5.4 Somatic Symptom, Dissociative, and Sleep-Wake Disorders

5.4 Somatic Symptom, Dissociative, and Sleep-Wake Disorders

Quick Answer: Somatic symptom disorders feature prominent physical symptoms or health preoccupations accompanied by disproportionate psychological distress and impairment. In Somatic Symptom Disorder, actual symptoms exist with excessive anxiety; in Illness Anxiety Disorder, symptoms are absent or minimal, but disease conviction is high. Conversion Disorder involves neurological deficits incompatible with anatomy. Factitious Disorder involves symptom fabrication for internal psychological gain (the sick role), whereas Malingering is intentional deception for external tangible gain (a V-code). Dissociative disorders involve disruptions in identity and memory (e.g., DID, Dissociative Amnesia). Sleep-wake disorders include Insomnia (treated first-line with CBT-I) and Narcolepsy (marked by cataplexy and REM intrusion).

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Somatic Symptom and Related Disorders

The DSM-5-TR conceptualization of Somatic Symptom and Related Disorders represents a fundamental paradigm shift from DSM-IV. In DSM-IV, diagnoses like Somatization Disorder and Hypochondriasis required symptoms to be medically unexplained. In DSM-5-TR, medically unexplained symptoms are no longer required. Instead, the diagnosis is defined by the excessive and maladaptive thoughts, feelings, and behaviors in response to somatic symptoms.

1. Somatic Symptom Disorder (SSD)

• Diagnostic Criteria:
  1. One or more somatic symptoms that are distressing or result in significant disruption of daily life.
  2. Excessive thoughts, feelings, or behaviors related to the somatic symptoms or associated health concerns as manifested by at least one of the following:
     • Disproportionate and persistent thoughts about the seriousness of one's symptoms.
     • Persistently high level of anxiety about health or symptoms.
     • Excessive time and energy devoted to these symptoms or health concerns.
  3. Duration: Although any one somatic symptom may not be continuously present, the state of being symptomatic is persistent (typically more than 6 months).
• High-Yield Clinical Concept: A client can have a verified, serious biological illness (e.g., stage IV cancer, severe coronary artery disease, rheumatoid arthritis) and still receive a valid diagnosis of Somatic Symptom Disorder if their psychological and behavioral response is grossly disproportionate, catastrophic, and incapacitating.

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2. Illness Anxiety Disorder (IAD)

Historically termed Hypochondriasis, Illness Anxiety Disorder is diagnosed when the primary disturbance is anxiety about health rather than the physical symptoms themselves.

• Diagnostic Criteria:
  1. Preoccupation with having or acquiring a serious, undiagnosed illness.
  2. Somatic symptoms are not present, or, if present, are only mild in intensity. If an actual medical condition is present or there is a high risk of developing one, the preoccupation is clearly excessive or disproportionate.
  3. High level of anxiety about health, and the individual is easily alarmed about personal health status.
  4. The individual performs excessive health-related behaviors (e.g., repeatedly checking their body for signs of illness) or exhibits maladaptive avoidance (e.g., avoids doctor appointments and hospitals).
  5. Duration: Illness preoccupation has been present for at least 6 months (though the specific feared illness may change over that period).
• Subtypes:
  • Care-Seeking Type: Frequent medical consultations, diagnostic imaging, and physician shopping.
  • Care-Avoidant Type: Medical care is strictly avoided due to unbearable anxiety regarding what tests might reveal.

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3. Conversion Disorder (Functional Neurological Symptom Disorder)

Conversion Disorder involves one or more symptoms of altered voluntary motor or sensory function that mimic a neurological or general medical condition.

