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https://www.readbyqxmd.com/read/28205500/primary-motor-cortex-excitability-is-modulated-during-the-mental-simulation-of-hand-movement
#1
Christian Hyde, Ian Fuelscher, Jarrad A G Lum, Jacqueline Williams, Jason He, Peter G Enticott
OBJECTIVES: It is unclear whether the primary motor cortex (PMC) is involved in the mental simulation of movement [i.e., motor imagery (MI)]. The present study aimed to clarify PMC involvement using a highly novel adaptation of the hand laterality task (HLT). METHODS: Participants were administered single-pulse transcranial magnetic stimulation (TMS) to the hand area of the left PMC (hPMC) at either 50 ms, 400 ms, or 650 ms post stimulus presentation. Motor-evoked potentials (MEPs) were recorded from the right first dorsal interosseous via electromyography...
February 2017: Journal of the International Neuropsychological Society: JINS
https://www.readbyqxmd.com/read/28203219/toward-a-dynamic-probabilistic-model-for-vestibular-cognition
#2
Andrew W Ellis, Fred W Mast
We suggest that research in vestibular cognition will benefit from the theoretical framework of probabilistic models. This will aid in developing an understanding of how interactions between high-level cognition and low-level sensory processing might occur. Many such interactions have been shown experimentally; however, to date, no attempt has been made to systematically explore vestibular cognition by using computational modeling. It is widely assumed that mental imagery and perception share at least in part neural circuitry, and it has been proposed that mental simulation is closely connected to the brain's ability to make predictions...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28196711/acceptance-and-imagery-based-strategies-can-reduce-chocolate-cravings-a-test-of-the-elaborated-intrusion-theory-of-desire
#3
Sophie Schumacher, Eva Kemps, Marika Tiggemann
The elaborated-intrusion theory of desire proposes that craving is a two-stage process whereby initial intrusions about a desired target are subsequently elaborated with mental imagery. The present study tested whether the craving reduction strategies of cognitive defusion and guided imagery could differentially target the intrusion and elaboration stages, respectively, and thus differentially impact the craving process. Participants were randomly assigned to a cognitive defusion, a guided imagery or a mind-wandering control condition...
February 11, 2017: Appetite
https://www.readbyqxmd.com/read/28193311/voluntary-and-involuntary-imagery-in-social-anxiety
#4
Sophie R Homer, Catherine Deeprose
BACKGROUND: Negative mental imagery is ubiquitous in cognitive models of social anxiety and in the social anxiety literature. Previous research has shown that it is causal of increased anxiety, lower social performance ratings and lower implicit self-esteem. Despite its prevalence, few studies have investigated this imagery directly. AIMS: This study aimed to provide an in-depth analysis of the phenomenology of negative imagery experienced by socially anxious individuals, and to compare recurrent and intrusive images with images deliberately generated by participants during the study...
February 14, 2017: Behavioural and Cognitive Psychotherapy
https://www.readbyqxmd.com/read/28187309/eye-movement-during-retrieval-of-emotional-autobiographical-memories
#5
Mohamad El Haj, Jean-Louis Nandrino, Pascal Antoine, Muriel Boucart, Quentin Lenoble
This study assessed whether specific eye movement patterns are observed during emotional autobiographical retrieval. Participants were asked to retrieve positive, negative and neutral memories while their scan path was recorded by an eye-tracker. Results showed that positive and negative emotional memories triggered more fixations and saccades but shorter fixation duration than neutral memories. No significant differences were observed between emotional and neutral memories for duration and amplitude of saccades...
