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Zakers A, Cimolai V. Complementary and Integrative Medicine and Eating Disorders in Youth: Traditional Yoga, Virtual Reality, Light Therapy, Neurofeedback, Acupuncture, Energy Psychology Techniques, Art Therapies, and Spirituality. Child Adolesc Psychiatr Clin N Am 2023; 32:421-450. [PMID: 37147045 DOI: 10.1016/j.chc.2022.08.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Eating disorders (EDs) are a non-heterogeneous group of illnesses with significant physical and mental comorbidity and mortality associated with maladaptive coping. With the exception of lisdexamfetamine (Vyvanse) for binge eating disorder, no medications have been effective for the core symptoms of ED. ED requires a multimodal approach. Complementary and integrative medicine (CIM) can be helpful as an adjunct. The most promising CIM interventions are traditional yoga, virtual reality, eye movement desensitization and reprocessing, Music Therapy, and biofeedback/neurofeedback.
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Affiliation(s)
- Aleema Zakers
- MPH Georgia Institute of Technology, Moorhouse School of Medicine, Emory School of Medicine, 750 Ferst Drive, Atlanta, GA 30332, USA.
| | - Valentina Cimolai
- Private Practice, Bloom Psychiatry and Wellness and Mindful Healing Group, 1245 Court Street, Clearwater, FL 33756, USA
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Berchio C, Cambi S, Pappaianni E, Micali N. EEG Biomarkers in Children and Adolescents With Feeding and Eating Disorders: Current Evidence and Future Directions. Front Psychiatry 2022; 13:882358. [PMID: 35463489 PMCID: PMC9026170 DOI: 10.3389/fpsyt.2022.882358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 03/15/2022] [Indexed: 11/21/2022] Open
Abstract
INTRODUCTION Electroencephalography (EEG) represents a powerful tool to detect abnormal neural dynamics in child and adolescent psychiatry. Feeding and Eating Disorders (FEDs), such as anorexia nervosa (AN), bulimia nervosa (BN), binge eating disorder (BED), and avoidant restrictive food intake disorder (ARFID) onset in childhood and adolescence. EEG has rarely been used to examine cortical brain activity in children and adolescents with FEDs. This review aims to summarize EEG findings in FEDs amongst children and adolescents, and to highlight areas deserving further research. METHODS We searched the literature for EEG studies on children and adolescents with FEDs using Google Scholar, PsycINFO, Medline, and PubMed. RESULTS Twelve studies were identified, the majority focusing on AN (N = 10). The identified studies suggest reduced action monitoring control (preparatory waves, N200, P300), specific perceptual-cognitive styles to body/face perception (late positive potentials/early posterior negativity), as well as fundamental changes in posterior theta oscillations in AN. Behavioral traits of BN/BED (i.e., loss of control eating, emotional eating), and AN seem to be associated with an increased attentional reactivity (P300) to visual food stimuli. CONCLUSION Electroencephalography research in children and adolescents with FEDs is limited and mostly focused on AN. While EEG abnormalities seem consistent with a reduced top-down control and attentional allocation deficits in AN, altered attention specific to food cues emerges across FEDs. Overcoming conventional EEG analyses, and investigating spatial properties (i.e., electrical neuroimaging), will enhance our understanding of FEDs neurobiology.