• Diagnostic Criteria:
  1. One or more symptoms of altered voluntary motor or sensory function (e.g., weakness, non-epileptic seizures, blindness, numbness, difficulty swallowing, aphonia).
  2. Clinical findings provide clear evidence of incompatibility between the symptom and recognized neurological or medical conditions.
  3. Not better explained by another medical or mental disorder.
  4. Causes clinically significant distress or functional impairment.
• Objective Neurological Signs of Incompatibility (NCE Exam Vignettes):
  • Hoover's Sign: In functional lower extremity weakness, hip extension weakness normalizes when the clinician assesses contralateral hip flexion against resistance.
  • Psychogenic Non-Epileptic Seizures (PNES): Preserved consciousness, forced eye closure with resistance to eyelid opening, and absence of post-ictal confusion or epileptiform activity on EEG.
  • Tubular Visual Fields: Functional blindness exhibiting a constricted visual field that does not widen when the distance from the visual target increases (violating the laws of optics).
• Historical and Dynamic Concepts:
  • La Belle Indifférence: A surprising lack of concern or blunted emotional reactivity regarding the severity of the neurological deficit (e.g., cheerful unconcern while reporting total paraplegia). While classically tested on the NCE, modern research notes it is neither sensitive nor specific.
  • Primary Gain: The internal reduction of psychological conflict or anxiety achieved by converting unconscious emotional trauma into a physical symptom.
  • Secondary Gain: The tangible interpersonal or environmental advantages acquired through the illness (e.g., sympathy, attention, release from difficult responsibilities).

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4. Factitious Disorder vs. Malingering

Distinguishing Factitious Disorder from Malingering is one of the most frequently tested differential diagnostic concepts on the NCE.

Factitious Disorder

• Definition: Falsification of physical or psychological signs or symptoms, or induction of injury or disease, associated with identified deception. The individual presents themselves (or another) as ill, impaired, or injured.
• Motivation: Internal psychological gain. The primary motivation is the unconscious need to adopt the "sick role," receive nurturance, medical attention, and caregiver sympathy.
• Crucial Diagnostic Rule: The deceptive behavior is evident even in the absence of obvious external rewards.
• Two Types:
  1. Factitious Disorder Imposed on Self (historically termed Munchausen Syndrome): Feigning fever by heating thermometers, injecting insulin to induce hypoglycemia, adding blood to urine specimens.
  2. Factitious Disorder Imposed on Another (historically termed Munchausen Syndrome by Proxy): A perpetrator (usually a parent or caregiver) fabricates or induces illness in a dependent (typically a child or vulnerable elder).
     • MANDATORY ETHICAL/LEGAL OBLIGATION: Factitious Disorder Imposed on Another constitutes active, severe child abuse or elder abuse. The professional counselor has an immediate statutory mandate to report the suspicion to Child Protective Services (CPS) or Adult Protective Services (APS) without notifying or confronting the abusive caregiver.

Malingering

• Definition: The intentional production of false or grossly exaggerated physical or psychological symptoms motivated by external incentives / secondary gains.
• External Incentives: Evading criminal prosecution, obtaining financial compensation (disability payments, personal injury settlements), avoiding military duty, or obtaining prescription drugs.
• DSM-5-TR Classification: Malingering is NOT a mental disorder. It is classified as a V-code ("Other Conditions That May Be a Focus of Clinical Attention").
• When to Suspect Malingering: Medicolegal context (referred by an attorney), marked discrepancy between claimed disability and objective findings, lack of cooperation during diagnostic evaluation, and presence of Antisocial Personality Disorder traits.

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Differential Matrix: Somatic & Deceptive Presentations

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Dissociative Disorders

Dissociative disorders involve disruptions or breakdowns in memory, awareness, identity, perception, consciousness, or motor control. The primary etiology across dissociative disorders is severe, overwhelming childhood trauma (chronic physical, sexual, or emotional abuse), where dissociation functions as a neuroprotective survival defense.

1. Dissociative Amnesia

• Core Feature: An inability to recall important autobiographical information, usually of a traumatic or stressful nature, that is inconsistent with ordinary forgetting.
• Patterns of Amnesia:
  • Localized Amnesia: Failure to recall all events that occurred during a circumscribed period of time (the most common form; e.g., the hours surrounding an assault or combat event).
  • Selective Amnesia: The individual can recall some, but not all, events during a circumscribed period.
  • Generalized Amnesia: Complete loss of memory for one's entire life history and personal identity (rare; sudden onset).
  • Systematized Amnesia: Loss of memory for a specific category of information (e.g., all memories related to a specific family member).
  • Continuous Amnesia: Inability to recall events from a specific point in time up to and including the present (anterograde memory failure).
• Specifier: With Dissociative Fugue: Apparently purposeful travel or bewildered wandering that is associated with amnesia for one's identity or other autobiographical information.

