Learning disorders US Medical PG Practice Questions and MCQs
Practice US Medical PG questions for Learning disorders. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
Learning disorders US Medical PG Question 1: A mother brings her 3-year-old son to the doctor because she is worried that he might be harming himself by constantly banging his head on the wall. He has been exhibiting this behavior for a few months. She is also worried because he has started to speak less than he used to and does not respond when his name is called. He seems aloof during playtime with other children and seems to have lost interest in most of his toys. What is the most likely diagnosis?
- A. Autism spectrum disorder (Correct Answer)
- B. Attention deficit hyperactivity disorder
- C. Generalized anxiety disorder
- D. Bipolar disorder
- E. Obsessive-compulsive disorder
Learning disorders Explanation: ***Autism spectrum disorder***
- The child's symptoms of **head banging** (a repetitive, self-stimulatory behavior), **decreased speech**, **lack of response to his name**, **social aloofness**, and **loss of interest in toys** are classic indicators of **Autism Spectrum Disorder (ASD)**.
- ASD involves persistent deficits in **social communication and interaction** across multiple contexts, as well as **restricted, repetitive patterns of behavior, interests, or activities**.
*Attention deficit hyperactivity disorder*
- **ADHD** is characterized primarily by **inattention, hyperactivity, and impulsivity**, which are not the prominent or primary concerns described in this case.
- While children with ADHD may have social difficulties, their core symptoms do not typically include severe **social aloofness, communication regression**, or **self-injurious repetitive behaviors** like head banging.
*Generalized anxiety disorder*
- **Generalized anxiety disorder (GAD)** in children typically presents with excessive worry about multiple events or activities, often accompanied by **physical symptoms of anxiety** such as restlessness, fatigue, and difficulty concentrating.
- It does not explain the **communication regression, social deficits**, or **stereotypical behaviors** like head banging observed in this child.
*Bipolar disorder*
- **Bipolar disorder** in children often manifests with severe mood dysregulation, including distinct periods of **elevated or irritable mood (mania/hypomania)** and depression.
- The symptoms described, such as social withdrawal and communication difficulties, are not characteristic of the primary presentations of bipolar disorder.
*Obsessive-compulsive disorder*
- **OCD** is characterized by the presence of **obsessions (recurrent, persistent thoughts, urges, or images)** and/or **compulsions (repetitive behaviors or mental acts)**.
- While head banging can be a repetitive behavior, the broader constellation of symptoms, including social and communication deficits, is not typical of primary OCD in young children.
Learning disorders US Medical PG Question 2: A 4-year-old boy is brought to the physician by his parents because of concerns about his behavior during the past year. His parents report that he often fails to answer when they call him and has regular unprovoked episodes of crying and screaming. At kindergarten, he can follow and participate in group activities, but does not follow his teacher's instructions when these are given to him directly. He is otherwise cheerful and maintains eye contact when spoken to but does not respond when engaged in play. He gets along well with friends and family. He started walking at the age of 11 months and can speak in two-to-three-word phrases. He often mispronounces words. Which of the following is the most likely diagnosis?
- A. Selective mutism
- B. Hearing impairment (Correct Answer)
- C. Conduct disorder
- D. Specific-learning disorder
- E. Autistic spectrum disorder
Learning disorders Explanation: ***Hearing impairment***
- The child's inconsistent response to being called, failure to follow direct instructions, and unprovoked crying and screaming, despite maintaining eye contact and having normal social interactions, are all suggestive of a **hearing impairment**.
- His delayed and unusual speech patterns (two-to-three-word phrases, mispronouncing words) for his age further points to **auditory processing difficulties** due to hearing loss.
*Selective mutism*
- This condition involves a consistent failure to speak in specific social situations where speaking is expected, despite speaking in other situations. The child's issue is with comprehending and responding to speech, not with speaking itself.
- The behavior observed (not responding to calls or direct instructions) is more indicative of an inability to hear rather than a choice not to speak.
*Conduct disorder*
- Conduct disorder is characterized by a persistent pattern of behavior that violates the rights of others and major societal norms appropriate for the individual's age.
