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

Do changes in coherence always reflect changes in functional coupling?

G Florian1, C Andrew, G Pfurtscheller

  • 1Ludwig Boltzmann-Institute of Medical Informatics and Neuroinformatics, Graz, Austria.

Electroencephalography and Clinical Neurophysiology
|July 29, 1998
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

Canadian Surgery Forum.

Canadian journal of surgery. Journal canadien de chirurgie·2022
Same author

MRI-related anxiety can induce slow BOLD oscillations coupled with cardiac oscillations.

Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology·2021
Same author

SU-E-T-427: Effect of Contrast in Radiadyne Alatus Balloon Packing System on Bladder and Rectal Doses in Gynecological Brachytherapy.

Medical physics·2017
Same author

Discussion of "time-frequency techniques in biomedical signal analysis: a tutorial review of similarities and differences".

Methods of information in medicine·2013
Same author

Toward a hybrid brain-computer interface based on imagined movement and visual attention.

Journal of neural engineering·2010
Same author

Discrimination of motor imagery-induced EEG patterns in patients with complete spinal cord injury.

Computational intelligence and neuroscience·2009
Same journal

Coming to terms with brain waves.

Electroencephalography and clinical neurophysiology·2014
Same journal

Habituation of lower leg stretch responses in Parkinson's disease.

Electroencephalography and clinical neurophysiology·2000
Same journal

Asymmetry of cortical excitability revealed by transcranial stimulation in a patient with focal motor epilepsy and cortical myoclonus.

Electroencephalography and clinical neurophysiology·2000
Same journal

Evoked isometric muscle contractions in myopathies: analysis of pathophysiological properties by different stimulus patterns.

Electroencephalography and clinical neurophysiology·2000
Same journal

Task-related coherence and task-related spectral power changes during sequential finger movements.

Electroencephalography and clinical neurophysiology·2000
Same journal

Electrophysiological studies in mild idiopathic carpal tunnel syndrome.

Electroencephalography and clinical neurophysiology·2000
See all related articles

Central brain activity in the alpha band involves two rhythms: the sensorimotor mu rhythm and parieto-occipital alpha rhythm. This study shows the latter is not from volume conduction, impacting coherence interpretations.

Area of Science:

  • Neuroscience
  • Electroencephalography (EEG)

Background:

  • Alpha band rhythmic activity in central brain regions is traditionally considered to comprise the Rolandic mu rhythm and classical alpha rhythm.
  • The classical alpha rhythm was thought to originate in parieto-occipital areas and spread via volume conduction.

Purpose of the Study:

  • To differentiate the origins of rhythmic activity in the alpha band within central brain regions.
  • To investigate the contribution of volume conduction to the classical alpha rhythm in the central area.
  • To assess the impact of coexisting rhythms on interhemispheric coherence measurements.

Main Methods:

  • Analysis of electroencephalographic (EEG) data.
  • Source localization techniques to identify rhythm origins.
  • Coherence analysis of brain activity.

Related Experiment Videos

Main Results:

  • Demonstrated that the classical alpha rhythm in central areas does not originate from parieto-occipital regions via volume conduction.
  • Identified distinct generators for the mu rhythm and the classical alpha rhythm.
  • Showed that the coexistence of these rhythms significantly affects interhemispheric coherence interpretations.

Conclusions:

  • The classical alpha rhythm in central regions has an intrinsic origin, distinct from parieto-occipital sources.
  • Re-evaluation of EEG interpretation is necessary, considering the independent nature of these alpha rhythms.
  • Findings have implications for understanding sensorimotor function and brain connectivity.