2. Depersonalization / Derealization Disorder

• Depersonalization: Experiences of unreality, detachment, or being an outside observer with respect to one's thoughts, feelings, sensations, body, or actions (e.g., emotional or physical numbing, distorted sense of time, feeling like an automaton).
• Derealization: Experiences of unreality or detachment with respect to surroundings (e.g., individuals or objects are experienced as dreamlike, foggy, artificial, lifeless, or visually distorted).
• Critical Diagnostic Criterion: Reality testing remains intact during the episodes. The individual is fully aware that their perceptual experience is distorted (e.g., "I know my hands haven't actually shrunk, but they feel like they don't belong to me"). If reality testing is lost, the presentation is psychotic, not dissociative.

3. Dissociative Identity Disorder (DID)

• Core Feature: Disruption of identity characterized by two or more distinct personality states (historically referred to as "alters" or alternate identities). Involves marked discontinuity in sense of self and agency, accompanied by related alterations in affect, behavior, consciousness, memory, perception, and cognition.
• Amnesia Gaps: Recurrent gaps in the recall of everyday events, important personal information, and/or traumatic events that are inconsistent with ordinary forgetting.
• Etiology: Extreme, severe, chronic developmental trauma (typically before age 6, prior to unified ego consolidation).
• Phase-Oriented Treatment Model (Judith Herman / ISSTD):
  • Phase 1: Safety, symptom stabilization, affect regulation, and establishing internal communication between parts.
  • Phase 2: Processing and integrating traumatic memories across identities.
  • Phase 3: Identity integration, resolution, and functional collaboration/fusion.

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Sleep-Wake Disorders

1. Insomnia Disorder

• Criteria: Dissatisfaction with sleep quantity or quality associated with one or more: difficulty initiating sleep, difficulty maintaining sleep, or early-morning awakening with inability to return to sleep.
• Frequency & Duration: Occurs at least 3 nights per week for at least 3 months, despite adequate opportunity for sleep.
• First-Line Treatment: Cognitive Behavioral Therapy for Insomnia (CBT-I) is the empirical gold standard (superior to hypnotic medications in long-term efficacy and free of dependence risks).
  • Stimulus Control Therapy (Bootzin):
    • Go to bed only when sleepy.
    • Use the bed and bedroom only for sleep and sex (no reading, working, watching television, or using phones).
    • The 20-Minute Rule: If unable to fall asleep or return to sleep within 15–20 minutes, get out of bed, go to another room under dim lighting, engage in a quiet, non-stimulating activity, and return to bed only when sleepy.
    • Maintain a fixed wake-up time 7 days a week, regardless of sleep duration.
    • Avoid daytime naps.
  • Sleep Restriction Therapy: Restricting time in bed to match actual total sleep time, consolidating sleep efficiency (>85%), then gradually expanding time in bed by 15-minute increments.
  • Sleep Hygiene: Avoid caffeine after midday, avoid alcohol (which fragments sleep architecture and suppresses REM sleep), maintain a cool (65–68°F), dark, quiet bedroom, and eliminate screen blue light 1 hour prior to sleep.

2. Narcolepsy

• Criteria: Recurrent periods of an irrepressible need to sleep, lapsing into sleep, or napping occurring within the same day, at least 3 times per week over the past 3 months.
• Pathognomonic Features:
  • Cataplexy: Brief episodes (seconds to minutes) of sudden, bilateral loss of muscle tone with maintained consciousness, precipitated by intense emotions (typically laughter, humor, or surprise).
  • Hypocretin (Orexin) Deficiency: Autoimmune destruction of orexin-producing neurons in the lateral hypothalamus.
  • REM Intrusion Phenomena:
    • Hypnagogic Hallucinations: Vivid, dreamlike hallucinations occurring while falling asleep.
    • Hypnopompic Hallucinations: Vivid hallucinations occurring upon awakening.
    • Sleep Paralysis: Temporary inability to speak or move upon waking or falling asleep.

3. Breathing-Related Sleep Disorders

• Obstructive Sleep Apnea Hypopnea (OSAH): Repeated nocturnal collapse of the upper airway resulting in apneas (airflow cessation ≥10 seconds) or hypopneas, accompanied by loud snoring, gasping, morning headaches, and excessive daytime sleepiness (EDS). Diagnosed via polysomnography (Apnea-Hypopnea Index ≥5 with symptoms). First-line treatment is Continuous Positive Airway Pressure (CPAP).
• Central Sleep Apnea (CSA): Repeated apneas during sleep caused by variability in respiratory drive from the brainstem without physical airway obstruction.