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Affiliation(s)
- Cristina Berchio
- Department of Psychiatry, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Susanne Cambi
- Department of Psychiatry, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Edoardo Pappaianni
- Department of Psychiatry, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Nadia Micali
- Department of Psychiatry, Faculty of Medicine, University of Geneva, Geneva, Switzerland.,Division of Child and Adolescent Psychiatry, Department of Child and Adolescent Health, Geneva University Hospitals, Geneva, Switzerland.,Great Ormond Street Institute of Child Health, University College London, London, United Kingdom
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Alfano V, Mele G, Cotugno A, Longarzo M. Multimodal neuroimaging in anorexia nervosa. J Neurosci Res 2020; 98:2178-2207. [PMID: 32770570 DOI: 10.1002/jnr.24674] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 02/26/2020] [Accepted: 05/25/2020] [Indexed: 12/13/2022]
Abstract
Anorexia nervosa (AN) is a severe and complex psychiatric disorder characterized by intense fear about weight gain and finalized to food-related control behaviors. Growing interest has been demonstrated about neurobiological processes subtend to AN physiopathology. The present review aimed to collect neurostructural and neurofunctional available data from 2010 to 2019. Results have been organized according to the neuroimaging technique employed, also including a specific section on electroencephalographic results, mostly neglected in previous reviews. Diffuse cerebral vulnerability has been demonstrated and the contribution of several structures has been identified. Insula, cingulate cortex, parietal and frontal areas are primarily involved both by structural and functional perspectives. Moreover, consistent alterations in white matter integrity and brain electrical activity have been reported. Neuroimaging findings give a substantial contribution to AN pathophysiological description, also in order to understand altered but reversible processes in the passage from acute illness phase to disorder's remission, useful also for defining therapy.
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Abstract
BACKGROUND Eating disorders are a significant cause of morbidity and mortality. The etiology and maintenance of eating-disorder symptoms are not well understood. Evidence suggests that there may be gustatory alterations in patients with eating disorders. OBJECTIVE This article systematically reviews research assessing gustatory differences in patients with anorexia nervosa (AN), bulimia nervosa (BN), and binge eating disorder (BED). METHOD A systematic review was performed, following Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, examining taste and eating disorders. We reviewed electronic databases and identified 1,490 peer-reviewed English-language studies. Of these, 49 met inclusion criteria. RESULTS Studies employed psychophysical measures (n = 27), self-reported questionnaires (n = 5), and neuroimaging techniques (i.e., electroencephalography, functional magnetic resonance imaging; n = 17). Psychophysical studies showed that individuals with BN, in general, had greater preference for sweetness than healthy controls, and those with AN had a greater aversion for fat than controls. In neuroimaging studies, findings suggested that predictable administration of sweet-taste stimuli was associated with reduced activation in taste-reward regions of the brain among individuals with AN (e.g., insula, ventral, and dorsal striatum) but increased activation in BN and BED. DISCUSSION To our knowledge, this systematic review is the first to synthesize literature on taste differences in AN, BN, and BED. The inconsistency and variability in methods used across studies increased difficulties in comparing studies and disease processes. Further studies with well-defined population parameters are warranted to better understand how taste varies in patients with eating disorders.
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Affiliation(s)
- Ariana M. Chao
- Department of Biobehavioral Health Sciences, The University of Pennsylvania School of Nursing, Philadelphia, PA, USA
- Center for Weight and Eating Disorders, Department of Psychiatry, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Abhrarup Roy
- Sensory Science & Metabolism Unit, Biobehavioral Branch, Division of Intramural Research, Department of Health and Human Services, National Institutes of Health, Bethesda, MD, USA
| | - Alexis T. Franks
- Sensory Science & Metabolism Unit, Biobehavioral Branch, Division of Intramural Research, Department of Health and Human Services, National Institutes of Health, Bethesda, MD, USA
| | - Paule V. Joseph