February 7, 2017: Acta Psychologica
https://www.readbyqxmd.com/read/28180015/effects-of-intermittent-theta-burst-stimulation-on-manual-dexterity-and-motor-imagery-in-patients-with-multiple-sclerosis-a-quasi-experimental-controlled-study
#6
Mahdieh Azin, Nasser Zangiabadi, Farhad Iranmanesh, Mohammad Reza Baneshi, Seyedshahab Banihashem
BACKGROUND: Intermittent theta burst stimulation (iTBS) is a repetitive transcranial magnetic stimulation (rTMS) protocol that influences cortical excitability and motor function recovery. OBJECTIVES: This study aimed to investigate the effects of iTBS on manual dexterity and hand motor imagery in multiple sclerosis (MS) patients. METHODS: Thirty-six MS patients were non-randomly assigned into sham (control) or iTBS groups. Then, iTBS was delivered to the primary motor cortex for ten days over two consecutive weeks...
October 2016: Iranian Red Crescent Medical Journal
https://www.readbyqxmd.com/read/28167121/assessing-motor-imagery-in-brain-computer-interface-training-psychological-and-neurophysiological-correlates
#7
Anatoly Vasilyev, Sofya Liburkina, Lev Yakovlev, Olga Perepelkina, Alexander Kaplan
Motor imagery (MI) is considered to be a promising cognitive tool for improving motor skills as well as for rehabilitation therapy of movement disorders. It is believed that MI training efficiency could be improved by using the brain-computer interface (BCI) technology providing real-time feedback on person's mental attempts. While BCI is indeed a convenient and motivating tool for practicing MI, it is not clear whether it could be used for predicting or measuring potential positive impact of the training. In this study, we are trying to establish whether the proficiency in BCI control is associated with any of the neurophysiological or psychological correlates of motor imagery, as well as to determine possible interrelations among them...
February 4, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28152198/brightening-the-day-with-flashes-of-positive-mental-imagery-a-case-study-of-an-individual-with-depression
#8
Simon E Blackwell, Emily A Holmes
This article presents a case example of an individual with current major depression engaging in a positive mental imagery intervention, specifically a computerized cognitive training paradigm involving repeated practice in generating positive imagery in response to ambiguous scenarios. The patient's reported experience of the intervention suggests the potential of the positive imagery intervention to "brighten" everyday life via promoting involuntary "flashes" of positive mental imagery in situations related to the scenarios, with associated beneficial effects on positive affect, future expectations, and behavior...
February 2, 2017: Journal of Clinical Psychology
https://www.readbyqxmd.com/read/28149361/case-study-of-mental-skills-training-for-a-taekwondo-olympian
#9
TaeHee Lim, David Michael O'Sullivan
The purpose of this study was to identify the effect of systematic mental skills training (MST) for a taekwondo gold medallist. Based on MST of other sports, this programme was designed for a single subject who competed in the Olympics. The Korean test of performance strategies, Sport Attributional Style in Korean Athletes, and a few sessions of interviews were applied to investigate the effect of MST. The pre and post-test mean scores of both the Korean test of performance strategies and Sport Attributional Style in Korean Athletes were compared...
April 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28131810/the-effector-independent-nature-of-motor-imagery-evidence-from-rtms-induced-inhibition-to-the-primary-motor-cortices
#10
Sarah N Kraeutner, Tony G J Ingram, Shaun G Boe
Motor imagery (MI), the mental rehearsal of movement, facilitates learning by driving brain activation similar to that of physical practice (PP). However, a growing body of evidence suggests that learning via MI relies more on effector independent as opposed to effector dependent encoding. One approach to probing the nature of MI based learning is to study the primary motor cortex (MC), a brain region known to be critical to effector dependent encoding, but whose involvement in MI is debatable. The current study sought to inform on the nature of MI-based learning by examining the extent to which participants could learn via MI following inhibition of the MC using repetitive transcranial magnetic stimulation (TMS)...
