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Related Concept Videos

Obsessive-Compulsive Disorder01:28

Obsessive-Compulsive Disorder

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Obsessive-compulsive disorder (OCD) is a mental health condition characterized by recurrent obsessions, compulsions, or both, which consume significant time and interfere with daily functioning. Obsessions involve persistent, intrusive, and unwanted thoughts, images, or urges that evoke anxiety. Common examples include irrational fears of contamination or harm. Compulsions are repetitive behaviors or mental acts performed to reduce the anxiety caused by obsessions. For instance, individuals...
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Anxiety: Overview01:18

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Anxiety is a common mental disorder featuring excessive worry, fear, and apprehension, significantly affecting daily life. People with anxiety disorders experience persistent and intense anxiety, interrupting their everyday functioning.
Individuals with anxiety often experience a range of physical and emotional symptoms, including sweating, trembling, tachycardia, and disturbances in sleep patterns. These symptoms vary in intensity and frequency but are generally disruptive and distressing.
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Coping Strategies: Problem Focused01:27

Coping Strategies: Problem Focused

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Coping strategies are methods people use to manage, tolerate, or reduce the effects of stressors. These strategies involve both behavioral and psychological actions to handle stressful situations. One common approach is problem-focused coping, which aims to change or eliminate the source of stress rather than merely addressing its consequences. This method involves taking direct action to resolve the issue causing stress.
For example, consider a student who struggles to understand their...
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Panic Disorder01:27

Panic Disorder

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Panic disorder is an anxiety disorder characterized by recurrent and sudden minutes-long episodes of intense fear, known as panic attacks. These attacks may feel like heart attacks and often happen without warning or a specific cause. They can include symptoms such as rapid heart rate, shortness of breath, chest pain, trembling, sweating, dizziness, and a sense of helplessness. During a panic attack, individuals may feel as though they are experiencing a heart attack or are in a...
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Operant Conditioning Intervention01:24

Operant Conditioning Intervention

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Operant conditioning serves as a foundational principle in therapeutic interventions aimed at modifying maladaptive behaviors. Central to this approach is the notion that behaviors, both adaptive and maladaptive, are learned through reinforcement. By analyzing the environmental factors that reinforce problematic behaviors, clinicians can design interventions to weaken these reinforcements and replace maladaptive behaviors with healthier alternatives.
In operant conditioning, behaviors that are...
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Attention-Deficit/Hyperactivity Disorder01:30

Attention-Deficit/Hyperactivity Disorder

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Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by persistent inattention, hyperactivity, and impulsivity. It affects approximately 5-8% of children globally, with around 60-70% of cases persisting into adulthood. ADHD has significant implications for educational attainment, social interactions, and occupational success.
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Updated: Sep 14, 2025

Signal Attenuation as a Rat Model of Obsessive Compulsive Disorder
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Compulsive Coping Behavior, Developed Predominantly by Sign-Trackers, Is Exacerbated by Chronic Atomoxetine.

Chloe S Chernoff1, Aude Belin-Rauscent1, Mickaël Puaud1

  • 1Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, United Kingdom.

Biological Psychiatry
|July 24, 2025
PubMed
Summary
This summary is machine-generated.

Compulsive behaviors like hyperdipsia are influenced by noradrenergic mechanisms. Sign-tracking predicts hyperdipsia development, while atomoxetine exacerbates it and alters gene expression in key brain regions.

Keywords:
CompulsionCopingNoradrenalineNucleus accumbensRatSchedule-induced polydipsia

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Area of Science:

  • Neuroscience
  • Behavioral Science
  • Pharmacology

Background:

  • Loss of control over coping strategies can lead to impulsive/compulsive spectrum disorders (ICSDs).
  • Rats exhibit individual differences in coping behaviors, with some developing excessive drinking (hyperdipsia) under schedule-induced polydipsia (SIP) conditions.
  • Noradrenergic mechanisms, specifically via atomoxetine, can prevent hyperdipsia development in vulnerable rats.

Purpose of the Study:

  • To investigate if noradrenergic mechanisms influence established hyperdipsia.
  • To determine if sign-tracking predicts the development of hyperdipsia.
  • To explore the role of atomoxetine and sign-tracking in compulsive coping behaviors.

Main Methods:

  • Two longitudinal studies were conducted using male Sprague-Dawley rats.
  • Rats were exposed to a schedule-induced polydipsia (SIP) procedure.
  • Gene expression (c-fos, zif268) in brain regions like the dorsal striatum and nucleus accumbens was analyzed using qPCR.

Main Results:

  • Sign-tracking correlated with faster SIP acquisition and development of compulsive drinking.
  • Chronic atomoxetine worsened hyperdipsia and increased c-fos and zif268 mRNA levels in the dorsal striatum.
  • Atomoxetine altered gene expression in the nucleus accumbens shell and amygdalo-striatal system.

Conclusions:

  • Noradrenergic control differs between the development and expression of compulsive coping behaviors.
  • Sign-tracking is a vulnerability trait for developing hyperdipsia.
  • Compulsive coping involves distinct striatal processes influenced by noradrenergic mechanisms.