Sleep-Wake Disorders — MCQs

Sleep-Wake Disorders Indian Medical PG Practice Questions and MCQs

Question 61: The term 'frigidity' (though outdated) traditionally refers to:

A. Inability to conceive with a particular male
B. Ejaculation occurring immediately after penetration
C. Inability to initiate sexual arousal in male
D. Inability to initiate sexual arousal in female (Correct Answer)

Explanation: ***Inability to initiate sexual arousal in female*** - The term "frigidity," though now considered **outdated and pejorative**, traditionally referred to a woman's inability to experience **sexual arousal** or pleasure. - This term encompassed various forms of female sexual dysfunction, including **anorgasmia** and **hypoactive sexual desire disorder**, which are now described with greater precision. *Inability to conceive with a particular male* - This describes **infertility** or **subfertility**, which is a distinct medical condition related to reproductive capacity, not sexual pleasure or arousal. - While sexual activity is necessary for conception, the inability to conceive does not inherently mean a lack of sexual arousal or desire. *Ejaculation occurring immediately after penetration* - This describes **premature ejaculation**, a male sexual dysfunction characterized by rapid orgasm and ejaculation, typically before, during, or shortly after penetration. - This term is relevant to male sexual function and not to female sexual arousal. *Inability to initiate sexual arousal in male* - This condition is known as **erectile dysfunction** (ED) or **male hypoactive sexual desire disorder**, referring to a man's inability to achieve or maintain an erection or lack of sexual desire. - The term "frigidity" was specifically and historically applied to female sexual difficulties, not male ones.

Question 62: Classic tetrad of narcolepsy includes all, except:

A. Catalepsy (Correct Answer)
B. Hypnagogic hallucination
C. Sleep paralysis
D. Sleep attacks

Explanation: ***Catalepsy*** - Catalepsy refers to a **waxy flexibility** and maintenance of postures seen in **catatonia** (a psychiatric condition). - It is **NOT** part of the classic tetrad of narcolepsy. - The classic tetrad includes **cataplexy** (not catalepsy), which is sudden muscle weakness triggered by strong emotions, along with excessive daytime sleepiness, sleep paralysis, and hypnagogic/hypnopompic hallucinations. *Hypnagogic hallucination* - Vivid, often frightening, dream-like experiences that occur while **falling asleep** (hypnagogic) or upon awakening (hypnopompic). - This is a recognized component of the **classic tetrad of narcolepsy**. *Sleep paralysis* - Temporary inability to move or speak upon **waking up or falling asleep**. - One of the four key symptoms forming the **classic tetrad of narcolepsy**. *Sleep attacks* - Sudden, irresistible urges to sleep that can occur at any time, often without warning. - **Excessive daytime sleepiness** leading to these attacks is a core feature and part of the **classic tetrad of narcolepsy**.

Question 63: A 65-year-old woman presents with difficulty falling asleep and frequent awakenings. What is the most appropriate first-line treatment?

A. Cognitive-behavioral therapy for insomnia (Correct Answer)
B. Antipsychotics
C. Benzodiazepines
D. Melatonin

Explanation: ***Cognitive-behavioral therapy for insomnia (CBT-I)*** - **CBT-I** is considered the **first-line treatment** for chronic insomnia, as it addresses the underlying thoughts and behaviors contributing to sleep difficulties. - It involves techniques such as **sleep restriction**, **stimulus control**, and cognitive restructuring, with proven long-term efficacy and fewer side effects than medication. *Benzodiazepines* - While effective for short-term insomnia relief, **benzodiazepines** are generally not recommended as first-line due to risks of **dependence**, **tolerance**, and side effects, especially in older adults. - They can worsen sleep architecture, cause **daytime sedation**, and increase the risk of falls in the elderly. *Antipsychotics* - **Antipsychotics** are not indicated for primary insomnia and carry significant risks of **metabolic side effects**, **sedation**, and **extrapyramidal symptoms**. - Their use for insomnia is off-label and reserved for specific psychiatric conditions where insomnia is a comorbidity. *Melatonin* - **Melatonin** can be helpful for specific sleep disorders like **jet lag** or **circadian rhythm sleep-wake disorders**, but its efficacy for chronic insomnia is limited and inconsistent. - While generally safe, it is not as robust or comprehensive in addressing the behavioral and cognitive components of insomnia as CBT-I.