January 25, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28125616/evaluating-the-effect-of-cognitive-dysfunction-on-mental-imagery-in-patients-with-stroke-using-temporal-congruence-and-the-imagined-timed-up-and-go-test-itug
#11
Maxime Geiger, Céline Bonnyaud, Yves-André Fery, Bernard Bussel, Nicolas Roche
BACKGROUND: Motor imagery (MI) capacity may be altered following stroke. MI is evaluated by measuring temporal congruence between the timed performance of an imagined and an executed task. Temporal congruence between imagined and physical gait-related activities has not been evaluated following stroke. Moreover, the effect of cognitive dysfunction on temporal congruence is not known. OBJECTIVE: To assess temporal congruence between the Timed Up and Go test (TUG) and the imagined TUG (iTUG) tests in patients with stroke and to investigate the role played by cognitive dysfunctions in changes in temporal congruence...
2017: PloS One
https://www.readbyqxmd.com/read/28124985/a-genetic-based-feature-selection-approach-in-the-identification-of-left-right-hand-motor-imagery-for-a-brain-computer-interface
#12
Charles Yaacoub, Georges Mhanna, Sandy Rihana
Electroencephalography is a non-invasive measure of the brain electrical activity generated by millions of neurons. Feature extraction in electroencephalography analysis is a core issue that may lead to accurate brain mental state classification. This paper presents a new feature selection method that improves left/right hand movement identification of a motor imagery brain-computer interface, based on genetic algorithms and artificial neural networks used as classifiers. Raw electroencephalography signals are first preprocessed using appropriate filtering...
January 23, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28113943/open-access-dataset-for-eeg-nirs-single-trial-classification
#13
Jaeyoung Shin, Alexander von Luhmann, Benjamin Blankertz, Do-Won Kim, Jichai Jeong, Han-Jeong Hwang, Klaus-Robert Muller
We provide an open access dataset for hybrid brain-computer interfaces (BCIs) using electroencephalography (EEG) and near-infrared spectroscopy (NIRS). For this, we con-ducted two BCI experiments (left vs. right hand motor imagery; mental arithmetic vs. resting state). The dataset was validated using baseline signal analysis methods, with which classification performance was evaluated for each modality and a combination of both modalities. As already shown in previous literature, the capability of discriminating different mental states can be en-hanced by using a hybrid approach, when comparing to single modality analyses...
November 11, 2016: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28113609/a-unified-fisher-s-ratio-learning-method-for-spatial-filter-optimization
#14
Xinyang Li, Cuntai Guan, Haihong Zhang, Kai Keng Ang
To detect the mental task of interest, spatial filtering has been widely used to enhance the spatial resolution of electroencephalography (EEG). However, the effectiveness of spatial filtering is undermined due to the significant nonstationarity of EEG. Based on regularization, most of the conventional stationary spatial filter design methods address the nonstationarity at the cost of the interclass discrimination. Moreover, spatial filter optimization is inconsistent with feature extraction when EEG covariance matrices could not be jointly diagonalized due to the regularization...
August 29, 2016: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28113345/optimized-motor-imagery-paradigm-based-on-imagining-chinese-characters-writing-movement
#15
Zhaoyang Qiu, Brendan Z Allison, Jing Jin, Yu Zhang, Xingyu Wang, Wei Li, Andrzej Cichocki
: Abstract-Background: Motor imagery (MI) is a mental representation of motor behavior. MI-based brain computer interfaces (BCIs) can provide communication for the physically impaired. The performance of MI based BCI mainly depends on the subject's ability to self-modulate EEG signals. Proper training can help naive subjects learn to modulate brain activity proficiently. However, training subjects typically involves abstract motor tasks and is time-consuming. METHODS: To improve the performance of naive subjects during motor imagery, a novel paradigm was presented that would guide naive subjects to modulate brain activity effectively...