- The child's symptoms do not include aggression, destruction of property, deceitfulness, or serious rule violations and he gets along well with friends and family.
*Specific-learning disorder*
- A specific learning disorder involves difficulties with academic skills, despite normal intelligence. While he has speech difficulties, he can participate in group activities, and there is no information about his academic performance.
- The primary concern here is his inability to respond to auditory input, which precedes and likely causes any potential learning difficulties rather than being a learning disorder itself.
*Autistic spectrum disorder*
- Autism spectrum disorder is characterized by persistent deficits in social communication and social interaction across multiple contexts, and restricted, repetitive patterns of behavior, interests, or activities.
- This child maintains eye contact, is cheerful, gets along well with friends and family, and can participate in group activities, which argues against significant **social communication deficits** typical of autism.
Learning disorders US Medical PG Question 3: A 4-year-old boy is brought to the physician because of non-fluent speech. His mother worries that his vocabulary is limited for his age and because he cannot use simple sentences to communicate. She says he enjoys playing with his peers and parents, but he has always lagged behind in his speaking and communication. His speech is frequently not understood by strangers. He physically appears normal. His height and weight are within the normal range for his age. He responds to his name, makes eye contact, and enjoys the company of his mother. Which of the following is the most appropriate next step in management?
- A. Referral to speech therapist
- B. Evaluate response to methylphenidate
- C. Psychiatric evaluation
- D. Audiology testing (Correct Answer)
- E. Thyroid-stimulating hormone
Learning disorders Explanation: ***Audiology testing***
- Before initiating any therapy for speech delay, it is crucial to rule out **hearing impairment**, as **undiagnosed hearing loss** is the most common organic cause of speech and language difficulties in children.
- **Standard practice guidelines** (AAP) recommend hearing assessment as the **first diagnostic step** in evaluating any child with speech or language delay.
- While other developmental aspects seem intact, the inability to use simple sentences at age 4 and speech that is "frequently not understood by strangers" strongly suggests the need to assess the child's ability to **receive auditory information**.
*Referral to speech therapist*
- While a **speech therapist referral** is highly appropriate for a child with significant speech delay, it should typically follow an assessment to rule out underlying organic causes like **hearing loss**.
- Without addressing potential hearing impairment, speech therapy may be less effective or miss the root cause of the communication difficulty.
*Evaluate response to methylphenidate*
- **Methylphenidate** is a stimulant medication used primarily for **attention-deficit/hyperactivity disorder (ADHD)**.
- There is no indication of ADHD symptoms in this child (e.g., inattention, hyperactivity, impulsivity), and it is not a treatment for **primary speech delay**.
*Psychiatric evaluation*
- The child's ability to respond to his name, make eye contact, and enjoy social interaction with family and peers makes a **primary psychiatric disorder** (like autism spectrum disorder) less likely to be the sole cause of the speech delay.
- Such an evaluation would typically be considered if **social communication deficits**, repetitive behaviors, or restricted interests were prominent.
*Thyroid-stimulating hormone*
- **Hypothyroidism** can cause developmental delays, including speech delay.
- However, the child's normal physical appearance, height, and weight make **congenital or acquired hypothyroidism** less likely to be the primary cause of his isolated speech delay.
Learning disorders US Medical PG Question 4: A 9-year-old boy is brought to a pediatric psychologist by his mother because of poor academic performance. The patient’s mother mentions that his academic performance was excellent in kindergarten and first grade, but his second and third-grade teachers complain that he is extremely talkative, does not complete schoolwork, and frequently makes careless mistakes. They also complain that he frequently looks at other students or outside the window during the class and is often lost during the lessons. At home, he is very talkative and disorganized. When the pediatrician asks the boy his name, he replies promptly. He was born at full term by spontaneous vaginal delivery. He is up-to-date on all vaccinations and has met all developmental milestones on time. A recent IQ test scored him at 95. His physical examination is completely normal. When he is asked to read from an age-appropriate children’s book, he reads it fluently and correctly. Which of the following is the most likely diagnosis in this patient?
