scholarly journals Intraoperative Frontal Alpha-Band Power Correlates with Preoperative Neurocognitive Function in Older Adults

2017 ◽  
Vol 11 ◽  
Author(s):  
Charles M. Giattino ◽  
Jacob E. Gardner ◽  
Faris M. Sbahi ◽  
Kenneth C. Roberts ◽  
Mary Cooter ◽  
...  
Keyword(s):  
Older Adults ◽  
Neurocognitive Function ◽  
Alpha Band ◽  
Band Power

scholarly journals The Cortical Dynamics of Dual-Task Standing in Older Adults

2021 ◽  
Vol 5 (Supplement_1) ◽  
pp. 72-73
Author(s):  
Melike Kahya ◽  
On-Yee Lo ◽  
Junhong Zhou ◽  
Alvaro Pascual-Leone ◽  
Lewis Lipsitz ◽  
...  
Keyword(s):  
Older Adults ◽  
Dual Task ◽  
Postural Sway ◽  
Cognitive Task ◽  
Quiet Standing ◽  
Power Ratio ◽  
Alpha Band ◽  
Dual Tasking ◽  
Band Power ◽  
Beta Power

Abstract In older adults, the extent to which performing a cognitive task when standing diminishes postural control is predictive of future falls and cognitive decline. The cortical control of such “dual-tasking,” however, remains poorly understood. Electroencephalogram (EEG) studies have demonstrated that the level of attention and cognitive inhibitory activity during cognitive task performance can be quantified by changes in brain activity in specific frequency bands; namely, an increase in theta/beta ratio and a decrease in alpha-band power, respectively. We hypothesized that in older adults, dual-tasking would increase theta/beta ratio and decrease alpha-band power, and, that greater alpha-band power during quiet standing would predict worse dual-task performance. To test this hypothesis, we recorded postural sway and EEG (32-channels) in 30 older adults without overt disease as they completed trials of standing, with and without verbalized serial subtractions, on four separate visits. Postural sway speed, as well as absolute theta/beta power ratio and alpha-band power, were calculated. The theta/beta power ratio and alpha-band power demonstrated high test-retest reliability during quiet and dual-task standing across visits (intra-class correlation coefficients >0.70). Compared with quiet standing, dual-tasking increased theta/beta power ratio (p<0.0001) and decreased alpha-band power (p=0.002). Participants who exhibited greater alpha-band power during quiet standing demonstrated a greater dual-task cost (i.e., percent increase, indicative of worse performance) to postural sway speed (r=0.3, p=0.01). These results suggest that in older adults, dual-tasking while standing increases EEG-derived metrics related to attention, and, that greater cognitive inhibitory activity during quiet standing is associated with worse dual-task standing performance.

scholarly journals Increased Alpha-Band Power during the Retention of Shapes and Shape-Location Associations in Visual Short-Term Memory

2011 ◽  
Vol 2 ◽  
Author(s):  
Jeffrey S. Johnson ◽  
David W. Sutterer ◽  
Daniel J. Acheson ◽  
Jarrod A. Lewis-Peacock ◽  
Bradley R. Postle
Keyword(s):  
Short Term Memory ◽  
Alpha Band ◽  
Short Term ◽  
Term Memory ◽  
Visual Short Term Memory ◽  
Band Power

scholarly journals Propofol Requirement and EEG Alpha Band Power During General Anesthesia Provide Complementary Views on Preoperative Cognitive Decline

2020 ◽  
Vol 12 ◽  
Author(s):  
Cyril Touchard ◽  
Jérôme Cartailler ◽  
Charlotte Levé ◽  
José Serrano ◽  
David Sabbagh ◽  
...  
Keyword(s):  
Cognitive Decline ◽  
General Anesthesia ◽  
Logistic Models ◽  
Alpha Band ◽  
Target Concentration ◽  
Operative Morbidity ◽  
Band Power ◽  
Cognitive Evaluation ◽  
Eeg Alpha ◽  
Better Than

Background: Although cognitive decline (CD) is associated with increased post-operative morbidity and mortality, routinely screening patients remains difficult. The main objective of this prospective study is to use the EEG response to a Propofol-based general anesthesia (GA) to reveal CD.Methods: 42 patients with collected EEG and Propofol target concentration infusion (TCI) during GA had a preoperative cognitive assessment using MoCA. We evaluated the performance of three variables to detect CD (MoCA < 25 points): age, Propofol requirement to induce unconsciousness (TCI at SEF95: 8–13 Hz) and the frontal alpha band power (AP at SEF95: 8–13 Hz).Results: The 17 patients (40%) with CD were significantly older (p < 0.001), had lower TCI (p < 0.001), and AP (p < 0.001). We found using logistic models that TCI and AP were the best set of variables associated with CD (AUC: 0.89) and performed better than age (p < 0.05). Propofol TCI had a greater impact on CD probability compared to AP, although both were complementary in detecting CD.Conclusion: TCI and AP contribute additively to reveal patient with preoperative cognitive decline. Further research on post-operative cognitive trajectory are necessary to confirm the interest of intra operative variables in addition or as a substitute to cognitive evaluation.

