Dementia: Alzheimer's Type Indian Medical PG Practice Questions and MCQs
Practice Indian Medical PG questions for Dementia: Alzheimer's Type. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
Dementia: Alzheimer's Type Indian Medical PG Question 1: Which of the following is the most prominent clinical characteristic of Alzheimer's disease?
- A. Memory loss (Correct Answer)
- B. Neurofibrillary tangles
- C. Amyloid plaques
- D. Resting tremor
Dementia: Alzheimer's Type Explanation: ***Memory loss***
- **Memory loss**, particularly of recent events (anterograde amnesia), is the **earliest and most prominent clinical symptom** of Alzheimer's disease.
- This is a **clinical characteristic** - an observable symptom experienced by the patient and noted by clinicians during evaluation.
- The memory deficit progressively worsens, initially affecting **short-term recall** and learned information, eventually extending to long-term memory and significantly impacting daily functioning.
*Neurofibrillary tangles*
- **Neurofibrillary tangles**, composed of hyperphosphorylated tau protein, are a **pathological hallmark** found in the brains of Alzheimer's patients at autopsy or biopsy.
- These are **microscopic findings**, not a clinical characteristic - they cannot be observed directly by the patient or clinician during clinical evaluation.
- Essential for definitive neuropathological diagnosis but not a clinical symptom.
*Amyloid plaques*
- **Amyloid plaques** (senile plaques), formed by aggregation of beta-amyloid peptides, are another **pathological hallmark** of Alzheimer's disease.
- Like neurofibrillary tangles, these are **microscopic neuropathological findings**, not observable clinical symptoms.
- They represent the underlying disease pathology but not the clinical presentation.
*Resting tremor*
- A **resting tremor** is a cardinal motor symptom of **Parkinson's disease**, not Alzheimer's disease.
- While some patients with advanced Alzheimer's may develop motor symptoms, resting tremor is **not a characteristic or prominent feature** of Alzheimer's disease.
- This option tests knowledge of differential diagnosis between neurodegenerative disorders.
Dementia: Alzheimer's Type Indian Medical PG Question 2: Which of the following medications in the treatment of Parkinson's disease is an NMDA antagonist?
- A. Amantadine (Correct Answer)
- B. Selegiline
- C. Entacapone
- D. Ropinirole
Dementia: Alzheimer's Type Explanation: ***Amantadine***
- **Amantadine** is an **NMDA receptor antagonist**, which contributes to its antiparkinsonian effects by modulating glutamatergic neurotransmission.
- It works by reducing the **excitatory effects of glutamate**, potentially improving motor fluctuations and dyskinesia in Parkinson's disease.
*Selegiline*
- **Selegiline** is a **selective irreversible inhibitor of monoamine oxidase B (MAO-B)**, which prevents the breakdown of dopamine.
- It enhances the availability of dopamine in the brain but does not act as an NMDA antagonist.
*Entacapone*
- **Entacapone** is a **catechol-O-methyltransferase (COMT) inhibitor** that prevents the peripheral breakdown of levodopa.
- This action increases the bioavailability of levodopa to the brain, but it is not an NMDA antagonist.
*Ropinirole*
- **Ropinirole** is a **dopamine agonist** that directly stimulates dopamine receptors in the brain.
- It mimics the effects of dopamine but does not interact with NMDA receptors.
Dementia: Alzheimer's Type Indian Medical PG Question 3: Regarding Alzheimer's disease which is/are not true :
- A. Initial loss of long term memory
- B. Step ladder pattern
- C. Delayed loss of short term memory
- D. All of the options (Correct Answer)
Dementia: Alzheimer's Type Explanation: ***Correct Option: All of the options***
- All three statements provided are **incorrect descriptions** of Alzheimer's disease.
- In Alzheimer's disease, **short-term memory loss occurs early** (not delayed), **long-term memory is preserved initially** (not lost first), and progression is **gradual and continuous** (not step-ladder pattern).
