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 Concept Videos

What are Estimates?01:06

What are Estimates?

8.8K
It isn't easy to measure a parameter such as the mean height or the mean weight of a population. So, we draw samples from the population and calculate the mean height or mean weight of the individuals in the sample. This sample data acts as a representative measure of the population parameter. These sample statistics are known as estimates. 
The estimate for the mean of a sample is denoted by ͞x, whereas the mean of the population is designated as μ. Further, parameters such...
8.8K
Standard Electrode Potentials03:02

Standard Electrode Potentials

50.3K
On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
50.3K
Conduction System of the Heart01:19

Conduction System of the Heart

13.4K
Autorhythmicity is a term that refers to the heart's inherent ability to generate electrical signals and instigate muscle contractions. This self-regulating conduction system within the heart consists of two key components: the pacemaker cells and specialized conducting cells.
The pacemaker cells are located in two primary nodes: the sinoatrial (SA) node and the atrioventricular (AV) node. The SA node pacemaker cells can autonomously depolarize, triggering an action potential that leads to the...
13.4K
Conduction System of the Heart01:20

Conduction System of the Heart

3.8K
The cardiac conduction system produces and transmits electrical impulses that prompt myocardial contraction, ensuring efficient heart function. This intricate system ensures that the heart beats in a coordinated and efficient manner, beginning with the atria and then the ventricles. The conduction system optimizes cardiac output by maintaining this precise sequence, which is crucial for adequate blood circulation.
This system relies on the unique properties of nodal and Purkinje cells:...
3.8K
Conduct Disorder01:28

Conduct Disorder

571
Conduct disorder is a complex mental health diagnosis characterized by a repetitive and persistent pattern of behavior that violates societal norms, the rights of others, or age-appropriate rules. The diagnostic criteria for conduct disorder require the presence of at least three problematic behaviors within the past 12 months, with at least one occurring in the past six months. These behaviors are grouped into four categories: aggression toward people and animals; destruction of property;...
571
Electrical Conductivity01:13

Electrical Conductivity

1.8K
In perfect conductors, the electric field inside is always zero due to the abundance of free electrons, which nullify any field by flowing. As a result, any residual charge resides on the surface.
In a practical conductor, an applied electric field may be sustained, causing a flow of electrons, which produce a current. The differential form of the current, the current density, is related to the electric field.
More generally, it is related to the force per unit charge, which involves the...
1.8K

You might also read

Related Articles

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

Sort by
Same author

Aggression in epilepsy and sleep: from historical accounts to brain networks and human behaviour.

Brain : a journal of neurology·2026
Same author

Variational autoencoder for explainable seizure onset phases detection.

Journal of neural engineering·2026
Same author

Pediatric epilepsy surgery: Global survey of invasive explorations.

Epilepsia·2026
Same author

How Thalamo-Cortical Loops Modulate Cortico-Cortical Evoked Potentials?

Brain topography·2026
Same author

Teaching Video NeuroImages: Intracerebral Recording of Rhythmic Ictal Nonclonic Hand Motions of Prefrontal Origin.

Neurology·2026
Same author

High-resolution Bayesian Virtual Epileptic Patient using neural field models.

Network neuroscience (Cambridge, Mass.)·2026
Same journal

Assessment of skin stiffness in systemic sclerosis using optical coherence elastography: A comparative study with histology and clinical parameters.

IEEE transactions on bio-medical engineering·2026
Same journal

Modeling Dyadic Interdependence in Endocrine Functioning: A Multilevel Machine Learning Study of Adults with Cancer and Their Caregivers.

IEEE transactions on bio-medical engineering·2026
Same journal

A Kalman Filter-Based Framework for Granger Causality Assessment: Application in Tracking Maternal-Fetal Heart Rate Coupling.

IEEE transactions on bio-medical engineering·2026
Same journal

Enhancing Volumetric Imaging in Linear-Array Photoacoustic Tomography: multiview fusion with deep learning.

IEEE transactions on bio-medical engineering·2026
Same journal

Robust Rule-based Heuristic Assistance Strategy for a Semi-Active Shoulder Exoskeleton Used in Overhead Work.

IEEE transactions on bio-medical engineering·2026
Same journal

Highly Accelerated 1-mm Isotropic 3D Chemical Exchange Saturation Transfer MRI Using Wave-Co-CAIPI at 5 Tesla.