- A. Intellectual disability
- B. Autism spectrum disorder
- C. Dyslexia
- D. Persistent depressive disorder
- E. Attention-deficit/hyperactivity disorder (Correct Answer)
Learning disorders Explanation: **Attention-deficit/hyperactivity disorder**
* The child's symptoms of being **extremely talkative**, not completing schoolwork, making **careless mistakes**, and being easily distracted and disorganized are classic signs of **ADHD (Attention-deficit/hyperactivity disorder)**.
* His normal IQ, early developmental milestones, and reading fluency rule out other neurological or intellectual disabilities, while his persistent inattention and hyperactivity across settings support ADHD.
* *Intellectual disability*
* **Intellectual disability** is characterized by significant limitations in both intellectual functioning (IQ below 70) and adaptive behavior, which is contradicted by this patient's **IQ of 95** and normal developmental milestones.
* Patients with intellectual disability would typically struggle with academic performance from the start and would not have had "excellent" performance in kindergarten and first grade.
* *Autism spectrum disorder*
* **Autism spectrum disorder** involves persistent deficits in **social communication and interaction** and **restricted, repetitive patterns of behavior, interests, or activities**. This child's prompt response to his name and ability to read fluently do not align with common autistic features.
* While some social difficulties might arise from inattention, the primary symptoms do not point to core deficits in social reciprocity or communication typical of ASD.
* *Dyslexia*
* **Dyslexia** is a **specific learning disorder** primarily characterized by difficulties with **accurate and/or fluent word recognition, poor decoding, and poor spelling abilities**, despite normal intelligence.
* This patient can **read fluently and correctly from an age-appropriate children’s book**, making dyslexia an unlikely diagnosis.
* *Persistent depressive disorder*
* **Persistent depressive disorder** (dysthymia) involves a **chronically depressed mood** for at least one year in children and adolescents, often accompanied by symptoms such as low energy, poor concentration, sleep disturbance, and feelings of hopelessness.
* While poor academic performance and some difficulty concentrating could be present, the prominent symptoms of **hyperactivity** (talkativeness) and impulsivity (careless mistakes) are not typical features of depression, and a depressed mood is not reported.
Learning disorders US Medical PG Question 5: A 6-year-old boy presents to the pediatrician with his parents. He is fully vaccinated and met most developmental milestones. His fine motor milestones are delayed; at present, he cannot eat by himself and has difficulty in self-dressing. His intelligence quotient (IQ) is 65. He listens quietly while spoken to and engages in play with his classmates. He neither talks excessively nor remains mute, but engages in normal social conversation. There is no history of seizures and he is not on any long-term medical treatment. On his physical examination, his vital signs are stable. His height and weight are normal for his age and sex, but his occipitofrontal circumference is less than the 3rd percentile for his age and sex. His neurologic examination is also normal. Which of the following is the most likely diagnosis?
- A. Attention deficit hyperactivity disorder
- B. Autism
- C. Intellectual disability (Correct Answer)
- D. Obsessive-compulsive disorder
- E. Tic disorder
Learning disorders Explanation: ***Intellectual disability***
- The boy's **IQ of 65** falls below the diagnostic threshold of 70 for intellectual disability, and he exhibits **adaptive deficits** in fine motor skills (difficulty eating and dressing) and **developmental delays**.
- His **microcephaly (occipitofrontal circumference less than 3rd percentile)** is also associated with certain forms of intellectual disability, further supporting this diagnosis.
*Attention deficit hyperactivity disorder*
- This condition is characterized by **inattention, hyperactivity, and impulsivity**, none of which are prominently described in the boy's presentation (he listens quietly and engages in normal conversation).
- While academic difficulties might occur, **significant adaptive and intellectual delays** as described are not typical primary features of ADHD.
*Autism*
- Autism spectrum disorder involves persistent deficits in **social communication and interaction** and **restricted, repetitive patterns of behavior, interests, or activities**.
- The boy's ability to engage in "normal social conversation" and play with classmates, along with an absence of repetitive behaviors or restricted interests, makes autism less likely.
*Obsessive-compulsive disorder*
- OCD is characterized by the presence of **obsessions (recurrent, persistent thoughts, urges, or images)** and/or **compulsions (repetitive behaviors or mental acts)**.