- Since all the statements are "not true" about Alzheimer's, "All of the options" is the correct answer to this negatively worded question.
*Incorrect Statement: Initial loss of long term memory*
- This is **NOT TRUE** for Alzheimer's disease.
- Alzheimer's is characterized by **early impairment of short-term memory** (new memory formation).
- Patients struggle to recall recent events or learn new information, while **long-term memories from the past** are preserved until later stages.
- Remote memories (childhood, early adulthood) remain relatively intact in early-to-moderate disease.
*Incorrect Statement: Step ladder pattern*
- This is **NOT TRUE** for Alzheimer's disease.
- Alzheimer's progression is typically **gradual, insidious, and continuous** with steady cognitive decline.
- A **step-ladder (stepwise) pattern** with sudden declines followed by plateaus is characteristic of **vascular dementia**, resulting from multiple cerebrovascular events.
- The stepwise deterioration reflects discrete vascular insults, not the neurodegenerative process of Alzheimer's.
*Incorrect Statement: Delayed loss of short term memory*
- This is **NOT TRUE** for Alzheimer's disease.
- **Short-term memory loss** is one of the **earliest and most prominent symptoms** of Alzheimer's disease, not delayed.
- Classic early presentations include difficulty recalling recently learned information, forgetting appointments, repeating questions, and misplacing items.
- The hippocampus, critical for forming new memories, is affected early in the disease process.
Dementia: Alzheimer's Type Indian Medical PG Question 4: Alzheimer's disease is associated with:
- A. Delusion
- B. Parkinsonism
- C. Delirium
- D. Dementia (Correct Answer)
Dementia: Alzheimer's Type Explanation: ***Dementia***
- **Alzheimer's disease** is the most common cause of **dementia**, a chronic and progressive neurodegenerative disorder characterized by a decline in cognitive function.
- Key features include **memory loss**, particularly of recent events, along with impairments in language, problem-solving, and other cognitive abilities that interfere with daily life.
*Delusion*
- **Delusions** are fixed, false beliefs that are not amenable to change in light of conflicting evidence, more commonly associated with **psychotic disorders** like **schizophrenia**.
- While individuals with advanced Alzheimer's disease can experience neuropsychiatric symptoms, including delusions, they are not the primary or defining feature of the disease itself.
*Parkinsonism*
- **Parkinsonism** refers to a group of neurological disorders characterized by motor symptoms such as **tremor**, **bradykinesia**, **rigidity**, and **postural instability**.
- It is the hallmark of diseases like **Parkinson's disease** or **Lewy body dementia**, but not the primary feature of Alzheimer's disease, although some individuals with Alzheimer's may later develop parkinsonian features.
*Delirium*
- **Delirium** is an acute, fluctuating confusional state characterized by a disturbance in attention and awareness.
- It is typically caused by an underlying medical condition, medication, or substance withdrawal, and is often reversible, unlike the chronic and progressive nature of Alzheimer's dementia.
Dementia: Alzheimer's Type Indian Medical PG Question 5: Neurotransmitter playing major part in the pathogenesis of Alzheimer's disease -
- A. Norepinephrine
- B. Acetylcholine (Correct Answer)
- C. Dopamine
- D. Serotonin
Dementia: Alzheimer's Type Explanation: ***Acetylcholine***
- Cholinergic neurons, particularly those projecting from the **nucleus basalis of Meynert**, are severely damaged in **Alzheimer's disease (AD)**, leading to a significant reduction in **acetylcholine** levels [2].
- This **cholinergic deficit** is strongly correlated with the cognitive decline and memory impairment observed in AD patients, making it a major target for pharmacological interventions [1].
*Norepinephrine*
- While **norepinephrine** systems can be affected in later stages of Alzheimer's, the primary and most significant neurotransmitter deficit implicated in the early pathogenesis is not norepinephrine [2].
- Deficits in norepinephrine are more commonly linked to **mood disturbances** and **attention deficits**, rather than the core cognitive impairment of AD.
