Handedness differences in body image distortion and eating disorder symptomatology

Christman, Stephen D.; Bentle, Michelle; Niebauer, Christopher L.

doi:10.1002/eat.20357

Cited by 43 publications

(27 citation statements)

References 55 publications

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“…This framework is reinforced by evidence that patients with PTSD have smaller corpus callosa (Kitayama et al, 2007;Villareal et al, 2004). Moreover, strong-handedness is also associated with both smaller corpus callosum size (Clarke & Zaidel, 1994;Denenberg, Kertesz, & Cowell, 1991;Habib et al1991;Witelson & Goldsmith, 1991) and decreased interaction between cognitive processes known to be functionally lateralized to opposite hemispheres (Christman, 1993(Christman, , 2001Christman, Bentle, & Niebauer, 2007 ;Christman, Geers, Kosbab, & Weiland, 2006;Jasper & Christman, 2005;Niebauer, Aselage, & Schutte, 2002 ).…”

Section: Theoretical Considerations and Future Directionsmentioning

confidence: 99%

Interhemispheric Interaction and Saccadic Horizontal Eye MovementsImplications for Episodic Memory, EMDR, and PTSD

Propper¹,

Christman²

2008

J EMDR Prac Res

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The growing body of literature on the effects of bilateral saccadic eye movements, patterned after those employed in eye movement desensitization and reprocessing (EMDR), on memory is reviewed. Research indicates that engaging in bilateral saccadic eye movements prior to lab-based memory testing results in significant improvement in episodic memory across a wide range of memory tests. Other effects of these types of eye movements on hemispheric activation and emotional state are also discussed. The findings are interpreted within a framework suggesting that bilateral saccadic eye movements, such as those employed in EMDR, increase interaction between the left and right cerebral hemispheres. This framework is also used to explain the effects of such eye movements on memory during EMDR treatment of posttraumatic stress disorder.

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Section: Theoretical Considerations and Future Directionsmentioning

confidence: 99%

Interhemispheric Interaction and Saccadic Horizontal Eye MovementsImplications for Episodic Memory, EMDR, and PTSD

Propper¹,

Christman²

2008

J EMDR Prac Res

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“…For instance, IH reported feeling a sensory illusion more so than CH (Niebauer et al, 2002). IH are also more able to update perceptions of an ambiguous image (Christman, Sontam, & Jasper, 2009) and display fewer differences between their perceived and actual body image (Christman, Bentle, & Niebauer, 2007).…”

mentioning

confidence: 98%

Handedness predicts motivation to switch from the status quo

Westfall

Corser

Jasper

2014

Laterality: Asymmetries of Body, Brain and Cognition

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Degree of handedness is a correlate of structural brain asymmetries and predicts individual differences in episodic memory, belief updating and various biases in decision-making. We examined whether handedness moderated the status quo bias given previous research suggests that both constructs are related to loss aversion. Participants answered hypothetical scenarios in which they decided either to stay with the status quo or to switch. Results indicated that consistent and inconsistent right-handers both exhibited status quo bias (Experiment 1; N=180), but inconsistent right-handers were more (or less) likely to stick with the status quo when informed of a positive (or negative) past experience. When provided with more equivocal information about the quality of the status quo and alternative, consistent-handers (CH) were more likely to show a status quo bias (Experiment 2; N=222). Compared to CH, we argue that inconsistent-handers (IH) more readily update their beliefs in a manner consistent with how the status quo and alternative options are presented-switching when finding a reason to favour the alternative and staying when the status quo is described more favourably. These handedness differences fit a motivational account explaining status quo bias rather than a loss aversion account.

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“…Behaviorally, inconsistent-handedness is associated with superior performance in tasks that may require access to right-hemisphere based processes such as episodic retrieval [26], accurate body image representation [27] and updating of conceptual beliefs [28]. Thus, the current finding of greater relative right hemisphere activation in IRH relative to CRH, in addition to being related to affect, may also manifest in superior performance for IRH across a wide variety of right-hemisphere processes.…”

Section: Discussionmentioning

confidence: 65%

Asymmetry in Resting Alpha Activity: Effects of Handedness

Propper¹,

Pierce²,

Geisler³

et al. 2012

OJMP

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Study Aim: Frontal electroencephalographic (EEG) alpha band power during rest shows increased right, and/or decreased left, hemisphere activity under conditions of state or trait withdrawal-associated affect. Non-right-handers (NRH) are more likely to have mental illnesses and dispositions that involve such withdrawal-related affect. The aim of the study was to examine whether NRH might be characterized by increased right, relative to left, hemisphere activity during rest. Methods: The present research investigated that hypothesis by examining resting EEG alpha power in consistently-right-handed (CRH) and NRH individuals. Results: In support of the hypothesis, NRH demonstrated decreased right hemisphere alpha power, and therefore increased right hemisphere activity, during rest, compared to CRH. Conclusions: The study demonstrates further support for an association between increased right hemisphere activity and negative affect via an association between such EEG activity and NRH.

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Handedness differences in body image distortion and eating disorder symptomatology

Abstract: The results indicate that strong degrees of handedness are associated with deficits in accurate representation of body image and with increased eating disorder symptomatology in a nonclinical sample. Implications for research into the neural bases of eating disorders are discussed.

Cited by 43 publications

References 55 publications

Interhemispheric Interaction and Saccadic Horizontal Eye MovementsImplications for Episodic Memory, EMDR, and PTSD

Interhemispheric Interaction and Saccadic Horizontal Eye MovementsImplications for Episodic Memory, EMDR, and PTSD

Handedness predicts motivation to switch from the status quo

Asymmetry in Resting Alpha Activity: Effects of Handedness

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