The contributions of handedness and working memory to episodic memory

Sahu, Aparna; Christman, Stephen D.; Propper, Ruth E.

doi:10.3758/s13421-016-0625-8

Cited by 10 publications

(8 citation statements)

References 67 publications

(65 reference statements)

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“…This suggests that increased access to the right hemisphere may aid in retrieval, consistent with the HERA model (Tulving et al, 1994; Propper and Christman, 2004; Propper et al, 2005; Chu et al, 2012). However, a recent study did not find any handedness-related behavioral differences in working memory tasks though their findings of an advantage among atypical handers during episodic retrieval were consistent with previous literature (Sahu et al, 2016).…”

Section: Introductionsupporting

confidence: 86%

“…Studies also show a negative relationship between corpus callosum volume and degree of handedness, where increasing atypical handedness is associated with larger corpus callosum volumes (Habib et al, 1991; Witelson and Goldsmith, 1991). In turn, this may be influenced by increased interhemispheric information transfer among atypical- compared to right-handers (Tzourio-Mazoyer et al, 2010; Gao et al, 2015; Sahu et al, 2016). Interhemispheric communication time has been linked to brain volume, and evidence suggests those with larger brains have been shown to group quick cognitive functions in one hemisphere (Ringo et al, 1994).…”

Section: Discussionmentioning

confidence: 99%

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Sex, Age, and Handedness Modulate the Neural Correlates of Active Learning

et al. 2019

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BackgroundSelf-generation of material compared to passive learning results in mproved memory performance; this may be related to recruitment of a fronto-temporal encoding network. Using a verbal paired-associate learning fMRI task, we examined the effects of sex, age, and handedness on the neural correlates of self-generation.MethodsData from 174 healthy English-speaking participants (78M, 56 atypically handed; ages 19–76) were preprocessed using AFNI and FSL. Independent component analysis was conducted using GIFT (Group ICA fMRI Toolbox). Forty-one independent components were temporally sorted by task time series. Retaining correlations (r > 0.25) resulted in three task-positive (“generate”) and three task-negative (“read”) components. Using participants’ back-projected components, we evaluated the effects of sex, handedness, and aging on activation lateralization and localization in task-relevant networks with two-sample t-tests. Further, we examined the linear relationship between sex and neuroimaging data with multiple regression, covarying for scanner, age, and handedness.ResultsTask-positive components identified using ICA revealed a fronto-parietal network involved with self-generation, while task-negative components reflecting passive reading showed temporo-occipital involvement. Compared to older adults, younger adults exhibited greater task-positive involvement of the left inferior frontal gyrus and insula, whereas older adults exhibited reduced prefrontal lateralization. Greater involvement of the left angular gyrus in task-positive encoding networks among right-handed individuals suggests the reliance on left dominant semantic processing areas may be modulated by handedness. Sex effects on task-related encoding networks while controlling for age and handedness suggest increased right hemisphere recruitment among males compared to females, specifically in the paracentral lobe during self-generation and the suparmarginal gyrus during passive reading.ImplicationsIdentified neuroimaging differences suggest that sex, age, and handedness are factors in the differential recruitment of encoding network regions for both passive and active learning.

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Section: Introductionsupporting

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Sex, Age, and Handedness Modulate the Neural Correlates of Active Learning

et al. 2019

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“…For example, we recently demonstrated that a combination of acute exercise and mindfulness meditation was optimal in enhancing aspects of executive function, 11 which has been shown to influence memory function. 12 Further, after memory encoding, mindfulness meditation has been shown to facilitate motor memory consolidation. 13…”

Section: Introductionmentioning

confidence: 99%

Acute exercise and mindfulness meditation on learning and memory: randomized controlled intervention

Austin

Loprinzi

2019

Health Promot Perspect

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Background: The purpose of this experiment was to evaluate the potential combined effects of acute exercise and mindfulness mediation on episodic memory. Methods: All data collection occurred in the authors’ laboratory (January to May of 2019). In this three-arm, within-subject design, participants (N=20; Mage=21.6 years) completed three counterbalanced laboratory visits, including Exercise Only, Exercise + Meditation and Control. Learning and memory were assessed from a word-list task. A one-factor repeated-measures ANOVA was computed for two memory outcomes, including the learning outcome (average performance across the 6 trials) and the long-term memory recall (10-minute delay). Results: The exercise conditions had a greater learning effect when compared to the Control visit, Mdiff = 0.68 (95% CI: 0.10, 1.25), P = 0.02. The Exercise + Memory visit had better longterm memory when compared to Exercise Only, Mdiff = 0.95 (95% CI: 0.07, 1.83), P = 0.03. Conclusion: The present experiment provides suggestive evidence that acute exercise may enhance learning and, when coupling acute exercise prior to encoding with meditation during early consolidation, long-term memory may be enhanced.

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“…A behavioral marker of interhemispheric activation, likely mediated via the corpus callosum, includes an individual’s degree of handedness (left, right, mixed) [2,3]. Sahu et al [4] demonstrated that inconsistent handed (ICH) individuals outperformed consistent-handers on trials 1 and 2 of a multi-trial learning word-list task, but there were no differences for trial 3 or a delayed assessment of memory. Propper et al [5] demonstrated that ICH individuals demonstrated superior recall of both laboratory-based (word-list) and real-world autobiographical memories relative to strongly right-handed individuals.…”

Section: Introductionmentioning

confidence: 99%

“…Adding further complexity to this, past work has shown that right-handed males and left-handed females performed better in visuospatial cognitive tasks, whereas left-handed males and right-handed females performed better in verbal-related cognition [25]. Conversely, Sahu et al [4] did not demonstrate a sex by handedness interaction on a word-list memory task.…”

Section: Introductionmentioning

confidence: 99%

Handedness, Grip Strength, and Memory Function: Considerations by Biological Sex

et al. 2019

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Background and Objective: The objective of this study was to evaluate the potential independent and interactive effects of handedness and grip strength on episodic memory function, and whether biological sex moderated these relationships. Materials and Methods: 162 young adults (Mage = 20.7 years) completed a series of memory assessments including a subjective memory complaint evaluation and several objective measures of memory. Handedness (i.e., left-hand dominant, inconsistent handedness (ICH), and right-hand dominant) was evaluated using the Edinburgh Handedness Inventory. Handgrip strength was determined from a handgrip dynamometer. Results: When compared to ICH individuals, retrospective memory scores were statistically significantly worse for left-handed (p = 0.02) and right-handed (p = 0.03) individuals. Higher grip strength was statistically significantly associated with fewer retrospective memory complaints (b = 0.10, 95% CI: 0.01, 0.19, p = 0.04). Conclusions: The present study provides some suggestive evidence that ICH (inconsistent handedness) and greater grip strength are associated with fewer retrospective memory complaints. However, we did not observe any evidence of an interaction effect of handedness and grip strength on memory, and similarly, biological sex did not interact with these parameters to influence memory.

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The contributions of handedness and working memory to episodic memory

Cited by 10 publications

References 67 publications

Sex, Age, and Handedness Modulate the Neural Correlates of Active Learning

Sex, Age, and Handedness Modulate the Neural Correlates of Active Learning

Acute exercise and mindfulness meditation on learning and memory: randomized controlled intervention

Handedness, Grip Strength, and Memory Function: Considerations by Biological Sex

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