EEG alpha activity reflects attentional demands, and beta activity reflects emotional and cognitive processes

Science ◽  
1985 ◽  
Vol 228 (4700) ◽  
pp. 750-752 ◽  
Author(s):  
W. Ray ◽  
H. Cole
Keyword(s):  
Cognitive Processes ◽  
Alpha Activity ◽  
Beta Activity ◽  
Attentional Demands ◽  
Eeg Alpha ◽  
Eeg Alpha Activity

scholarly journals Functional but not obligatory link between microsaccades and neural modulation by covert spatial attention

2021 ◽  
Author(s):  
Baiwei Liu ◽  
Anna C Nobre ◽  
Freek van Ede
Keyword(s):  
Spatial Attention ◽  
Neural Activity ◽  
Alpha Activity ◽  
Spatial Modulation ◽  
Fixational Eye Movements ◽  
Neural Modulation ◽  
Gaze Behaviour ◽  
Eeg Alpha ◽  
Eeg Alpha Activity ◽  
Spatial Modulations

Covert spatial attention is associated with spatially specific modulation of neural activity as well as with directional biases in fixational eye-movements known as microsaccades. Recently, this link has been suggested to be obligatory, such that modulation of neural activity by covert spatial attention occurs only when paired with microsaccades toward the attended location. Here we revisited this link between microsaccades and neural modulation by covert spatial attention in humans. We investigated spatial modulation of 8-12 Hz EEG alpha activity and microsaccades in a context with no incentive for overt gaze behaviour: when attention is directed internally within the spatial layout of visual working memory. In line with a common attentional origin, we show that spatial modulations of alpha activity and microsaccades co-vary: alpha lateralisation is stronger in trials with microsaccades toward compared to away from the memorised location of the to-be-attended item and occurs earlier in trials with earlier microsaccades toward this item. Critically, however, trials without attention-driven microsaccades nevertheless showed clear spatial modulation of alpha activity - comparable to the neural modulation observed in trials with attention-driven microsaccades. Thus, directional biases in microsaccades are correlated with neural signatures of covert spatial attention, but they are not a prerequisite for neural modulation by covert spatial attention to be manifest.

Topographic distribution of EEG alpha activity during ethanol-induced intoxication in women.

1989 ◽  
Vol 50 (2) ◽  
pp. 176-185 ◽  
Author(s):  
S E Lukas ◽  
J H Mendelson ◽  
B T Woods ◽  
N K Mello ◽  
S K Teoh
Keyword(s):  
Alpha Activity ◽  
Eeg Alpha ◽  
Eeg Alpha Activity ◽  
Topographic Distribution

Skull thickness and magnitude of EEG alpha activity

2008 ◽  
Vol 119 (6) ◽  
pp. 1271-1280 ◽  
Author(s):  
Dirk Hagemann ◽  
Johannes Hewig ◽  
Christof Walter ◽  
Ewald Naumann
Keyword(s):  
Alpha Activity ◽  
Eeg Alpha ◽  
Eeg Alpha Activity ◽  
Skull Thickness

EEG alpha activity increases during transient episodes of ethanol-induced euphoria

1986 ◽  
Vol 25 (4) ◽  
pp. 889-895 ◽  
Author(s):  
Scott E. Lukas ◽  
Jack H. Mendelson ◽  
Richard A. Benedikt ◽  
Bruce Jones
Keyword(s):  
Alpha Activity ◽  
Eeg Alpha ◽  
Eeg Alpha Activity

scholarly journals Frontal EEG alpha activity and obsessive-compulsive behaviors in non-clinical young adults: a pilot study

2015 ◽  
Vol 6 ◽  
Author(s):  
Michael Wong ◽  
Erik Z. Woody ◽  
Louis A. Schmidt ◽  
Michael Van Ameringen ◽  
Noam Soreni ◽  
...  
Keyword(s):  
Young Adults ◽  
Pilot Study ◽  
Alpha Activity ◽  
Obsessive Compulsive ◽  
Compulsive Behaviors ◽  
Eeg Alpha ◽  
Eeg Alpha Activity

scholarly journals Eyes open and shut in cognition: Closing your eyes does not change Intelligence

2017 ◽  
Author(s):  
Protzko ◽  
James Broadway
Keyword(s):  
Alpha Activity ◽  
Reasoning Test ◽  
Fluid Reasoning ◽  
Eyes Open ◽  
Eeg Alpha ◽  
Eeg Alpha Activity ◽  
Alpha Waves

Alpha waves correlate with intelligence. Closing your eyes has been found to be an artifact in EEG research, whereby when a participant closes their eyes there is a spike in EEG alpha activity. If the correlation of alpha waves to intelligence is causal, then increasing alpha waves should increase intelligence. Therefore, people may be more intelligent simply by closing their eyes. We test this with 96 participants randomly assigned to take a verbal fluid reasoning test with either their eyes open or shut. Results show no effect of closing one's eyes on intelligence. Therefore, one of the premises above is incorrect.

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