Keita Kamijo

Keita Kamijo
Chukyo University · Faculty of Liberal Arts and Sciences

Ph.D.

About

89
Publications
17,590
Reads
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3,218
Citations
Additional affiliations
April 2012 - present
Waseda University
Position
  • Professor (Assistant)

Publications

Publications (89)
Article
Full-text available
Specific nervous system functions and the regulating roles of oxytocin have evolved due to the necessity to negotiate increasingly complex social systems. We hypothesize that acute and long-term physical activity and exercise have the potential to benefit social cognitive abilities, such as emotion recognition and regulation, by operating these fun...
Article
Working memory is crucial to learning and academic success. Exercise has been found to benefit working memory in late life, but its effects during cognitive development are less clear. Building on findings that working memory is supported by the motor system, we highlight the sensitivity of different working memory components to acute and long-term...
Article
Full-text available
We investigated modality differences in the N2 and P3 components of event-related potentials (ERPs) between somatosensory and auditory Go/No-go paradigms in eighteen healthy prepubescent children (mean age: 125.9±4.2 months). We also evaluated the relationship between behavioral responses (reaction time, reaction time variability, and omission and...
Article
Full-text available
An increasing number of studies has focused on the after-effects of acute aerobic exercise on executive function. To date, empirical evidence lacks consensus regarding whether acute aerobic exercise has beneficial effects on executive function. To identify possible sources of this discrepancy, the present study focused on executive function demands...
Article
Full-text available
Exercise is an integral part of children’s lives, and research in educational settings has found that regular engagement promises improvements in executive function (i.e. top-down control of goal-directed behavior). Based on recent advances in understanding the moderators and the neurocognitive mechanisms of these effects, we highlight a potential...
Article
Full-text available
Accumulating evidence shows a beneficial association between physical fitness and school children’s academic performance. However, several other studies have failed to demonstrate such an association. We reanalyzed data of a two-year longitudinal study of the association between changes in cardiorespiratory fitness and academic performance of schoo...
Article
Full-text available
The present study was designed to examine the influence of explanation-based knowledge regarding system functions and the driver’s role in conditionally automated driving (Level 3, as defined in SAE J3016). In particular, we studied how safely and successfully drivers assume control of the vehicle when encountering situations that exceed the automa...
Preprint
Full-text available
Cooperation is required for human beings to survive and thrive. In the past decade, to deepen the understanding of human cooperation, more attention has been paid to default prosocial behavior and calculated selfish behavior in the adult population. Whether prosocial behavior is due to an intrinsically altruistic nature or to internalized social no...
Article
This study investigated the effects of high-intensity interval training¹ (HIIT) and moderate-intensity continuous exercise² (MICE) on behavioral performance and neural correlates of working memory. Thirty-six 18–30 years adults were recruited to perform a 20-min bout of HIIT, MICE, and rest on separate days in counterbalanced order. Following inter...
Article
Full-text available
Findings regarding the effects of regular physical activity on cognition in children have been inconsistent due to a number of demographic factors and experimental considerations. The present study was designed to examine baseline cognitive performance and executive function demands, as possible factors underlying the lack of consensus in the liter...
Article
Full-text available
As cognitive function is linked with academic achievement, career success and mental health, there is a need to understand how the cognitive benefits of long-term exercise can be optimized. Our meta-regression included 80 randomized controlled trials and examined moderators of the effects of exercise on cognition in healthy individuals. The summary...
Article
Full-text available
The global pandemic of childhood physical inactivity and the associated reduction in physical fitness have become the major health problem. Based on such background, there is growing interest in child development research to investigate the associations among physical fitness, cognitive function, and the underlying neurobiological mechanisms. In th...
Article
The present study examined the characteristics of somatosensory processing in healthy prepubescent children (mean age: 124.9 ± 3.8 months) compared with young adults. Somatosensory evoked potentials at the frontal (Fz) and centroparietal (C3') electrodes were recorded by delivering an electrical stimulus to the right median nerve at a rate of 3 Hz....
Article
The purpose of the study was the examination of the longitudinal association between motor competences and changes in preparatory processing during a task requiring working memory maintenance. At baseline, 52 Cau-casian children aged 10-12 years completed the MOBAK-5 test battery and a Sternberg task, whereas the cue-P300 and the initial contingent...
Article
An emerging body of evidence has begun to document the beneficial after effects of single bouts — or doses — of physical activity for cognition. This article highlights a selection of common themes and critical delimitations that investigators new to this area of research as well as those currently working in the field may find relevant for advanci...
Article
Full-text available
Purpose: This study examined the aftereffects of cognitively demanding acute aerobic exercise on working memory in middle-aged individuals. Methods: In a within-participants design, middle-aged males (n = 28) performed a 2-back task to assess working memory before, immediately after, and 30 min after the following three interventions: 1) a rest-...