- Sensory Science & Metabolism Unit, Biobehavioral Branch, Division of Intramural Research, Department of Health and Human Services, National Institutes of Health, Bethesda, MD, USA
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Kot E, Kucharska K, Monteleone AM, Monteleone P. Structural and functional brain correlates of altered taste processing in anorexia nervosa: A systematic review. EUROPEAN EATING DISORDERS REVIEW 2019; 28:122-140. [DOI: 10.1002/erv.2713] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 08/30/2019] [Accepted: 11/05/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Emilia Kot
- Faculty of PsychologyUniversity of Warsaw Warsaw Poland
| | | | | | - Palmiero Monteleone
- Department of PsychiatryUniversity of Campania “Luigi Vanvitelli” Naples Italy
- Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, Section of NeurosciencesUniversity of Salerno Salerno Italy
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Songsamoe S, Saengwong-ngam R, Koomhin P, Matan N. Understanding consumer physiological and emotional responses to food products using electroencephalography (EEG). Trends Food Sci Technol 2019. [DOI: 10.1016/j.tifs.2019.09.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Kinnaird E, Stewart C, Tchanturia K. Taste sensitivity in anorexia nervosa: A systematic review. Int J Eat Disord 2018; 51:771-784. [PMID: 29984498 PMCID: PMC6282513 DOI: 10.1002/eat.22886] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 03/27/2018] [Accepted: 04/22/2018] [Indexed: 01/22/2023]
Abstract
OBJECTIVE There is evidence for altered processing of taste in anorexia nervosa, particularly in the areas of reward processing and hedonic sensitivity. However, research on whether people with anorexia nervosa identify taste stimuli accurately, known as taste sensitivity, has yielded mixed findings. The objective of this study was to synthesize the literature on taste sensitivity in this disorder to provide a basis for future discussion on whether altered taste sensitivity may be also implicated in wider atypical taste processing in anorexia. METHOD Electronic databases were searched systematically to identify published research examining taste sensitivity in anorexia. Search terms were "anorexia nervosa", or "eating disorder", combined with "taste". 18 studies met inclusion criteria. RESULTS The review of the findings suggest that individuals with AN may experience reduced taste sensitivity that may improve following recovery. However, there was a significant variability in results across studies, potentially reflecting methodological problems including low sample sizes, experimental designs, and uncontrolled confounding variables. DISCUSSION This review suggests that altered taste sensitivity could represent a component in the wider altered taste processing observed in anorexia nervosa. However, the heterogeneity of findings highlight the need for future research to consider methodological issues raised by this review.
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Affiliation(s)
- Emma Kinnaird
- Department of Psychological MedicineInstitute of Psychiatry, Psychology and Neuroscience, King's College LondonLondonUnited Kingdom
| | - Catherine Stewart
- Department of Psychological MedicineInstitute of Psychiatry, Psychology and Neuroscience, King's College LondonLondonUnited Kingdom,South London and Maudsley NHS Foundation TrustLondonUnited Kingdom
| | - Kate Tchanturia
- Department of Psychological MedicineInstitute of Psychiatry, Psychology and Neuroscience, King's College LondonLondonUnited Kingdom,South London and Maudsley NHS Foundation TrustLondonUnited Kingdom,Illia State UniversityTbilisiGeorgia
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Lackner N, Unterrainer HF, Skliris D, Shaheen S, Dunitz-Scheer M, Wood G, Scheer PJZ, Wallner-Liebmann SJ, Neuper C. EEG neurofeedback effects in the treatment of adolescent anorexia nervosa. Eat Disord 2016; 24:354-74. [PMID: 27027700 DOI: 10.1080/10640266.2016.1160705] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
A pre-post design including 22 females was used to evaluate the effectiveness of neurofeedback in the treatment of adolescent anorexia nervosa. Resting EEG measures and a psychological test-battery assessing eating behavior traits, clinical symptoms, emotionality, and mood were obtained. While both the experimental (n = 10) and control group (n = 12) received their usual maintenance treatment, the experimental group received 10 sessions of individual alpha frequency training over a period of 5 weeks as additional treatment. Significant training effects were shown in eating behavior traits, emotion regulation, and in relative theta power in the eyes closed condition. Although the results are limited due to the small sample size, these are the first empirical data demonstrating the benefits of neurofeedback as a treatment adjunct in individuals with anorexia nervosa.