*Dopamine*
- **Dopamine** pathways are more prominently implicated in conditions like **Parkinson's disease**, where there is a loss of dopaminergic neurons in the substantia nigra.
- While some dopamine dysfunction can occur in AD, it is not considered the primary neurotransmitter involved in its pathogenesis or the initial cognitive decline.
*Serotonin*
- **Serotonin** imbalances are primarily associated with mood disorders such as **depression** and **anxiety** [1].
- Although serotonergic dysfunction can be present in AD, it is secondary to the profound loss of cholinergic neurons and does not play the major primary role in the disease's pathogenesis [2].
Dementia: Alzheimer's Type Indian Medical PG Question 6: Dementia of Alzheimer's type is not associated with one of the following
- A. Delusions
- B. Apraxia and aphasia
- C. Cerebral infarcts (Correct Answer)
- D. Depressive symptoms
Dementia: Alzheimer's Type Explanation: ***Cerebral infarcts***
- **Cerebral infarcts** are characteristic of **vascular dementia**, where brain damage is caused by reduced blood flow due to stroke or transient ischemic attacks.
- While an individual with Alzheimer's could coincidentally have a stroke, **cerebral infarcts** are not a primary neuropathological feature or an expected clinical association inherent to the progression of Alzheimer's disease itself.
*Delusions*
- **Delusions**, particularly paranoid delusions (e.g., believing caregivers are stealing from them), are relatively common **psychotic symptoms** that can occur in later stages of Alzheimer's disease.
- They are considered a behavioral and psychological symptom of dementia (BPSD) and can significantly impact the patient's and caregiver's quality of life.
*Apraxia and aphasia*
- **Apraxia** (difficulty with motor tasks despite intact motor function) and **aphasia** (language difficulties) are core **cognitive symptoms** that define Alzheimer's dementia.
- These are progressive deficits in executive function, language, and motor skills that lead to functional impairment.
*Depressive symptoms*
- **Depressive symptoms**, including apathy, anhedonia, and low mood, are highly prevalent in individuals with Alzheimer's disease, particularly in the earlier stages.
- They can be a reaction to the cognitive decline and loss of independence, or a direct result of the neurodegenerative process affecting mood-regulating brain regions.
Dementia: Alzheimer's Type Indian Medical PG Question 7: Reversible dementia is a feature of:
- A. Endocrine disorder (Correct Answer)
- B. Frontotemporal dementia
- C. Vascular dementia
- D. Neurodegenerative disorder
Dementia: Alzheimer's Type Explanation: ***Endocrine disorder***
- Certain **endocrine disorders**, such as **hypothyroidism** or **hyperparathyroidism**, can cause cognitive impairment that is reversible with appropriate treatment.
- Correction of the underlying hormonal imbalance often leads to significant improvement or full resolution of cognitive symptoms.
*Frontotemporal dementia*
- This is a **progressive neurodegenerative disorder** characterized by changes in personality, behavior, and language, which are generally irreversible [3].
- It involves the degeneration of the **frontal and temporal lobes** of the brain, leading to permanent cognitive decline.
*Vascular dementia*
- Caused by **reduced blood flow to the brain** due to strokes or other cerebrovascular events, leading to irreversible brain damage [1].
- While supportive care can manage symptoms, the underlying brain damage and cognitive deficits are generally **not reversible**.
*Neurodegenerative disorder*
- This is a broad category of conditions, including **Alzheimer's disease** and **Parkinson's disease**, that involve progressive loss of neurons and are characterized by irreversible cognitive decline [2], [4].
- The brain damage associated with these conditions is permanent and worsens over time.
Dementia: Alzheimer's Type Indian Medical PG Question 8: All are true about dementia except:
- A. Loss of long term memory
- B. Impaired learning
- C. Always reversible with medication (Correct Answer)
- D. Loss of short term memory
Dementia: Alzheimer's Type Explanation: ***Always reversible with medication***
- While some forms of cognitive impairment are reversible, **dementia** is broadly defined by a cognitive decline that is **progressive** and **irreversible** in most cases, such as in **Alzheimer's disease**.