Article
Objectives: To examine the effects of a structured exercise program implemented during school break-time on working memory maintenance and neurophysiological indices of task preparation processes in adolescents. Design: Using class-wise random allocation, participants from four classes were divided into an exercise (n=20) and a wait-list control...
Article
Full-text available
We investigated how aerobic exercise during encoding affects hippocampus-dependent memory through a source memory task that assessed hippocampus-independent familiarity and hippocampus-dependent recollection processes. Using a within-participants design, young adult participants performed a memory-encoding task while performing a cycling exercise o...
Article
The global epidemic of sedentary lifestyles and concomitant decline in fitness during childhood has become a major public health concern. Under these circumstances, a growing body of evidence has shown that greater participation in physical activity and greater aerobic fitness are associated with superior academic achievement. These findings emphas...
Chapter
Over the last decade and a half, an increasing number of empirical studies have identified a positive relationship, across the human lifespan, between physical activity and fitness, on the one hand, and cognitive functioning on the other. Neuroelectric studies using electroencephalogram (EEG), specifically an event-related brain potential (ERP) met...
Article
Full-text available
A growing number of studies conducted over the past decade have demonstrated that greater aerobic fitness is associated with superior cognitive control in preadolescent children. Several studies have suggested that the relationship between fitness and cognitive control may be attributed to differential reliance on proactive vs. reactive cognitive c...
Article
Full-text available
Several studies have indicated that higher levels of childhood aerobic fitness are associated with superior cognitive function, and this association is disproportionately observed in tasks requiring greater top-down control. We designed the current study to clarify the relationship between childhood fitness and top-down control in terms of function...
Article
Full-text available
An increasing number of studies have examined the effects of acute aerobic exercise on executive function (i.e., higher-order cognitive abilities involved in goal-directed behaviors) in healthy children. More recently, studies have begun to extend these empirical findings to children with neurodevelopmental disorders such as attention-deficit/hyper...
Article
Full-text available
Several studies have claimed that the positive association between childhood fitness and cognitive control is attributable to differences in the child’s cognitive control strategy, which can involve either proactive or reactive control. The present study tested this hypothesis by manipulating the probability of trial types during a modified flanker...
Data
Demographic, fitness, behavioral, and neuroelectric data for the 42 participants. (XLSX)
Data
pN/BP analysis and results. (DOCX)
Data
A: Grand averaged stimulus-locked ERP waveforms for each condition at Fpz (pN) and Cz (BP) electrode site. B: Topographical maps of the pN/BP amplitudes for each condition. (PDF)
Article
A growing number of neuroelectric studies using event-related brain potentials have demonstrated that greater aerobic fitness is associated with superior cognitive functioning across the lifespan. However, empirical data regarding the association between fitness and attentional orienting is scarce, with no evidence in children, and the findings are...
Article
This study examined how single bouts of exercise may differentially modulate neuroelectric correlates of attentional orienting and processing. Using a within-participants design, ERPs and task performance were assessed in response to a perceptually challenging three-stimulus oddball task prior to and following a bout of exercise or seated rest duri...
Article
The worldwide pandemic of childhood obesity is now recognized as a serious public health concern. Several recent studies have indicated that childhood obesity is inversely associated with academic achievement, suggesting that maintaining a healthy weight likely be important for cognitive development. However, evidence regarding such an association...
Chapter
In this chapter we provide additional insight into the association between aerobic fitness and cognitive flexibility in preadolescent children. We compared lower-fit and higher-fit children’s task performance during the Trail Making Test (TMT). The TMT consists of two parts. TMT-A requires participants to draw a line connecting 25 randomly position...
Article
With the increasing prevalence of sedentary behaviors during childhood, a greater understanding of the extent to which excess adiposity and aerobic fitness relate to cognitive health is of increasing importance. To date, however, the vast majority of research in this area has focused on adiposity or fitness, rather than the possible inter-relations...
Article
Full-text available
Objective: To assess the effect of a physical activity (PA) intervention on brain and behavioral indices of executive control in preadolescent children. Methods: Two hundred twenty-one children (7-9 years) were randomly assigned to a 9-month afterschool PA program or a wait-list control. In addition to changes in fitness (maximal oxygen consumpt...
Article
Objective This study examined the association between physical activity level and primitive cognitive processing during a face recognition task in young adults, a topic that has received little attention. Design Cross-sectional. Method The face recognition task required participants to respond to famous faces but not respond to unfamiliar faces....
Article
Full-text available
The relationship of physical activity to trial-by-trial adjustments of response conflict was assessed using behavioral task performance, the N2 event-related brain potential component, and phase-locking values (PLVs) in a lower gamma band during a perceptual conflict task. Nineteen physically active and 19 inactive young adults (mean age = 21.3 yea...
