Behavioral addiction Study Guide

📖 Core Concepts Behavioral addiction – compulsive, rewarding non‑substance activity that continues despite physical, mental, social, or financial harm. Reward system – dopamine‑rich pathways (ventral tegmental area → nucleus accumbens → prefrontal cortex) fire burst spikes that tag actions as rewarding; ΔFosB accumulation in the nucleus accumbens stabilizes these adaptations. Diagnostic categories – DSM‑5 lists gambling disorder as the only formal “addictive” behavior; ICD‑11 adds gaming disorder and a broader “Disorders due to addictive behaviours.” Compulsive Sexual Behavior Disorder (CSBD) – an impulse‑control disorder in ICD‑11 defined by loss of control over intense sexual urges causing distress/impairment; not the same as “sex addiction.” Core criteria (ICD‑11) – impaired control, repetitive harmful behavior, continuation despite negative consequences. 📌 Must Remember ΔFosB → common molecular marker for both drug and behavioral addictions. DSM‑5 vs. ICD‑11 – DSM‑5: only gambling disorder under “Substance‑Related and Addictive Disorders.” ICD‑11: gambling, gaming, and other “addictive behaviours” plus CSBD under impulse‑control. Prevalence – overall behavioral addiction during COVID‑19 ≈ 11 %; gambling disorder 0.1‑6 %; gaming disorder ≈ 5 %; CSBD 3‑6 % of adults. Treatment hierarchy – CBT → first‑line psychotherapy; pharmacotherapy (e.g., naltrexone, topiramate, N‑acetylcysteine) is off‑label and used when needed. Neuro‑imaging hallmark – hyperactivation of bilateral caudate nucleus and reduced cortical thickness/gray‑matter volume across behavioral addictions. 🔄 Key Processes Reward‑learning loop Burst firing of dopamine neurons → release dopamine in nucleus accumbens → reinforcement of behavior → repeated engagement. ΔFosB accumulation Repeated reward → ↑ΔFosB transcription → long‑lasting synaptic changes → compulsive seeking. CBT protocol (for any behavioral addiction) Identify triggers → cognitive restructuring → develop alternative coping skills → relapse‑prevention planning. Pharmacologic modulation Naltrexone blocks μ‑opioid receptors → reduces urge intensity. Topiramate blocks AMPA glutamate receptors → dampens preoccupation. N‑Acetylcysteine restores extracellular glutamate → normalizes cue‑reactivity. 🔍 Key Comparisons Gambling disorder vs. CSBD Cue type: monetary/financial vs. sexual stimuli. Classification: DSM‑5 additive disorder vs. ICD‑11 impulse‑control. Gaming disorder vs. Internet addiction Gaming disorder: specific ICD‑11 diagnosis with loss of self‑control over gaming. Internet addiction: broader, not formally codified, includes excessive non‑gaming online use. Behavioral vs. Substance addiction Shared: dopamine reward circuitry, ΔFosB up‑regulation, compulsive seeking. Divergent: no pharmacologic tolerance/withdrawal in behavioral addictions (except rare physiological dependence). ⚠️ Common Misunderstandings “Sex addiction” = CSBD – false; CSBD has diagnostic criteria; “sex addiction” is a colloquial, non‑clinical label. All excessive behaviors are addictions – not true; must meet impairment, loss of control, and continuation despite harm. Pharmacotherapy is FDA‑approved for behavioral addictions – no medication has formal approval; current drugs are off‑label. 🧠 Mental Models / Intuition “Reward‑prediction error” – think of the brain as a thermostat: when outcomes are better than expected, dopamine spikes and the behavior is “turned up.” Repeated spikes lock the thermostat at a higher set‑point (ΔFosB). “Control‑loss cascade” – each failed attempt to stop → heightened cue‑reactivity → stronger habit loop → greater difficulty regaining control. 🚩 Exceptions & Edge Cases Pornography use – ICD‑11 classifies compulsive sexual behavior as impulse‑control, not an addiction; DSM‑5‑TR does not list it at all. Exercise addiction – can coexist with injury; unlike most addictions, physical injury may be a visible consequence early on. Work addiction – often socially rewarded, making detection harder; may be mislabelled as “high achievement.” 📍 When to Use Which Diagnostic decision – if patient shows impaired control + harmful continuation → apply ICD‑11 “addictive behaviour” criteria; check DSM‑5 for gambling disorder specifically. Therapy selection – start with CBT for any behavioral addiction; add pharmacotherapy if urges remain severe or comorbid substance use is present. Medication choice – naltrexone for strong craving/urge component; topiramate when compulsive preoccupation dominates; N‑acetylcysteine for cue‑reactivity and glutamate dysregulation. 👀 Patterns to Recognize Triad of “time, tolerance, trouble” – increasing time spent, need for more intense activity, and escalating life problems. Cross‑addiction – patients with one behavioral addiction often have comorbid substance‑use or other behavioral addictions. Neuroimaging signature – consistent caudate hyperactivation across gambling, gaming, internet, and CSBD studies. 🗂️ Exam Traps Choosing DSM‑5 vs. ICD‑11 – a question may ask which manual recognizes gaming disorder; answer: ICD‑11 (DSM‑5 only lists it in the appendix). ΔFosB is only in drug addiction – false; it is also induced by natural rewards (sex, exercise, food) and is central to behavioral addictions. Assuming “withdrawal” exists in CSBD – most exams will mark this as incorrect; withdrawal is characteristic of substance use, not CSBD. Labeling “exercise addiction” as a “substance use disorder” – incorrect; it is a behavioral addiction with its own criteria. --- Use this guide to scan quickly before the exam—focus on the bolded keywords, core criteria, and contrasting points.