- The boy's symptoms do not include any mention of obsessions or compulsions.
*Tic disorder*
- Tic disorders involve **sudden, rapid, recurrent, nonrhythmic motor movements or vocalizations**.
- There is no mention of tics in the boy's presentation, making this diagnosis unlikely.
Learning disorders US Medical PG Question 6: A 4-year-old boy is brought to a pediatrician by his parents for a consultation after his teacher complained about his inability to focus or make friends at school. They mention that the boy does not interact well with others at home, school, or daycare. On physical examination, his vital signs are stable with normal weight, height, and head circumference for his age and sex. His general examination and neurologic examination are completely normal. A recent audiological evaluation shows normal hearing, and intellectual disability has been ruled out by a clinical psychologist. Which of the following investigations is indicated as part of his diagnostic evaluation at present?
- A. Magnetic resonance imaging (MRI) of brain
- B. Electroencephalography
- C. No further testing is needed
- D. Positron Emission Tomography (PET) scanning of head
- E. Autism spectrum disorder screening and developmental assessment (Correct Answer)
Learning disorders Explanation: ***Autism spectrum disorder screening and developmental assessment***
- The clinical presentation (inability to focus, difficulty making friends, poor social interaction across multiple settings) is **highly suggestive of Autism Spectrum Disorder (ASD)**.
- After ruling out **hearing impairment and intellectual disability**, the next appropriate step is **formal ASD screening using validated tools** such as the **Modified Checklist for Autism in Toddlers (M-CHAT)**, **Autism Diagnostic Observation Schedule (ADOS)**, or **Autism Diagnostic Interview-Revised (ADI-R)**.
- According to **AAP guidelines**, when developmental concerns suggestive of ASD are identified, formal screening and comprehensive developmental assessment are **essential components of the diagnostic evaluation**.
- ASD diagnosis is primarily **clinical**, based on standardized screening tools and developmental assessments, not neuroimaging or electrophysiological studies.
*No further testing is needed*
- This is **incorrect** because the patient has not yet undergone **formal ASD-specific screening and developmental assessment**.
- While hearing and intellectual disability have been ruled out, **diagnostic confirmation of ASD** requires structured evaluation using validated assessment tools.
- Simply observing symptoms without formal screening is inadequate for establishing an ASD diagnosis.
*Magnetic resonance imaging (MRI) of brain*
- Brain MRI is **not routinely indicated** for ASD diagnosis as it typically shows **normal findings** in children with ASD.
- Neuroimaging is reserved for cases with **focal neurological signs, regression, or atypical features** suggesting structural abnormalities.
- This patient has a **normal neurological examination**, making MRI unnecessary.
*Electroencephalography*
- EEG is indicated only when there is suspicion of **seizure disorder** or other specific neurological conditions.
- The patient has a **normal neurological examination** with no seizure-like symptoms, making EEG unnecessary at this stage.
*Positron Emission Tomography (PET) scanning of head*
- PET scans are **not part of routine ASD diagnostic workup** and are typically used in research settings or for evaluating specific metabolic or neoplastic conditions.
- The **radiation exposure and invasiveness** make PET scanning inappropriate for initial diagnostic evaluation in a child with developmental concerns.
Learning disorders US Medical PG Question 7: A 3-year-old girl is brought to the physician for a well-child examination. She was born at term and has been healthy since. She can climb up and down the stairs and can pedal a tricycle. She has difficulty using a spoon to feed herself but can copy a line. She speaks in 2- to 3-word sentences that can be understood by most people. She is selfish while playing with children her age and throws tantrums quite often. She cannot put on her own shoes and socks. She does not tolerate separation from her parents. She is at 60th percentile for height and weight. Physical examination including neurologic examination reveals no abnormalities. Which of the following is the most appropriate assessment of her development?