Question 64: A patient presents with severe daytime sleepiness, cataplexy, and hallucinations while falling asleep. What is the most likely diagnosis?

A. Sleep apnea
B. Insomnia
C. Narcolepsy (Correct Answer)
D. Restless legs syndrome

Explanation: ***Correct Option: Narcolepsy*** - The classic triad of symptoms—**excessive daytime sleepiness**, **cataplexy** (sudden loss of muscle tone triggered by strong emotions), and **hypnagogic/hypnopompic hallucinations** (hallucinations while falling asleep or waking up)—is highly characteristic of narcolepsy. - These symptoms result from a dysfunction in the brain's sleep-wake cycles, often due to a deficiency in **hypocretin/orexin** neurons in the lateral hypothalamus. - Narcolepsy type 1 specifically includes cataplexy, while narcolepsy type 2 lacks this feature. *Incorrect Option: Sleep apnea* - While it causes **excessive daytime sleepiness**, it typically lacks **cataplexy** and the vivid hallucinations associated with narcolepsy. - Patients often present with **snoring**, **witnessed breathing pauses**, and **fragmented sleep** due to repeated upper airway obstruction. - Diagnosed via polysomnography showing apnea-hypopnea index (AHI) ≥5. *Incorrect Option: Insomnia* - Characterized by difficulty falling or staying asleep, leading to **daytime fatigue**, but not typically associated with sudden sleep attacks, cataplexy, or vivid dream-like hallucinations. - It involves a lack of sufficient sleep quantity or quality, whereas narcolepsy involves issues with **sleep-wake regulation** and REM intrusion into wakefulness. *Incorrect Option: Restless legs syndrome* - Involves an **irresistible urge to move the legs**, often accompanied by uncomfortable sensations (paresthesias), typically worse in the evening or at rest, and relieved by movement. - While it can disrupt sleep and cause some daytime grogginess, it does not feature **cataplexy** or the specific types of hallucinations seen in narcolepsy. - Associated with dopaminergic dysfunction and often iron deficiency.

Question 65: A 30-year-old woman complains of difficulty falling asleep and frequent awakenings at night for the past 3 months. She feels tired during the day. What is the most likely diagnosis?

A. Sleep apnea
B. Insomnia (Correct Answer)
C. Narcolepsy
D. Restless leg syndrome

Explanation: ***Insomnia*** - Chronic difficulty **falling asleep**, **staying asleep**, or **early morning awakening** leading to daytime impairment for at least **3 months** is the hallmark of insomnia. - The patient's presentation of difficulty falling asleep, frequent awakenings, and daytime tiredness perfectly aligns with the diagnostic criteria for insomnia. *Sleep apnea* - Characterized by recurrent episodes of **upper airway obstruction** during sleep, typically leading to **loud snoring**, gasping, and daytime sleepiness. - While it causes daytime tiredness and fragmented sleep, the primary complaint here is difficulty initiating and maintaining sleep, without mention of typical obstructive breathing symptoms. *Narcolepsy* - A chronic neurological condition defined by **irresistible daytime sleep attacks** and often accompanied by **cataplexy** (sudden muscle weakness triggered by strong emotions). - The patient's symptoms are of difficulty sleeping at night, not overwhelming daytime sleepiness and sleep attacks. *Restless leg syndrome* - Involves an **unpleasant sensation** in the legs, typically occurring in the evening or night, that creates an **uncontrollable urge to move them**. - While it can interfere with sleep onset, the primary complaint is not a specific unpleasant leg sensation but rather general difficulty falling and staying asleep.

