Alpha and beta cortical activity during guitar playing: task complexity and audiovisual stimulus analysis

2020 ◽  
Vol 37 (4) ◽  
pp. 245-251
Author(s):  
José Artur Aragão Leite ◽  
Mateus Antônio Cândido dos Santos ◽  
Rafael Mariano Camilo da Silva ◽  
Adriano de Oliveira Andrade ◽  
Gustavo Moreira da Silva ◽  
...  
Keyword(s):  
Task Complexity ◽  
Cortical Activity ◽  
Audiovisual Stimulus

scholarly journals Brain Activation During Maximum Concentric and Eccentric Knee Extension Muscle Contractions

2020 ◽  
pp. 1-6
Author(s):  
Ali Sharifnezhad ◽  
Moein Koohestani ◽  
Ali Sharifnezhad ◽  
Ali Abbasi ◽  
Amir-Homayoun Javadi ◽  
...  
Keyword(s):  
Muscle Activation ◽  
Task Complexity ◽  
Control Strategies ◽  
Knee Extensor ◽  
Eccentric Contraction ◽  
Cortical Activity ◽  
Knee Extension ◽  
Muscle Contractions ◽  
System Control ◽  
Alpha Power

Purpose: In spite of mounting evidence indicating that concentric and eccentric knee extensor muscle contractions might have special nervous system control strategies, the differentiation of brain frequencies between concentric and eccentric movements and how the motor cortex programs this contraction has been less studied. In this study, the brain and muscle activation differences during maximum concentric and eccentric contractions were compared. Methods: Nine healthy volunteers performed 20 maximum eccentric and 20 maximum concentric knee extensor contractions. Electroencephalography (EEG) signals from sensorimotor-related cortical areas were recorded simultaneous with the electromyography (EMG) of the knee extensor muscles. In the spectral analysis the performance related power values were calculated for Theta (4-7 Hz) and Alpha (7-12 Hz). Results: The time-domain results revealed, longer time and greater cortical activity is required for the preparation of an eccentric contraction. For the eccentric task, the cortical activity was greater, but the EMG was lower in comparison to the concentric task values. Statistical analysis showed significant higher and lower Theta and Alpha power in both types of contractions compared to the resting state, respectively. Conclusion: These findings suggest that increased Theta power is associated with task complexity and focused attention and decreased Alpha power values with increased information processing in the somatosensory cortex.

scholarly journals Cortical activity modulation of language processing by dynamic optimization of task complexity and functional restrictions

2009 ◽  
Author(s):  
Shantanu Ghosh ◽  
Amrita Basu ◽  
Subash Khushu ◽  
Senthil Kumaran
Keyword(s):  
Language Processing ◽  
Dynamic Optimization ◽  
Task Complexity ◽  
Cortical Activity

Gender Differences in the Mental Rotations Test (MRT) Are Not Due to Task Complexity

2008 ◽  
Vol 29 (3) ◽  
pp. 130-133 ◽  
Author(s):  
Corinna Titze ◽  
Martin Heil ◽  
Petra Jansen
Keyword(s):  
Gender Differences ◽  
Mental Rotation ◽  
Task Complexity ◽  
Time Constraints ◽  
Medium Effects ◽  
Performance Factors ◽  
Mental Rotations ◽  
Sufficient Power ◽  
Forced Choice Tasks ◽  
Choice Tasks

Gender differences are one of the main topics in mental rotation research. This paper focuses on the influence of the performance factor task complexity by using two versions of the Mental Rotations Test (MRT). Some 300 participants completed the test without time constraints, either in the regular version or with a complexity reducing template creating successive two-alternative forced-choice tasks. Results showed that the complexity manipulation did not affect the gender differences at all. These results were supported by a sufficient power to detect medium effects. Although performance factors seem to play a role in solving mental rotation problems, we conclude that the variation of task complexity as realized in the present study did not.

Social stereotypes and information-processing strategies: The impact of task complexity.

1987 ◽  
Vol 52 (5) ◽  
pp. 871-880 ◽  
Author(s):  
Galen V. Bodenhausen ◽  
Meryl Lichtenstein
Keyword(s):  
Information Processing ◽  
Task Complexity ◽  
Social Stereotypes ◽  
Processing Strategies ◽  
The Impact

Residual Cortical Activity in the Blind

1976 ◽  
Vol 21 (1) ◽  
pp. 15-16
Author(s):  
JOHN KOBRICK
Keyword(s):  
Cortical Activity

Dissociation within the anterior attentional system: Effects of task complexity and irrelevant information on reaction time speed and accuracy.

2002 ◽  
Vol 16 (4) ◽  
pp. 500-513 ◽  
Author(s):  
Donald T. Stuss ◽  
Malcolm A. Binns ◽  
Kelly J. Murphy ◽  
Michael P. Alexander
Keyword(s):  
Reaction Time ◽  
Task Complexity ◽  
Irrelevant Information ◽  
Attentional System ◽  
Speed And Accuracy
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