- A. Fine motor: Normal | Gross motor: Normal | Language: Delayed | Social skills: Delayed
- B. Fine motor: Delayed | Gross motor: Delayed | Language: Normal | Social skills: Normal
- C. Fine motor: Delayed | Gross motor: Normal | Language: Normal | Social skills: Delayed (Correct Answer)
- D. Fine motor: Normal | Gross motor: Delayed | Language: Normal | Social skills: Delayed
- E. Fine motor: Normal | Gross motor: Delayed | Language: Delayed | Social skills: Normal
Learning disorders Explanation: ***Fine motor: Delayed | Gross motor: Normal | Language: Normal | Social skills: Delayed***
- The child can copy a line (expected at 3 years) and climb stairs and pedal a tricycle (expected for a 3-year-old), indicating **normal gross motor skills**. However, difficulty using a spoon and putting on shoes/socks suggests **delayed fine motor skills**.
- Speaking in 2- to 3-word sentences understood by most (expected for 2-3 years) indicates **normal language development**. Being selfish and throwing tantrums (normal for 2-3 years) but not tolerating separation (suggests earlier developmental stage for separation anxiety) point to **delayed social skills**.
*Fine motor: Normal | Gross motor: Normal | Language: Delayed | Social skills: Delayed*
- This option incorrectly assesses fine motor skills as normal when the child struggles with tasks like using a spoon and dressing herself.
- While language and social skills are correctly identified as delayed, the overall assessment of fine motor makes this option incorrect.
*Fine motor: Delayed | Gross motor: Delayed | Language: Normal | Social skills: Normal*
- This option incorrectly assesses gross motor skills as delayed, despite the child's ability to climb stairs and pedal a tricycle, which are age-appropriate.
- It also incorrectly assesses social skills as normal, overlooking the persistent separation anxiety and aggressive social play for her age.
*Fine motor: Normal | Gross motor: Delayed | Language: Normal | Social skills: Delayed*
- This option incorrectly describes fine motor skills as normal and gross motor skills as delayed.
- Her ability to pedal a tricycle and climb stairs indicates age-appropriate gross motor development, while her difficulty with a spoon suggests delayed fine motor skills.
*Fine motor: Normal | Gross motor: Delayed | Language: Delayed | Social skills: Normal*
- This option incorrectly states that both fine motor and gross motor skills are affected and also mischaracterizes social skills as normal.
- The child's language development is within the normal range for a 3-year-old, and her social behavior, particularly the separation anxiety, indicates a delay.
Learning disorders US Medical PG Question 8: Which of the following features is NOT typically associated with Fragile X syndrome?
- A. Enlarged testes
- B. Prominent facial features
- C. Small ears (Correct Answer)
- D. Intellectual disability
- E. Microcephaly
Learning disorders Explanation: ***Small ears***
- **Small ears** are not a typical feature of Fragile X syndrome; individuals often have **large, prominent ears**.
- This question asks for the feature *not* typically associated with the syndrome.
*Intellectual disability*
- **Intellectual disability**, particularly in males, is the most common and defining feature of Fragile X syndrome.
- It usually ranges from **mild to severe**, affecting cognitive function and adaptive skills.
*Enlarged testes*
- **Macroorchidism** (enlarged testes) is a characteristic physical finding in postpubertal males with Fragile X syndrome.
- This symptom becomes apparent after puberty and is an important diagnostic clue.
*Prominent facial features*
- **Prominent facial features** are typical, including a **long face**, **prominent jaw (prognathism)**, and **large, prominent ears**.
- These features become more noticeable with age.
*Microcephaly*
- **Microcephaly** (abnormally small head) is not typically associated with Fragile X syndrome.
- Individuals with Fragile X generally have **normal or slightly increased head circumference**, not microcephaly.
Learning disorders US Medical PG Question 9: True about Fragile X syndrome is
- A. 10% Female carriers mentally retarded
- B. Males have IQ 20-40 (Correct Answer)
- C. Triple nucleotide CAG Sequence mutation
- D. Gain of function mutation
- E. Autosomal dominant inheritance pattern
Learning disorders Explanation: ***Males have IQ 20-40***
- **Fragile X syndrome** is a significant cause of inherited intellectual disability, and affected males typically present with moderate to severe intellectual impairment, corresponding to an **IQ range of 20-60**, with many in the **20-40 range**.