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Affiliation(s)
- Nina Lackner
- a Department of Neuropsychology , Karl-Franzens University Graz , Graz , Austria.,b Department of Psychiatry , Medical University Graz , Graz , Austria
| | - Human-Friedrich Unterrainer
- b Department of Psychiatry , Medical University Graz , Graz , Austria.,c Center for Integrative Addiction Research (CIAR), Grüner Kreis Society , Vienna , Austria
| | - Dimitris Skliris
- a Department of Neuropsychology , Karl-Franzens University Graz , Graz , Austria
| | - Sandra Shaheen
- d Department of Psychiatry , Harvard University Medical School , Boston , Massachusetts , USA
| | - Marguerite Dunitz-Scheer
- e Psychosomatic & Psychotherapeutic Unit, Department for General Pediatrics , Medical University Graz , Graz , Austria
| | - Guilherme Wood
- a Department of Neuropsychology , Karl-Franzens University Graz , Graz , Austria
| | - Peter Jaron Zwi Scheer
- e Psychosomatic & Psychotherapeutic Unit, Department for General Pediatrics , Medical University Graz , Graz , Austria
| | | | - Christa Neuper
- a Department of Neuropsychology , Karl-Franzens University Graz , Graz , Austria
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Hestad KA, Weider S, Nilsen KB, Indredavik MS, Sand T. Increased frontal electroencephalogram theta amplitude in patients with anorexia nervosa compared to healthy controls. Neuropsychiatr Dis Treat 2016; 12:2419-2423. [PMID: 27703359 PMCID: PMC5036600 DOI: 10.2147/ndt.s113586] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE To conduct a blind study of quantitative electroencephalogram-band amplitudes in patients with anorexia nervosa (AN) and healthy controls. METHODS Twenty-one patients with AN and 24 controls were examined with eyes-closed 16-channel electroencephalogram. Main variables were absolute alpha, theta, and delta amplitudes in frontal, temporal, and posterior regions. RESULTS There were no significant differences between the AN patients and controls regarding absolute regional band amplitudes in μV. Borderline significance was found for anterior theta (P=0.051). Significantly increased left and right frontal electrode theta amplitude was found in AN patients (F3, P=0.014; F4, P=0.038) compared to controls. Significant differences were also observed for secondary variables: lower values for relative parietooccipital delta and frontocentral alpha activity among AN patients than among controls. CONCLUSION We observed slight excess frontal theta and lower relative alpha and delta amplitudes among AN patients than among controls. This pattern is possibly related to a slight frontal lobe dysfunction in AN, or it may reflect increased attention/vigilance or another state-related change in patients with AN compared to healthy controls.
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Affiliation(s)
- Knut A Hestad
- Department of Research, Innlandet Hospital Trust, Brumunddal, Norway; Department of Public Health, Hedmark University of Applied Sciences, Elverum, Norway; Department of Psychology, Faculty of Social Sciences and Technology Management, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - Siri Weider
- Department of Psychology, Faculty of Social Sciences and Technology Management, Norwegian University of Science and Technology (NTNU), Trondheim, Norway; Department of Psychiatry, Specialised Unit for Eating Disorder Patients, Levanger Hospital, Health Trust Nord-Trøndelag, Levanger, Norway
| | - Kristian Bernhard Nilsen
- Department of Neuroscience, Norwegian University of Science and Technology (NTNU), Trondheim, Norway; Department of Work Psychology and Physiology, National Institute of Occupational Health, Oslo, Norway; Department of Neurology, Section for Clinical Neurophysiology, Oslo University Hospital, Ullevål, Oslo, Norway
| | - Marit Sæbø Indredavik
- Regional Centre for Child and Youth Mental Health and Child Welfare, Faculty of Medicine, Norwegian University of Science and Technology (NTNU), Trondheim, Norway; Department of Child and Adolescent Psychiatry, St Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
| | - Trond Sand
- Department of Neurology, Section for Clinical Neurophysiology, Oslo University Hospital, Ullevål, Oslo, Norway; Department of Neurology and Clinical Neurophysiology, St Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
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Abstract
Clinical applications of electroencephalography (EEG) are used with different objectives, EEG being a noninvasive and painless procedure. In respect of eating disorders, in the 1950s a new line of study about the neurological bases of anorexia nervosa was started and has since been developed. The purpose of this review is to update the existing literature data on the main findings in respect of EEG in eating disorders by means of a search conducted in PubMed. Despite the fact that weight gain tends to normalize some brain dysfunctions assessed by means of EEG, the specific effect of gaining weight remains controversial. Different studies have reported that cortical dysfunctions can be found in patients with anorexia nervosa even after weight gain, whereas others have reported a normalization of EEG in respect of the initial reduced alpha/ increased beta power in those patients with refeeding. Findings of studies that have analyzed the possible relationship between eating disorders and depression, based on sleep EEG disturbances, do not support the idea of eating disorders as a variant of depression or affective disorders. Some EEG findings are very consistent with previous neuroimaging results on patients with anorexia nervosa, reporting neural disturbances in response to stimuli that are relevant to the pathology (eg, stimuli like food exposure, different emotional situations, or body images).
