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

Couple01:29

Couple

A couple is a pair of parallel forces equal in magnitude but in opposite directions. The forces are separated by a perpendicular distance, known as the couple's arm. The couple causes a rotation force or moment that rotates the body about an axis perpendicular to the plane of the forces. The resulting moment is referred to as the couple moment. The SI unit of a couple moment is the Newton-meter (N-m).
A typical example to understand this concept is tightening a bolt with a lug wrench. A force...
Equivalent Couples01:28

Equivalent Couples

In mechanical engineering, the concept of equivalent couples plays a crucial role in understanding and analyzing various mechanical systems.
Two couples are considered to be equivalent if they produce the same rotational effect on a rigid body. In other words, the two couples have the same magnitude and act in the same direction, causing the same angular displacement or acceleration in the body.
For instance, consider two couples lying in the plane of the page, with one having a pair of equal...
Two Force Member01:30

Two Force Member

The equilibrium of a two-force body is a particular case that is often encountered in practical applications. A two-force body is a rigid body that is subjected to only two external forces. For such a body to be in equilibrium, the two forces must have the same magnitude, the same line of action, and the opposite direction.
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)

Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
System of Forces and Couples01:16

System of Forces and Couples

In the analysis of structural systems, it is common to encounter members subjected to various forces and couple moments. Simplifying these systems can make the analysis more manageable and easier to understand. One approach to achieve this simplification is by moving a force to a point O that does not lie on its line of action and adding a couple with a moment equal to the moment of the force about point O.
The principle of transmissibility plays a crucial role in this process. According to...
Simplification of a Force and Couple System: II01:23

Simplification of a Force and Couple System: II

In a three-dimensional system, multiple forces can act on an object. These forces can be combined into a single equivalent force, known as the resultant force. Similarly, the moments generated by these forces can be combined into a single equivalent moment, the resultant couple moment. In certain situations, these two entities may not be mutually perpendicular, meaning they do not have a 90-degree angle between them. This unique condition requires a deeper understanding of the interplay between...

You might also read

Related Articles

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

Sort by
Same author

Moderators and predictors of treatment outcome for OCD: A comparison of cognitive behavioral therapy Exposure Response Prevention to Acceptance and Commitment Therapy.

Psychotherapy research : journal of the Society for Psychotherapy Research·2026
Same author

Time trends of incidence and prevalence of severe mental illness in Danish adults: a nationwide register study.

Nordic journal of psychiatry·2026
Same author

Prevalence and types of anxiety disorders among patients with cardiac conditions and elevated HADS-A scores: findings from the initial screening phase of the Heart and Mind trial in Denmark.

BMJ open·2026
Same author

Educational Differences in Treatment of Individuals Diagnosed With Major Depression: A Register-Based Cohort Study.

Acta psychiatrica Scandinavica·2026
Same author

The role of oxidative stress-induced damage to nucleic acids in mental disorders.

Neuroscience and biobehavioral reviews·2026
Same author

Electroconvulsive therapy and occupational functioning in individuals with major depression.

Journal of affective disorders·2025
Same journal

[Mosaicism as a cause of Cowden syndrome].

Ugeskrift for laeger·2026
Same journal

[Thyrotoxic crisis with cardiogenic shock].

Ugeskrift for laeger·2026
Same journal

[Mindfulness-based cognitive therapy in the treatment of depression].

Ugeskrift for laeger·2026
Same journal

[Fitness].

Ugeskrift for laeger·2026
Same journal

[Risk of developing cataract related to fluoroscopy].

Ugeskrift for laeger·2026
Same journal

[Obturator hernia with small bowel ileus presenting as hip pain in an elderly woman].

Ugeskrift for laeger·2026
See all related articles

Related Experiment Video

Updated: Jun 17, 2026

Demonstrating the Uses of the Novel Gravitational Force Spectrometer to Stretch and Measure Fibrous Proteins
13:51

Demonstrating the Uses of the Novel Gravitational Force Spectrometer to Stretch and Measure Fibrous Proteins

Published on: March 19, 2011

[Folie à deux].

Ida Hageman1, Martin Balslev Jørgensen

  • 1Psykiatrisk Klinik, Rigshospitalet, København Ø. ida.hageman@rh.regionh.dk

Ugeskrift for Laeger
|December 19, 2009
PubMed
Summary
This summary is machine-generated.

Folie à deux is a rare psychiatric condition where one person imposes delusions onto another. This case report details a shared psychotic disorder between two friends, highlighting a less common familial relationship dynamic.

More Related Videos

A GFP Complementation-based Dual-expression System for Assessing Cell-Cell Contact Mediated by Cytonemes in Live Drosophila Wing Imaginal Discs
07:26

A GFP Complementation-based Dual-expression System for Assessing Cell-Cell Contact Mediated by Cytonemes in Live Drosophila Wing Imaginal Discs

Published on: August 22, 2025

Peering into the Dynamics of Social Interactions: Measuring Play Fighting in Rats
15:01

Peering into the Dynamics of Social Interactions: Measuring Play Fighting in Rats

Published on: January 18, 2013

Related Experiment Videos

Last Updated: Jun 17, 2026

Demonstrating the Uses of the Novel Gravitational Force Spectrometer to Stretch and Measure Fibrous Proteins
13:51

Demonstrating the Uses of the Novel Gravitational Force Spectrometer to Stretch and Measure Fibrous Proteins

Published on: March 19, 2011

A GFP Complementation-based Dual-expression System for Assessing Cell-Cell Contact Mediated by Cytonemes in Live Drosophila Wing Imaginal Discs
07:26

A GFP Complementation-based Dual-expression System for Assessing Cell-Cell Contact Mediated by Cytonemes in Live Drosophila Wing Imaginal Discs

Published on: August 22, 2025

Peering into the Dynamics of Social Interactions: Measuring Play Fighting in Rats
15:01

Peering into the Dynamics of Social Interactions: Measuring Play Fighting in Rats

Published on: January 18, 2013

Area of Science:

  • Psychiatry
  • Psychopathology

Background:

  • Folie à deux, or induced psychotic disorder, is a rare psychiatric condition.
  • It involves a shared psychotic delusion between two emotionally close individuals, typically relatives.

Observation:

  • This case report presents a unique instance of folie à deux.
  • The individuals involved were friends, not close relatives, challenging typical epidemiological observations.

Findings:

  • The primary psychotic individual gradually imposed delusional beliefs onto the secondary individual.
  • The case illustrates the transmission of psychosis in a non-familial, close relationship.

Implications:

  • Separation of the individuals, particularly the primary case, can lead to resolution in the secondary person.
  • This case broadens the understanding of relationship dynamics in the transmission of psychotic disorders.