Cardiovascular fitness and neurocognitive function in older Adults: a brief review

2004 ◽  
Vol 18 (3) ◽  
pp. 214-220 ◽  
Author(s):  
Edward McAuley ◽  
Arthur F Kramer ◽  
Stanley J Colcombe
Keyword(s):  
Older Adults ◽  
Neurocognitive Function ◽  
Cardiovascular Fitness

Influence of Aerobic Fitness on the Neurocognitive Function of Older Adults

2000 ◽  
Vol 8 (4) ◽  
pp. 379-385 ◽  
Author(s):  
Arthur F. Kramer ◽  
Sowon Hahn ◽  
Edward McAuley
Keyword(s):  
Older Adults ◽  
Aerobic Fitness ◽  
Executive Control ◽  
Strong Support ◽  
Preliminary Evidence ◽  
Neurocognitive Function ◽  
Cross Sectional ◽  
Task Coordination ◽  
The Relationship ◽  
New Hypothesis

The article provides a brief review of the literature on the relationship between aerobic Fitness and neurocognitive function, particularly as it relates to older adults. Cross-sectional studies provide strong support for the beneficial influence of fitness on neurocognitive function. The longitudinal or interventional literature, however, provides more equivocal support for this relationship. In discussing the literature, the authors introduce a new hypothesis, the executive control/fitness hypothesis, which suggests that selective neurocognitive benefits will be observed with improvements in aerobic fitness; that is, executive control processes that include planning, scheduling, task coordination, inhibition, and working memory will benefit from enhanced fitness. Preliminary evidence for this hypothesis is discussed.

U-shaped Relation between Prestimulus Alpha-band and Poststimulus Gamma-band Power in Temporal Tactile Perception in the Human Somatosensory Cortex

2018 ◽  
Vol 30 (4) ◽  
pp. 552-564 ◽  
Author(s):  
Marc André Wittenberg ◽  
Thomas J. Baumgarten ◽  
Alfons Schnitzler ◽  
Joachim Lange
Keyword(s):  
Gamma Band ◽  
Gamma Activity ◽  
Left Index Finger ◽  
Behavioral Performance ◽  
Alpha Band ◽  
Band Power ◽  
And Performance ◽  
Electrical Stimuli ◽  
Gamma Band Oscillations ◽  
Human Nervous System

Neuronal oscillations are a ubiquitous phenomenon in the human nervous system. Alpha-band oscillations (8–12 Hz) have been shown to correlate negatively with attention and performance, whereas gamma-band oscillations (40–150 Hz) correlate positively. Here, we studied the relation between prestimulus alpha-band power and poststimulus gamma-band power in a suprathreshold tactile discrimination task. Participants received two electrical stimuli to their left index finger with different SOAs (0 msec, 100 msec, intermediate SOA, intermediate SOA ± 10 msec). The intermediate SOA was individually determined so that stimulation was bistable, and participants perceived one stimulus in half of the trials and two stimuli in the other half. We measured neuronal activity with magnetoencephalography (MEG). In trials with intermediate SOAs, behavioral performance correlated inversely with prestimulus alpha-band power but did not correlate with poststimulus gamma-band power. Poststimulus gamma-band power was high in trials with low and high prestimulus alpha-band power and low for intermediate prestimulus alpha-band power (i.e., U-shaped). We suggest that prestimulus alpha activity modulates poststimulus gamma activity and subsequent perception: (1) low prestimulus alpha-band power leads to high poststimulus gamma-band power, biasing perception such that two stimuli were perceived; (2) intermediate prestimulus alpha-band power leads to low gamma-band power (interpreted as inefficient stimulus processing), consequently, perception was not biased in either direction; and (3) high prestimulus alpha-band power leads to high poststimulus gamma-band power, biasing perception such that only one stimulus was perceived.

scholarly journals Age and APOE genotype affect the relationship between objectively measured physical activity and power in the alpha band, a marker of brain disease.

2020 ◽  
Author(s):  
Jaisalmer de Frutos-Lucas ◽  
Pablo Cuesta ◽  
Federico Ramirez-Toraño ◽  
Alberto Nebreda ◽  
Esther Cuadrado-Soto ◽  
...  
Keyword(s):  
Physical Activity ◽  
Older Adults ◽  
Protective Factor ◽  
Brain Activity ◽  
Apoe Genotype ◽  
Alpha Power ◽  
Alpha Band ◽  
Electrophysiological Studies ◽  
The Relationship ◽  
Predicted Risk

Abstract BACKGROUND Electrophysiological studies show that reductions in power within the alpha band are associated with the Alzheimer’s disease (AD) continuum. Physical activity (PA) is a protective factor that has proved to reduce AD risk and pathological brain burden. Previous research has confirmed that exercise increases power in the alpha range. However, little is known regarding whether other non-modifiable risk factors for AD, such as increased age or APOE ε4 carriage, alter the association between PA and power in the alpha band.METHODS The relationship between PA and alpha power band was examined in a sample of 113 healthy adults using magnetoencephalography. Additionally, we explored whether ε4 carriage and age modulate this association. The correlations between alpha power and gray matter volumes and cognition were also investigated.RESULTS We detected a parieto-occipital cluster in which PA positively correlated with alpha power. The association between PA and alpha power remained following stratification of the cohort by genotype. Younger and older adults were investigated separately, and younger adults only exhibited a positive relationship between PA and alpha power. Interestingly, when four groups were created based on age (younger-older adult) and APOE (E3/E3-E3/E4), only younger E3/E3 (least predicted risk) and older E3/E4 (greatest predicted risk) had associations between greater alpha power and higher PA. Among older E3/E4, greater alpha power in these regions was associated with improved memory and preserved brain structure.CONCLUSION PA could protect against the slowing of brain activity that characterizes the AD continuum, where it is of benefit for all individuals, especially E3/E4 older adults.

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