IEEE transactions on bio-medical engineering·2026
See all related articles

Related Experiment Video

Updated: Feb 3, 2026

Operative Technique and Nuances for the Stereoelectroencephalographic SEEG Methodology Utilizing a Robotic Stereotactic Guidance System
04:50

Operative Technique and Nuances for the Stereoelectroencephalographic SEEG Methodology Utilizing a Robotic Stereotactic Guidance System

Published on: June 9, 2023

4.4K

Biophysical Modeling for Brain Tissue Conductivity Estimation Using SEEG Electrodes.

Andres Carvallo, Julien Modolo, Pascal Benquet

    IEEE Transactions on Bio-Medical Engineering
    |October 30, 2018
    PubMed
    Summary
    This summary is machine-generated.

    This study presents a new method for accurately measuring human brain tissue electrical conductivity using pulsed stimulation. The technique provides absolute conductivity values, outperforming standard bioimpedance measurements for potential diagnostic applications.

    More Related Videos

    P300-Based Brain-Computer Interface Speller Performance Estimation with Classifier-Based Latency Estimation
    06:09

    P300-Based Brain-Computer Interface Speller Performance Estimation with Classifier-Based Latency Estimation

    Published on: September 8, 2023

    958
    Stereo-Electro-Encephalo-Graphy SEEG With Robotic Assistance in the Presurgical Evaluation of Medical Refractory Epilepsy: A Technical Note
    05:54

    Stereo-Electro-Encephalo-Graphy SEEG With Robotic Assistance in the Presurgical Evaluation of Medical Refractory Epilepsy: A Technical Note

    Published on: June 13, 2016

    18.1K

    Related Experiment Videos

    Last Updated: Feb 3, 2026

    Operative Technique and Nuances for the Stereoelectroencephalographic SEEG Methodology Utilizing a Robotic Stereotactic Guidance System
    04:50

    Operative Technique and Nuances for the Stereoelectroencephalographic SEEG Methodology Utilizing a Robotic Stereotactic Guidance System

    Published on: June 9, 2023

    4.4K
    P300-Based Brain-Computer Interface Speller Performance Estimation with Classifier-Based Latency Estimation
    06:09

    P300-Based Brain-Computer Interface Speller Performance Estimation with Classifier-Based Latency Estimation

    Published on: September 8, 2023

    958
    Stereo-Electro-Encephalo-Graphy SEEG With Robotic Assistance in the Presurgical Evaluation of Medical Refractory Epilepsy: A Technical Note
    05:54

    Stereo-Electro-Encephalo-Graphy SEEG With Robotic Assistance in the Presurgical Evaluation of Medical Refractory Epilepsy: A Technical Note

    Published on: June 13, 2016

    18.1K

    Area of Science:

    • Neuroscience
    • Biophysics
    • Electrical Engineering

    Background:

    • Accurate measurement of brain tissue electrical conductivity is crucial for understanding neural function and diagnosing neurological disorders.
    • Current methods like bioimpedance have limitations in providing absolute conductivity values.
    • Stereotactic-EEG (SEEG) offers a unique opportunity for in-vivo conductivity estimation.

    Purpose of the Study:

    • To develop and validate a novel analytical model for estimating human brain tissue electrical conductivity.
    • To utilize local, low-intensity pulsed stimulation for accurate in-vivo measurements.
    • To differentiate conductivity in healthy versus hyperexcitable brain tissue for diagnostic potential.

    Main Methods:

    • Derived an analytical model of the electric field using the quasi-static approximation of Maxwell equations.
    • Coupled the electric field model with an electrode-electrolyte interface model.
    • Validated the biophysical model with saline solutions, rat brain tissue, and clinical SEEG data from epileptic patients.

    Main Results:

    • The model provides an explicit, analytical expression for brain tissue conductivity.
    • The method was successfully validated across different biological and non-biological samples.
    • Demonstrated the ability to distinguish conductivity differences between healthy and pathological brain tissue.

    Conclusions:

    • The developed model-based method offers a fast and reliable estimation of brain tissue electrical conductivity.
    • This approach accounts for electrode-electrolyte interface contributions, improving accuracy.
    • The method's ability to provide absolute conductivity values and differentiate tissue states holds promise for clinical diagnosis.