- Medications generally aim to slow progression or manage symptoms, not fully reverse the underlying pathology of most dementias.
*Loss of long term memory*
- **Long-term memory loss** can occur in the later stages of many dementias, although it is often more prominent than short-term memory loss earlier in some types, like **vascular dementia**.
- The disease progression eventually impacts both recent and remote memories.
*Impaired learning*
- **Impaired learning** is a hallmark symptom of dementia, reflecting the difficulty in acquiring new information.
- This is closely linked to deficits in **attention** and **working memory**, crucial for encoding new memories.
*Loss of short term memory*
- **Short-term memory loss** (difficulty remembering recent events or new information) is often one of the **earliest and most prominent** symptoms of common dementias, particularly **Alzheimer's disease**.
- This symptom significantly impacts daily functioning and quality of life.
Dementia: Alzheimer's Type Indian Medical PG Question 9: Dementia is present in all except:
- A. Lewy body dementia
- B. Pick's disease
- C. Ganser syndrome (Correct Answer)
- D. Alzheimer's disease
Dementia: Alzheimer's Type Explanation: ***Ganser syndrome***
- Ganser syndrome is a **factitious disorder** characterized by approximate answers, not true dementia.
- Patients with Ganser syndrome often present with dramatic, but ultimately **nonsensical responses** to simple questions, without a clear underlying organic cause of cognitive decline.
*Lewy body*
- **Lewy body dementia** is characterized by fluctuating cognition, recurrent visual hallucinations, and spontaneous parkinsonism.
- It involves the presence of **Lewy bodies** in cortical and subcortical regions leading to progressive cognitive decline.
*Pick's disease*
- Pick's disease, a type of frontotemporal dementia, is characterized by language and **behavioral changes** due to neuronal loss.
- It results in progressive **atrophy of the frontal and temporal lobes**, leading to profound cognitive deficits over time.
*Alzheimer's disease*
- **Alzheimer's disease** is the most common cause of dementia, characterized by progressive memory loss and cognitive impairment.
- It is pathologically defined by the presence of **amyloid plaques** and **neurofibrillary tangles** in the brain.
Dementia: Alzheimer's Type Indian Medical PG Question 10: Reversible dementia is seen in all EXCEPT:
- A. Hypothyroidism
- B. Alzheimer's (Correct Answer)
- C. Wernicke's encephalopathy
- D. Head trauma
Dementia: Alzheimer's Type Explanation: ***Alzheimer's***
- Alzheimer's disease is a **progressive neurodegenerative disorder** characterized by the accumulation of **beta-amyloid plaques** and **neurofibrillary tangles**, leading to irreversible cognitive decline.
- While symptoms can be managed, the underlying pathology of Alzheimer's is **irreversible** and gets progressively worse.
*Hypothyroidism*
- **Severe or untreated hypothyroidism** can lead to cognitive impairment resembling dementia, often referred to as "myxedema madness."
- This cognitive dysfunction is typically **reversible** with appropriate **thyroid hormone replacement therapy**.
*Wernicke's encephalopathy*
- This condition is caused by a **thiamine (vitamin B1) deficiency**, commonly seen in chronic alcoholics.
- The cognitive deficits, including confusion and memory problems, are **reversible** if treated promptly with **thiamine supplementation**.
*Head trauma*
- **Acute cognitive deficits** following mild to moderate traumatic brain injury (TBI) can be **reversible** with rehabilitation and recovery time.
- However, it's important to note that **severe TBI** and **chronic traumatic encephalopathy (CTE)** typically cause **irreversible** dementia.
- In the context of this question, head trauma is generally classified under reversible causes when referring to **acute post-traumatic cognitive impairment** that can improve with treatment.
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