Question 66: Which sleep disorder is characterized by difficulty in initiating or maintaining sleep, or waking up too early and being unable to return to sleep?

A. Narcolepsy
B. Sleep Apnea
C. Insomnia (Correct Answer)
D. Restless Legs Syndrome

Explanation: ***Insomnia*** - This disorder is defined precisely by persistent difficulty with **sleep initiation**, **sleep maintenance**, or **early morning awakening** with an inability to return to sleep. - These sleep disturbances lead to **significant distress** or impairment in daily functioning. *Narcolepsy* - Characterized by **overwhelming daytime sleepiness** and sudden attacks of sleep, often accompanied by **cataplexy**. - The primary issue is not difficulty initiating or maintaining night-time sleep, but rather an uncontrollable urge to sleep during the day. *Sleep Apnea* - Involves **repeated episodes of breathing cessation** or shallow breathing during sleep, leading to fragmented sleep and daytime fatigue. - The direct problem is not the inability to fall or stay asleep, but rather the disruption caused by breathing difficulties, though it can indirectly affect sleep maintenance. *Restless Legs Syndrome* - Characterized by an **uncontrollable urge to move the legs**, typically worse in the evening or night, and relieved by movement. - While it can interfere with **sleep initiation** due to discomfort, its defining feature is sensory and motor rather than primary difficulty with the sleep process itself.

Question 67: A 35-year-old man experiences recurrent awakenings from sleep due to frightening dreams, often involving themes of danger or threat. What is the most likely diagnosis?

A. Nightmare disorder (Correct Answer)
B. Sleep terror disorder
C. Insomnia disorder
D. Obstructive sleep apnea

Explanation: ***Nightmare disorder*** - Characterized by **recurrent awakenings** from sleep with detailed recall of **frightening dreams**, often involving threats to survival, security, or self-esteem - Individuals typically become **fully alert** and oriented shortly after awakening and can vividly describe the dream content - Dreams occur predominantly during **REM sleep**, usually in the second half of the night *Sleep terror disorder* - Involves abrupt awakenings from sleep with a panicky scream or cry, accompanied by signs of intense fear like **tachycardia** and **tachypnea** - Individuals are typically **unresponsive to comfort** and have **no recall of the event** or any dream content afterward - Occurs during **non-REM sleep** (Stage 3-4), typically in the first third of the night *Insomnia disorder* - Defined by persistent difficulty with **sleep initiation**, **duration**, **consolidation**, or **quality**, resulting in impaired daytime functioning - While it can involve awakenings, the primary feature is difficulty sleeping, not recurrent frightening dreams that lead to awakenings *Obstructive sleep apnea* - Characterized by **recurrent episodes of upper airway collapse** during sleep, leading to reduced or absent airflow despite respiratory effort - Symptoms include **loud snoring**, observed breathing pauses, and **daytime sleepiness**, but the primary issue is not frightening dreams

Question 68: In which phase of the sexual response cycle does premature ejaculation typically occur?

A. Excitement phase
B. Resolution
C. Plateau phase
D. Climax phase (Correct Answer)

Explanation: ***Climax phase*** - **Premature ejaculation** is defined as ejaculation occurring too quickly, often before or shortly after penetration, which corresponds to the point of orgasm or climax. - The climax phase is characterized by the peak of sexual pleasure and the release of sexual tension through orgasm and ejaculation. *Excitement phase* - This phase involves arousal and the initial physiological changes, such as **penile erection** and **vaginal lubrication**, but typically does not involve ejaculation. - Ejaculation during the excitement phase would be exceptionally rapid and considered a severe form of premature ejaculation. *Plateau phase* - The **plateau phase** is the period leading up to orgasm, where sexual tension becomes highly intensified but has not yet culminated in ejaculation. - While ejaculation *can* occur during this phase in cases of premature ejaculation, it is most definitively categorized as occurring by the time the climax is reached. *Resolution* - The **resolution phase** occurs after orgasm and ejaculation, where the body returns to its pre-aroused state, making it impossible for premature ejaculation to occur during this period. - This phase is characterized by a refractory period in males.