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Park RJ, Dunn BD, Barnard PJ. Schematic Models and Modes of Mind in Anorexia Nervosa I: A Novel Process Account. Int J Cogn Ther 2011. [DOI: 10.1521/ijct.2011.4.4.415] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Franken IH, Huijding J, Nijs IM, van Strien JW. Electrophysiology of appetitive taste and appetitive taste conditioning in humans. Biol Psychol 2011; 86:273-8. [DOI: 10.1016/j.biopsycho.2010.12.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Revised: 11/23/2010] [Accepted: 12/19/2010] [Indexed: 10/18/2022]
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Hatch A, Madden S, Kohn MR, Clarke S, Touyz S, Gordon E, Williams LM. EEG in adolescent anorexia nervosa: impact of refeeding and weight gain. Int J Eat Disord 2011; 44:65-75. [PMID: 20063377 DOI: 10.1002/eat.20777] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE To examine resting awake EEG in adolescent AN participants before and after refeeding to determine if EEG abnormalities in Anorexia Nervosa (AN) are reversible. METHOD In 37 adolescent first admission AN patients and 45 healthy controls, EEG was recorded during short duration "eyes open" and "eyes closed" awake resting conditions. Repeat testing occurred in 28 AN participants after refeeding and subsequent weight gain. RESULTS In "eyes open," underweight AN participants exhibit reduced relative alpha power and increased beta power in frontal brain regions. A significant increase in alpha, and decrease in beta and delta power was observed within participants after refeeding. In "eyes closed", underweight AN participants had elevated theta in parietal-occipital regions which remained after refeeding. DISCUSSION EEG abnormalities (reduced alpha/increased beta power) in AN normalizes with refeeding, while increased theta power persists in parietal-occipital regions in an eyes closed context.
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Affiliation(s)
- Ainslie Hatch
- The Brain Dynamics Centre, Westmead Millennium Institute and University of Sydney, Westmead Hospital, Westmead, Sydney, New South Wales 2145, Australia.
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Szalay C, Abrahám I, Papp S, Takács G, Lukáts B, Gáti A, Karádi Z. Taste reactivity deficit in anorexia nervosa. Psychiatry Clin Neurosci 2010; 64:403-7. [PMID: 20546167 DOI: 10.1111/j.1440-1819.2010.02106.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIM Anorexia nervosa is a complex psychiatric disorder posing a rapidly increasing burden on modern societies. Our purpose was to clarify perceptual-motivational aspects of gustatory disturbances in the disease. METHODS A taste reactivity test, with the use of all five primary qualities in two concentrations, was performed in restrictive-type anorexic patients, and their hedonic evaluations were compared to those of age-matched healthy control subjects. RESULTS The patients gave significantly lower pleasantness scores for pleasant taste stimuli compared with controls. The differences were the greatest for the lower concentration sucrose, umami and sodium chloride. Ratings given for the aversive taste stimuli were similar in both experimental groups. CONCLUSION Our findings contribute to a better understanding of complex symptoms of anorexia nervosa, and may also help to develop more effective cognitive-behavioral therapies.
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Affiliation(s)
- Csaba Szalay
- Institute of Physiology and Neurophysiology Research Group of the Hungarian Academy of Sciences, Pécs University Medical School, Pécs, Hungary.