January 19, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28075381/the-n-3-polyunsaturated-fatty-acids-supplementation-improved-the-cognitive-function-in-the-chinese-elderly-with-mild-cognitive-impairment-a-double-blind-randomized-controlled-trial
#16
Yacong Bo, Xueyuan Zhang, Youli Wang, Jie You, Han Cui, Yiwei Zhu, Wei Pang, Wei Liu, Yugang Jiang, Quanjun Lu
OBJECTIVE: Intake of n-3 polyunsaturated fatty acids (n-3 PUFAs) may protect against mild cognitive impairment (MCI). However, there is still a lack of the n-3 PUFAs intervention in the elderly with MCI in China. The aim of the present study was to investigate the effect of n-3 PUFA supplementation on cognitive function in the Chinese elderly with MCI. METHODS: Eighty six MCI individuals aged 60 years or older were randomly assigned to receive either n-3 PUFAs (480 mg DHA and 720 mg EPA per day, n = 44) or placebo (olive oil, n = 42) capsules...
January 10, 2017: Nutrients
https://www.readbyqxmd.com/read/28046076/visual-imagery-and-false-memory-for-pictures-a-functional-magnetic-resonance-imaging-study-in-healthy-participants
#17
Christian Stephan-Otto, Sara Siddi, Carl Senior, Daniel Muñoz-Samons, Susana Ochoa, Ana María Sánchez-Laforga, Gildas Brébion
BACKGROUND: Visual mental imagery might be critical in the ability to discriminate imagined from perceived pictures. Our aim was to investigate the neural bases of this specific type of reality-monitoring process in individuals with high visual imagery abilities. METHODS: A reality-monitoring task was administered to twenty-six healthy participants using functional magnetic resonance imaging. During the encoding phase, 45 words designating common items, and 45 pictures of other common items, were presented in random order...
2017: PloS One
https://www.readbyqxmd.com/read/28028496/cepstral-analysis-of-eeg-during-visual-perception-and-mental-imagery-reveals-the-influence-of-artistic-expertise
#18
Nasrin Shourie
In this article, multichannel electroencephalogram (EEG) signals of artists and nonartists were analyzed during the performances of visual perception and mental imagery of paintings using cepstrum coefficients. Each of the calculated cepstrum coefficients and their parameters such as energy, average, standard deviation and entropy were separately used for distinguishing the two groups. It was found that a distinguishing coefficient might exist among the cepstrum coefficients, which could separate the two groups despite electrode placement...
October 2016: Journal of Medical Signals and Sensors
https://www.readbyqxmd.com/read/28026196/unresolved-loss-a-risk-factor-for-offspring-predicts-event-related-potential-responses-to-death-related-imagery
#19
Naomi I Gribneau Bahm, Emiliana R Simon-Thomas, Mary Main, Erik Hesse
This study investigates whether individual differences in attachment status can be detected by electrophysiological responses to loss-themed pictures. The Adult Attachment Interview (AAI) was used to identify discourse/reasoning lapses during the discussion of loss experiences via death that place speakers in the Unresolved/disorganized AAI category. In parents, Unresolved AAI status has been associated with Disorganized infant Strange Situation response, a known risk factor for psychopathology (e.g., internalizing/externalizing/dissociation)...
January 2017: Developmental Psychology
https://www.readbyqxmd.com/read/28011171/mental-rotation-task-specifically-modulates-functional-connectivity-strength-of-intrinsic-brain-activity-in-low-frequency-domains-a-maximum-uncertainty-linear-discriminant-analysis
#20
Mengxia Gao, Delong Zhang, Zengjian Wang, Bishan Liang, Yuxuan Cai, Zhenni Gao, Junchao Li, Song Chang, Bingqing Jiao, Ruiwang Huang, Ming Liu
Neuroimaging studies have highlighted that intrinsic brain activity is modified to implement task demands. However, the relation between mental rotation and intrinsic brain activity remains unclear. To answer this question, we collected functional MRI (fMRI) data from 30 healthy participants in two mental rotation task periods (1st-task state, 2nd-task state) and two rest periods before (pre-task resting state) and after the task (post-task resting state) respectively. By combining the spatial independent component analysis (ICA) and voxel-wise functional connectivity strength (FCS), we identified FCS maps of 10 brain resting state networks (RSNs) within six different bands (i...
December 20, 2016: Behavioural Brain Research
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