Article
Full-text available
This study examined whether wearing a pair of core-supporting gym shorts influenced cognitive control and mood state following aerobic exercise in young adults. Cognitive performance and the event-related P3 potential were measured. Twenty-four adults were assigned to either the core-supporting shorts group or the normal shorts group. Participants...
Article
Full-text available
The global epidemic of childhood obesity has become a major public health concern. Yet, evidence regarding the association between childhood obesity and cognitive health has remained scarce. This study examined the relationship between obesity and cognitive control using neuroelectric and behavioral measures of action monitoring in preadolescent ch...
Article
To examine whether childhood obesity is associated with inhibitory control, we compared healthy weight and obese preadolescent children's task performance along with the N2 and P3 components during a Go/NoGo task. Results indicated that obese children exhibited lower response accuracy relative to healthy weight children during the NoGo task requiri...
Article
Full-text available
Recent studies employing stimulus-response compatibility tasks suggest that an increase in the amplitude of the positive deflection of the response-locked event-related potential (ERP) foreshadows errors on forthcoming trials. However, no studies have tested the generalizability of error-foreshadowing positivity to tasks without stimulus-response i...
Article
Adiposity may be negatively associated with cognitive function in children. However, the findings remain controversial, in part due to the multifaceted nature of cognition and perhaps the lack of accurate assessment of adiposity. The aim of this study was to clarify the relation of weight status to cognition in preadolescent children using a compre...
Chapter
Full-text available
This chapter describes a program of research aimed at the relation of physical activity to brain health and cognition, with implications for scholastic achievement among youth. We describe a body of neurophysiological research that indicates that both chronic and acute physical activity relate to enhanced cognitive function, albeit over a different...
Article
The present study examined the effects of a 9-month randomized control physical activity intervention aimed at improving cardiorespiratory fitness on changes in working memory performance in preadolescent children relative to a waitlist control group. Participants performed a modified Sternberg task, which manipulated working memory demands based o...
Article
A growing body of research has detailed the beneficial relation of chronic participation in--and acute responses to--physical activity on aspects of cognition that underlie scholastic achievement. Here, we review the relevant neuroelectric findings on this beneficial relation in children, providing support for the influence of physical activity on...
Article
To investigate the relation of physical activity to functional connectivity between brain regions during an executive control task using phase-locking values (PLVs) and a graph theoretical analysis. Twenty active and 20 sedentary young adults had their electroencephalograms recorded during a spatial priming task. The positive and negative priming c...
Article
The relationship between physical activity levels and executive control functioning was examined in 40 young adults (mean age = 21.4 yrs; 19 females) who were grouped on the basis of their regular physical activity level. Participants performed a task switching paradigm with two conditions. The pure task condition required repeated performance on a...
Article
The relation of aerobic fitness to task preparation was examined in a sample of young adults separated into higher- and lower-fit groups according to their maximal oxygen consumption. Participants performed a modified Sternberg working memory task under speed and accuracy instructions while measures of task performance and contingent negative varia...
Article
Full-text available
The present study investigated the effects of acute aerobic exercise on cognitive brain functions of older adults. Twenty-four males (12 older and 12 younger adults) performed a modified flanker task during a baseline session (no exercise) and after light and moderate cycling exercise in counterbalanced order on different days while measures of tas...
Article
To investigate the relationship between general physical activity level and the cognitive functions of executive control in young adults using behavioral measures and event-related brain potentials. Forty young adults (mean age=21.1 yrs; 19 females) were differentiated on the basis of their regular physical activity level into two groups: active an...
Article
The interactive effects of exercise intensity and physical activity level on the brain and cognition of young adults were investigated using the electromyographic reaction time (EMG-RT), the P3, and the NoGo P3, as well as the contingent negative variation (CNV) of event-related brain potentials. Participants (n = 26: 24.0 ± 0.7 years) were divided...
Article
The aging effects on subitizing were investigated using event-related brain potentials. Forty younger adults and 35 older adults perfonned an enumeration task in the subitizing range (i.e., 1 to 4 items). Results showed the slope of reaction times were steeper for older adults compared to younger adults, in dicating subitizing speed is affected by...
Article
The interactive effect of exercise intensity and task difficulty on human cognitive processing was investigated using the P3 component of an event-related brain potential (ERP). Exercise intensity was established using Borg's rating of perceived exertion (RPE) scale, and task difficulty was manipulated using a modified flanker task comprised of inc...
Article
The influence of self-prescribed exercise intensity on information processing in the central nervous system (CNS) was investigated using P300, no-go P300, and contingent negative variation (CNV) event-related potentials (ERP). Thirteen subjects aged 22-35y performed a go/no-go reaction time task under a control condition, and again after self- and...