Question 69: Which of the following statements about narcolepsy is false?

A. Day dreaming (Correct Answer)
B. Cataplexy
C. Sudden sleep and decreased REM latency
D. Hypnagogic hallucinations

Explanation: ***Day dreaming*** - While people with narcolepsy experience excessive daytime sleepiness, **daydreaming** is a normal cognitive process and not a characteristic symptom of narcolepsy. - Narcolepsy involves **irresistible urges to sleep** or sudden sleep attacks, which are distinct from simply daydreaming. *Hypnagogic hallucinations* - These are **vivid, often frightening hallucinations** that occur as a person is falling asleep. - They are a common symptom of narcolepsy, along with hypnopompic hallucinations (occurring upon waking). *Cataplexy* - **Cataplexy** is a sudden, brief loss of voluntary muscle tone, often triggered by strong emotions like laughter or anger. - It is a hallmark symptom of **Type 1 narcolepsy** and is caused by the intrusion of REM sleep atonia into wakefulness. *Sudden sleep and decreased REM latency* - Individuals with narcolepsy experience **sudden and irresistible sleep attacks** during the day. - They also have **decreased REM latency**, meaning they enter REM sleep much faster than usual, often within minutes of falling asleep.

Question 70: A middle-aged man complains of very early ejaculation during intercourse. What is the non-pharmacological management that can be advised to the patient?

A. Cognitive behavioral therapy
B. Exposure and response prevention therapy
C. Squeeze technique (Correct Answer)
D. Sensate focus therapy

Explanation: ***Squeeze technique*** - The **squeeze technique** is a widely recommended specific behavioral technique for **premature ejaculation**, where the glans penis is squeezed firmly for several seconds just before ejaculation to reduce arousal and delay climax. - Developed by **Masters and Johnson**, this method helps the man recognize and **control the sensation** leading to orgasm, improving ejaculatory control over time. - This is a **direct, technique-focused approach** specifically targeting ejaculatory timing. *Cognitive behavioral therapy* - **Cognitive behavioral therapy (CBT)** primarily targets negative thought patterns and behaviors associated with conditions like depression, anxiety, or psychological issues contributing to sexual dysfunction. - While CBT can address **performance anxiety** related to premature ejaculation, it's not the primary specific technique for teaching ejaculatory control. *Exposure and response prevention therapy* - **Exposure and response prevention (ERP) therapy** is specifically used for **obsessive-compulsive disorder (OCD)**, involving confronting feared situations without engaging in compulsive behaviors. - This technique is **not applicable** to managing premature ejaculation. *Sensate focus therapy* - **Sensate focus therapy** is a comprehensive behavioral approach for sexual dysfunction that includes **non-demand touching**, gradual progression of intimacy, and can incorporate techniques like squeeze or stop-start methods. - While this is also a **valid non-pharmacological treatment** for premature ejaculation, the question asks for a specific technique, making the **squeeze technique** the more direct answer as it specifically targets ejaculatory control rather than being a broader therapeutic approach.

Practice by Chapter

Normal Sleep Physiology

Practice Questions

Insomnia Disorder

Practice Questions

Hypersomnolence Disorders

Practice Questions

Narcolepsy

Practice Questions

Breathing-Related Sleep Disorders

Practice Questions

Circadian Rhythm Sleep-Wake Disorders

Practice Questions

Parasomnias

Practice Questions

Sleep-Related Movement Disorders

Practice Questions

Sleep Disorders in Psychiatric Conditions

Practice Questions

Pharmacotherapy for Sleep Disorders

Practice Questions

Cognitive-Behavioral Therapy for Insomnia

Practice Questions

Sleep Hygiene and Other Non-pharmacological Approaches

Practice Questions

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