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Klein DA, Schebendach JE, Gershkovich M, Smith GP, Walsh BT. Modified sham feeding of sweet solutions in women with anorexia nervosa. Physiol Behav 2010; 101:132-40. [PMID: 20438741 DOI: 10.1016/j.physbeh.2010.04.030] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2009] [Revised: 04/26/2010] [Accepted: 04/27/2010] [Indexed: 10/19/2022]
Abstract
Anorexia Nervosa (AN) is a disorder of self-starvation characterized by decreased meal size and food intake. While it is possible that reduced food intake in AN reflects an excess of inhibitory factors, e.g., cognitive inhibition related to fear of weight gain or abnormal postingestive negative feedback, it is also possible that decreased intake reflects diminished orosensory stimulation of food intake. This has been difficult to test directly because the amount of food ingested during a test meal by patients with AN reflects an integration of orosensory excitatory, and cognitive, learned, and postingestive inhibitory controls of eating. To begin to dissociate these controls, we adapted the modified sham feeding technique (MSF) to measure the intake of a series of sweetened solutions in the absence of postingestive stimulation. Subjects with AN (n=24) and normal controls (NC, n=10) were randomly presented with cherry Kool Aid solutions sweetened with five concentrations of aspartame (0, 0.01, 0.03, 0.08 and 0.28%) in a closed opaque container fitted with a straw. They were instructed to sip as much as they wanted of the solution during 15 1-minute trials and to spit the fluid out into another opaque container. Subjects with AN sipped less unsweetened solution than NC (p<0.05). Because this difference appeared to account completely for the smaller intakes of sweetened solutions by AN, responsiveness of intake to sweet taste per se was not different in AN and NC. Since MSF eliminated postingestive and presumably cognitive inhibitory controls, and the orosensory response to sweet taste was not different in AN than NC, we conclude that decreased intake by AN subjects under these conditions reflects the increased inhibition characteristic of this disorder that is presumably learned, with a possible contribution of decreased potency of orosensory stimulation by the sipped solutions.
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Affiliation(s)
- D A Klein
- Department of Psychiatry, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA.
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Nonlinear Dynamical Analysis of the Effect by Six Stimuli on Electroencephalogram. J Clin Neurophysiol 2009; 26:24-38. [DOI: 10.1097/wnp.0b013e31819862db] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Járdánházy A, Járdánházy T. Non-linear quantitative electroencephalographic (qEEG) changes during processing of chemo-sensory stimulations: a preliminary study. Behav Brain Res 2008; 194:162-8. [PMID: 18672006 DOI: 10.1016/j.bbr.2008.06.036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2008] [Revised: 06/27/2008] [Accepted: 06/30/2008] [Indexed: 10/21/2022]
Abstract
The present study was to investigate the processing of pleasant smell and taste stimuli by non-linear EEG measures. Point correlation dimension (PD2i) has been used for studying the local, and synchronization likelihood (SL) the global dynamical organization. Nine healthy subjects participated in this study. After a baseline period of 30s the patients were given a perfume cap or a chocolate taste for 30s. The analysis was performed off-line on 16 channels. After smell stimulation an immediate bilateral but short response was seen. First a decrease and afterwards an increase were found in the mean PD2i. In contrast, the taste stimulation resulted in a later reaction mainly on the right side. The SL in the slow alpha band decreased during the first 15s after both stimulations. In the second 15s, however, a remarkable SL increase was seen mainly in the 7-14Hz and in every frequency band. The decreased mean PD2i and SL values could be interpreted by the simplified network preparation to cognitive data processing. The PD2i and SL methods detected subtle dynamical changes during olfactory and gustatory processes suitable for collection normative database to pathological conditions.
