocaine cue attentional bias and response inhibition failures were observed during placebo administration. Acute methylphenidate administration reduced cocaine-cue attentional bias as measured by cocaine-cue gaze fixations (dz = 1.04; Bayes Factor = 12.37). No statistically significant effects of methylphenidate were observed on response inhibition (Bayes Factors = 0.17-1.04). Methylphenidate produced prototypical subjective and physiological effects. Although the small sample should be considered, these findings indicate acute manipulation of dopaminergic activity reduced cue-related attentional allocation related to cocaine use disorder. Future research evaluating alternative dopaminergic agents and applications within a clinical setting are needed to determine the clinical significance of targeting this neurobehavioral mechanism.
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Affiliation(s)
- Joseph L Alcorn
- Department of Behavioral Science, University of Kentucky College of Medicine, 1110 Veterans Drive, Medical Behavioral Science Building Room 140, Lexington, KY 40536-0086, USA
| | - Justin C Strickland
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, 5510 Nathan Shock Drive, Baltimore, MD 21224, USA
| | - Joshua A Lile
- Department of Behavioral Science, University of Kentucky College of Medicine, 1110 Veterans Drive, Medical Behavioral Science Building Room 140, Lexington, KY 40536-0086, USA; Department of Psychology, University of Kentucky College of Arts and Sciences, 110 Kastle Hall, Lexington, KY 40506-0044, USA; Department of Psychiatry, University of Kentucky College of Medicine, 245 Fountain Court, Lexington, KY 40509-1810, USA
| | - William W Stoops
- Department of Behavioral Science, University of Kentucky College of Medicine, 1110 Veterans Drive, Medical Behavioral Science Building Room 140, Lexington, KY 40536-0086, USA; Department of Psychology, University of Kentucky College of Arts and Sciences, 110 Kastle Hall, Lexington, KY 40506-0044, USA; Department of Psychiatry, University of Kentucky College of Medicine, 245 Fountain Court, Lexington, KY 40509-1810, USA; Center on Drug and Alcohol Research, University of Kentucky College of Medicine, 845 Angliana Ave, Lexington, KY 40508, USA
| | - Craig R Rush
- Department of Behavioral Science, University of Kentucky College of Medicine, 1110 Veterans Drive, Medical Behavioral Science Building Room 140, Lexington, KY 40536-0086, USA; Department of Psychology, University of Kentucky College of Arts and Sciences, 110 Kastle Hall, Lexington, KY 40506-0044, USA; Department of Psychiatry, University of Kentucky College of Medicine, 245 Fountain Court, Lexington, KY 40509-1810, USA.
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Rush CR, Strickland JC, Pike E, Studts CR, Stoops WW. Inhibitory-control training for cocaine use disorder and contingency management for clinic attendance: A randomized pilot study of feasibility, acceptability and initial efficacy. Drug Alcohol Depend 2019; 207:107803. [PMID: 31864166 PMCID: PMC6953399 DOI: 10.1016/j.drugalcdep.2019.107803] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 11/29/2019] [Accepted: 12/07/2019] [Indexed: 10/25/2022]
Abstract
BACKGROUND Cocaine abusers have impaired inhibitory Cocaine use is associated with impaired inhibitory control. This study determined the feasibility, acceptability, and initial efficacy of inhibitory-control training to cocaine or neutral images in cocaine use disorder patients. METHODS Participants were randomly assigned to inhibitory-control training to cocaine (N = 20) or neutral (N = 20) images. Feasibility was assessed by percent of patients eligible for participation after a behavioral qualification session, time-to-target enrollment, percent of clinic visits attended, percent of participants who completed 80 % or more training sessions, and percent of follow-up visits attended. Acceptability was determined using a Treatment Acceptability Questionnaire. Initial efficacy was determined during training and a follow-up phase with urine samples tested qualitatively and quantitatively for cocaine. Participants in both conditions received monetary incentives delivered on an escalating schedule for clinic attendance. RESULTS The groups were well matched and no differences on demographic or substance use variables were observed. Attendance was stable during the treatment period with high overall attendance in both groups (average sessions attended: cocaine image group = 97 %; neutral image group = 90 %). No group differences were observed in the percentage of follow-up sessions attended (95 % for the cocaine-image group; 88 % of neutral-image group). Ratings on the Treatment Acceptability Questionnaire were high (i.e., mean scores ≥ 80 for all items rated on 101-unit visual analog scales). Participants in the cocaine- and neutral-image conditions did not differ significantly in terms of cocaine use during the training nor follow-up phase. Inhibitory-control training improved stop signal performance but not delay discounting. CONCLUSION The procedures were feasible and acceptable. Inhibitory-control training to cocaine images did not reduce cocaine use relative to the neutral image training condition. The inability to detect significant differences in cocaine use across the groups is not surprising given the small sample size. More research is needed to determine the utility of inhibitory-control training for cocaine use disorder. Future trials should determine whether inhibitory-control training to cocaine images augments the efficacy of other behavioral interventions.
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Affiliation(s)
- Craig R. Rush
- Department of Behavioral Science, University of Kentucky, College of Medicine, 1100 Veterans Drive, Medical Behavioral Science Building Room 140, Lexington, KY 40536, USA,Department of Psychology, University of Kentucky, College of Arts and Sciences, 171 Funkhouser Drive, Lexington, KY 40506, USA,Department of Psychiatry, University of Kentuck,y College of Medicine, 3470 Blazer Parkway, Lexington, KY 40509, USA,Correspondence concerning this article should be addressed to: Craig R. Rush, PhD, Medical Behavioral Science Building, Lexington, KY 40536-0086, , Phone: 859-323-6130, Facsimile: 859-257-7684s
| | - Justin C. Strickland
- Department of Psychology, University of Kentucky, College of Arts and Sciences, 171 Funkhouser Drive, Lexington, KY 40506, USA
| | - Erika Pike
- Department of Behavioral Science, University of Kentucky, College of Medicine, 1100 Veterans Drive, Medical Behavioral Science Building Room 140, Lexington, KY 40536, USA
| | - Christina R. Studts
- Department of Health, Behavior & Society, College of Public Health, University of Kentucky, Lexington, KY USA
| | - William W. Stoops
- Department of Behavioral Science, University of Kentucky, College of Medicine, 1100 Veterans Drive, Medical Behavioral Science Building Room 140, Lexington, KY 40536, USA,Department of Psychology, University of Kentucky, College of Arts and Sciences, 171 Funkhouser Drive, Lexington, KY 40506, USA,Department of Psychiatry, University of Kentuck,y College of Medicine, 3470 Blazer Parkway, Lexington, KY 40509, USA,Center on Drug and Alcohol Research, University of Kentucky College of Medicine, 845 Angliana Ave, Lexington, KY 40508, USA
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