Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Augmentation of induced visual gamma activity by increased task complexity.

Andres Posada1, Etienne Hugues, Nicolas Franck

  • 1Institute for Cognitive Science, 67 Bd Pinel, 69675 Bron cedex, France. posada@isc.cnrs.fr

The European Journal of Neuroscience
|November 19, 2003
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Mapping personal recovery in schizophrenia spectrum disorders: an exploratory machine learning study of self-reported stage classifications.

Frontiers in public health·2026
Same author

Integrating Mental Health and Social Care in Transitional Housing: Horizon Health and Housing Partnership.

Psychiatric services (Washington, D.C.)·2026
Same author

Are routinely collected clinical and sociodemographic characteristics associated with social functioning and activities of daily living in schizophrenia? A machine learning approach descriptive of a schizophrenia cohort.

PloS one·2026
Same author

Anticipating incomplete patient-reported outcomes in schizophrenia: a machine learning approach to predict the occurrence of missing data.

Health and quality of life outcomes·2026
Same author

The staircase-heartbeat discrimination task (S-HDT).

Biological psychology·2026
Same author

Effects of a psychoeducation program for relatives of patients with first-episode psychosis who have received psychoeducation: An observational study.

L'Encephale·2026
Same journal

Hyperthyroidism Is Genetically Associated With Reduced Risk of Parkinson's Disease: A Mendelian Randomization Analysis.

The European journal of neuroscience·2026
Same journal

How Precise Is Predictive Coding for Things We Hear? Mismatch Negativity With Shepard Tones.

The European journal of neuroscience·2026
Same journal

Can Neuroscience Inform Peacebuilding?

The European journal of neuroscience·2026
Same journal

Game-Based Foreign-Language Speech Rehearsal Improves Pitch Processing Beyond Speech Domain.

The European journal of neuroscience·2026
Same journal

Sleep Oscillations Across Cortical, Subcortical and Cerebellar Structures in Magnetoencephalography.

The European journal of neuroscience·2026
Same journal

Freezing of Gait Levodopa Response Pattern in Parkinson's Disease Provides Clues to Pathophysiology.

The European journal of neuroscience·2026
See all related articles

Task complexity significantly increases induced gamma band activity, a brain oscillation linked to attention and perception. This finding highlights how cognitive load influences neural processing for motor responses.

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Human Electrophysiology

Background:

  • Induced gamma band oscillations are increasingly studied for their role in top-down processes, particularly attention.
  • Previous research links increased gamma band energy to enhanced selective attention and visual perception.

Purpose of the Study:

  • To investigate how task complexity, a top-down process, modulates visually induced gamma band oscillations.
  • To explore the relationship between cognitive load and neural activity in sensory processing.

Main Methods:

  • Utilized electroencephalography (EEG) with a 65-electrode net to record cortical electrical activity in 14 human subjects.
  • Employed Morlet wavelets for time-frequency analysis of EEG data to generate detailed maps.
  • Compared gamma band activity during a simple reaction time task versus a more complex rule-based task.

Related Experiment Videos

Main Results:

  • Induced gamma band activity was present in both conditions but showed significantly greater energy during the rule-operation task.
  • This heightened gamma band activity occurred around 276 ms post-stimulus onset.
  • The increased activity was localized to electrodes over the right-central parietal scalp.

Conclusions:

  • Top-down cognitive processes, specifically task complexity, demonstrably modulate induced gamma band activity levels.
  • Gamma oscillations play a crucial role in constructing sensory representations necessary for accurate motor responses.
  • Findings support the involvement of gamma band activity in integrating sensory information under cognitive demand.