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Affiliation(s)
- Anett Járdánházy
- Department of Neurology, University of Szeged, Semmelweis u. 6. V/514, H-6725 Szeged, Hungary
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Aschenbrenner K, Scholze N, Joraschky P, Hummel T. Gustatory and olfactory sensitivity in patients with anorexia and bulimia in the course of treatment. J Psychiatr Res 2008; 43:129-37. [PMID: 18423668 DOI: 10.1016/j.jpsychires.2008.03.003] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2007] [Revised: 02/26/2008] [Accepted: 03/04/2008] [Indexed: 10/22/2022]
Abstract
BACKGROUND The majority of studies on taste and smell in eating disorders have revealed several alterations of olfactory or gustatory functions. Aim of this prospective study was to employ detailed olfactory and gustatory testing in female subjects of three homogenous groups - anorexia nervosa, bulimia nervosa and healthy controls - and to look at the effects of treatment on these measures. METHODS Sixteen hospitalized female patients with anorexia (restricting type, mean age [M]=24.5 years), 24 female patients with bulimia (purging type, M=24.3 years) as well as 23 healthy controls (M=24.5 years) received olfactory ("Sniffin' Sticks") and gustatory testing ("Taste Strips"). Group differences in olfactory and gustatory sensitivity, body mass index (BMI), the Beck depression inventory, the eating attitudes test (EAT), and the influence of therapy on gustatory and olfactory function were investigated. RESULTS (1) Group differences were present for odor discrimination and overall olfactory function with anorexic patients having the lowest scores. (2) Regarding taste function, controls scored higher than patients with anorexia. (3) At admission small but significant correlations were found between overall olfactory function and body weight (r(63)=0.35), BMI (r(63) = 0.37), and EAT score (r(63) = -0.27). Similarly, (4) the taste test score correlated significantly with body weight (r(63)= 0.48), and BMI (r(63) = 0.45). Finally, (5) at discharge overall olfactory and gustatory function were significantly higher compared to admission in anorexic patients. CONCLUSIONS As compared to healthy controls and bulimic patients our results show lowered olfactory and gustatory sensitivities in anorexic patients that improved with increasing BMI and decreasing eating pathology in the course of treatment.
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Affiliation(s)
- Katja Aschenbrenner
- Department for Psychosomatic Medicine, University of Dresden Medical School, Fetscherstrasse 74, 01307 Dresden, Germany.
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Rodriguez G, Babiloni C, Brugnolo A, Del Percio C, Cerro F, Gabrielli F, Girtler N, Nobili F, Murialdo G, Rossini PM, Rossi DS, Baruzzi C, Ferro AM. Cortical sources of awake scalp EEG in eating disorders. Clin Neurophysiol 2007; 118:1213-22. [PMID: 17452006 DOI: 10.1016/j.clinph.2007.02.022] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2006] [Revised: 02/02/2007] [Accepted: 02/07/2007] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To investigate quantitative EEG (qEEG) in anorexia nervosa (AN) and bulimia nervosa (BN) in comparison with healthy controls. METHODS Resting EEG was recorded in 30 healthy females (age: 27.1+/-5.5), 16-AN females (age: 26.4+/-9.5) and 12-BN females (age: 27.0+/-6.3). Cortical EEG sources (delta, theta, alpha 1, alpha 2, beta 1, beta 2) were modeled by LORETA solutions. The statistical analysis was performed considering the factors Group, power Band, and region of interest (central, frontal, parietal, occipital, temporal, limbic). RESULTS Alpha 1 sources in central, parietal, occipital and limbic areas showed a greater amplitude in Controls versus AN and BN groups. Alpha 2 sources in parietal, occipital and limbic areas showed a greater amplitude in Controls than in both AN and BN groups. Alpha 1 sources in temporal area showed a greater amplitude in Controls compared to both the BN and AN groups as well as in the BN group compared to AN group. Central alpha 1 source correlated significantly with BMI in patients. CONCLUSIONS These results support the hypothesis that eating disorders are related to altered mechanisms of cortical neural synchronization, especially in rolandic alpha rhythms. SIGNIFICANCE To our knowledge this is the first study by LORETA able to detect modifications of cortical EEG activity in eating disorders.
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Affiliation(s)
- Guido Rodriguez
- Section of Clinical Neurophysiology (DISEM), Department of Endocrinological and Metabolic Sciences, University of Genoa, Genoa, Italy.
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Current awareness in flavour and fragrance. FLAVOUR FRAG J 2005. [DOI: 10.1002/ffj.1533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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