- This intellectual deficit is a hallmark of the syndrome in males due to the nearly complete loss of **FMRP protein**.
*10% Female carriers mentally retarded*
- While some **female carriers** of Fragile X syndrome may experience mild intellectual deficits or learning challenges, the proportion is significantly higher than 10%, with estimates often around **30-50%** showing some intellectual or significant learning disability.
- Many female carriers are cognitively normal, but those affected typically demonstrate **milder symptoms** than males.
*Triple nucleotide CAG Sequence mutation*
- Fragile X syndrome is caused by an expansion of a **CGG triplet repeat** in the *FMR1* gene, not CAG.
- The expansion of **CGG repeats** (>200 repeats in full mutation) leads to hypermethylation and silencing of the *FMR1* gene, reducing or eliminating the production of **Fragile X Mental Retardation Protein (FMRP)**.
*Gain of function mutation*
- Fragile X syndrome is caused by a **loss-of-function mutation** due to the silencing of the *FMR1* gene.
- The lack of **FMRP** (Fragile X Mental Retardation Protein) leads to synaptic dysfunction and the characteristic features of the syndrome.
*Autosomal dominant inheritance pattern*
- Fragile X syndrome follows an **X-linked dominant** inheritance pattern, not autosomal dominant.
- Males are more severely affected because they have only one X chromosome, while females have two X chromosomes and often show milder symptoms due to X-inactivation and mosaicism.
Learning disorders US Medical PG Question 10: A 4-year-old boy presents with language delay, toe-walking, hand-flapping, and intense interest in trains. He makes poor eye contact but occasionally engages in joint attention with his mother when looking at trains. He has sensory sensitivities to loud noises. He can identify all letters and numbers but cannot have reciprocal conversations. His Childhood Autism Rating Scale (CARS) score is borderline. His parents request your opinion on diagnosis and intervention priorities given diagnostic uncertainty and limited early intervention resources in their area.
- A. Presume autism spectrum disorder and implement evidence-based early interventions while monitoring (Correct Answer)
- B. Diagnose autism spectrum disorder and begin comprehensive ABA therapy immediately
- C. Diagnose language disorder and focus resources on communication training
- D. Refer to genetics for testing before committing to diagnosis or intervention
- E. Delay diagnosis pending further developmental assessment and prioritize speech therapy
Learning disorders Explanation: ***Presume autism spectrum disorder and implement evidence-based early interventions while monitoring***
- The clinical presentation of **stereotyped behaviors** (hand-flapping, toe-walking), **restricted interests** (trains), and **social communication deficits** warrants early intervention during the critical **neuroplastic window** (ages 2-5).
- Given the diagnostic uncertainty and limited resources, a **provisional diagnosis** ensures the child receives broad-based support for functional deficits while longitudinal monitoring clarifies the diagnosis.
*Diagnose autism spectrum disorder and begin comprehensive ABA therapy immediately*
- While ASD is highly likely, a definitive diagnosis may be premature given the **borderline CARS score** and elements of **joint attention** that require further assessment.
- Immediate **comprehensive ABA therapy** might be resource-intensive and may not be the only or most appropriate option in an area with limited early intervention resources.
*Diagnose language disorder and focus resources on communication training*
- A **language disorder** diagnosis ignores the significant **repetitive behaviors**, **sensory sensitivities**, and **restricted interests** characteristic of ASD.
- Focusing solely on communication training fails to address the child's **social-emotional** and **behavioral needs**, which are central to his presentation.
*Refer to genetics for testing before committing to diagnosis or intervention*
- While **genetic testing** (e.g., chromosomal microarray) is recommended for ASD workups, it should not cause a **delay in starting intervention**.
- Genetic results rarely change the immediate **behavioral or developmental management** plan required for the child's daily functioning.
*Delay diagnosis pending further developmental assessment and prioritize speech therapy*
- Delaying diagnosis and intervention until further assessment can lead to the loss of valuable time during a peak period of **brain development**.
- Prioritizing **speech therapy** alone is insufficient because it does not address the **social reciprocity** and **sensory processing issues** evident in this patient.
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