Neurology

Neurology UK Medical PG Question 1: A 42-year-old woman presents with fatigue, muscle aches, and widespread pain. She has multiple tender points but normal inflammatory markers. Sleep is poor. What is the most appropriate initial treatment?

• A. NSAIDs
• B. Prednisolone
• C. Pregabalin (Correct Answer)
• D. Methotrexate
• E. Physiotherapy alone

Neurology Explanation: ***Pregabalin*** - **Pregabalin** is a **gabapentinoid** drug that modulates voltage-gated calcium channels, decreasing the release of excitatory neurotransmitters involved in central pain sensitization characteristic of **fibromyalgia**. - It is one of the FDA-approved medications (along with duloxetine and milnacipran) specifically recommended for managing the **widespread pain** and associated symptoms like **poor sleep** in fibromyalgia. *NSAIDs* - Non-steroidal anti-inflammatory drugs (NSAIDs) target inflammatory pain, which is generally absent in **fibromyalgia** as evidenced by **normal inflammatory markers**. - NSAIDs are usually **ineffective** in treating the centralized pain and hyperalgesia seen in this condition, making them a poor choice for monotherapy. *Prednisolone* - **Prednisolone** is a powerful corticosteroid used for conditions driven by **inflammation** (e.g., active arthritis or vasculitis). - The patient has normal inflammatory markers and a clinical presentation consistent with a non-inflammatory central pain syndrome, making steroids **inappropriate** and potentially harmful. *Methotrexate* - **Methotrexate** is a **Disease-Modifying Anti-Rheumatic Drug (DMARD)** indicated for managing autoimmune inflammatory diseases like **Rheumatoid Arthritis** or **Psoriatic Arthritis**. - Since the patient does not show evidence of an inflammatory or autoimmune joint disease, this immunosuppressant drug treatment is **not warranted**. *Physiotherapy alone* - While non-pharmacological therapies like **aerobic exercise** and **Cognitive Behavioral Therapy (CBT)** are essential long-term components, they are often insufficient alone to manage severe initial symptoms, particularly **poor sleep** and disabling pain. - Initial treatment typically requires a combination of pharmacological agents (like **Pregabalin**) combined with supportive non-pharmacological management for optimal symptom control.

Neurology UK Medical PG Question 2: A 49-year-old man presents with progressive weakness in his arms and legs over 24 months. He has bulbar symptoms including dysphagia and dysarthria. EMG shows widespread denervation. What is the most important prognostic factor?

• A. Age at onset
• B. Rate of progression
• C. Bulbar involvement (Correct Answer)
• D. Site of onset
• E. Family history

Neurology Explanation: ***Bulbar involvement*** - The presence of **bulbar symptoms** (dysphagia and dysarthria) at presentation or early in the disease course is the single most important predictor of shorter survival in **Amyotrophic Lateral Sclerosis (ALS)**. - This is primarily because bulbar dysfunction leads quickly to difficulty swallowing, increasing the risk of **aspiration pneumonia** and malnutrition, and often precedes necessary respiratory intervention. *Age at onset* - While a factor, **older age (>65 years)** at onset is associated with a worse prognosis but is generally considered less influential than the pattern of motor neuron involvement. - Patients with **younger onset** (e.g., in their 40s) tend to have a slightly better prognosis than those with onset in their 70s. *Rate of progression* - The **rate of progression** directly determines the prognosis (survival time) itself, reflecting the speed of motor neuron loss. - However, **bulbar involvement** is often the underlying *predictor* or characteristic that drives a rapid rate of progression, making the bulbar site the more fundamental prognostic factor. *Site of onset* - The specific **site of onset** is critical, distinguishing between **limb-onset** and **bulbar-onset** ALS. - Because bulbar onset conveys the worst prognosis, selecting the specific involvement (**bulbar**) is more precise than selecting the general concept of

Neurology UK Medical PG Question 3: A 38-year-old woman presents with recurrent episodes of severe abdominal pain and psychiatric symptoms. Her urine turns dark during attacks. Family history reveals similar episodes. What is the inheritance pattern?

• A. Autosomal recessive
• B. Autosomal dominant (Correct Answer)
• C. X-linked recessive
• D. X-linked dominant
• E. Mitochondrial

Neurology Explanation: ***Autosomal dominant*** - The clinical picture of recurrent severe abdominal pain, psychiatric symptoms, and dark urine during attacks is highly suggestive of **Acute Intermittent Porphyria (AIP)**. - AIP is caused by a deficiency in **hydroxymethylbilane synthase (PBG deaminase)** and is inherited in an **autosomal dominant** fashion, which explains the positive family history. *Autosomal recessive* - **Autosomal recessive** disorders typically manifest if two copies of the defective gene are inherited, often presenting in siblings but not consistently across multiple generations (vertical transmission) as implied by the family history. - Conditions like **Congenital erythropoietic porphyria** are autosomal recessive but primarily cause photosensitivity and hemolytic anemia, not neurovisceral crises. *X-linked recessive* - **X-linked recessive** disorders predominantly affect males and are transmitted from carrier mothers to sons, a pattern inconsistent with a female patient with similar episodes in the family. - Common examples like **Hemophilia** or **Duchenne Muscular Dystrophy** have sex-linked inheritance patterns that do not match the presented symptoms or inheritance. *X-linked dominant* - **X-linked dominant** inheritance would show affected fathers passing the trait to all daughters but none of their sons, and affected mothers passing it to half of their children, which is not the typical pattern for AIP. - **X-linked protoporphyria**, a rare porphyria, follows this pattern but presents primarily with severe photosensitivity and hepatobiliary complications, not the neurovisceral attacks seen here. *Mitochondrial* - **Mitochondrial inheritance** is characterized by exclusive **maternal transmission**, meaning all children of an affected mother are affected, but no children of an affected father. This pattern differs from the general family history for AIP. - Mitochondrial disorders primarily affect high-energy-demand organs, and while they can have neurological components, most porphyrias are nuclear-encoded genetic disorders, making mitochondrial inheritance highly unlikely.

Neurology UK Medical PG Question 4: A 55-year-old woman presents with progressive dyspnea and fatigue. Echocardiogram shows severe aortic regurgitation with LV end-systolic dimension 58mm and EF 48%. She is asymptomatic at rest. What is the most appropriate management?

• A. Medical management
• B. Aortic valve replacement (Correct Answer)
• C. ACE inhibitors and monitoring
• D. Exercise stress testing
• E. Cardiac catheterization

Neurology Explanation: ***Aortic valve replacement*** - The patient presents with **severe aortic regurgitation** and objective evidence of **left ventricular (LV) dysfunction** (EF 48% < 50%) and **LV dilatation** (end-systolic dimension 58mm > 50-55mm). These findings are Class I indications for **aortic valve replacement**, even in an asymptomatic patient. - Surgical intervention is crucial to prevent irreversible myocardial damage and improve long-term outcomes in chronic **severe aortic regurgitation** once these thresholds for LV impairment are met. *Medical management* - Medical management is typically reserved for patients with **mild to moderate aortic regurgitation** or those with severe AR but **preserved LV function** and no significant LV dilatation who are asymptomatic. - It does not address the underlying mechanical defect of the **aortic valve** and will not reverse the progressive LV remodeling and dysfunction. *ACE inhibitors and monitoring* - While ACE inhibitors can be considered for management of hypertension or symptomatic heart failure in some AR patients, they are not the definitive treatment for **severe aortic regurgitation** with established LV dysfunction. - **Monitoring alone** is inappropriate given the significant LV remodeling and dysfunction, which necessitate surgical intervention to prevent further irreversible damage. *Exercise stress testing* - Exercise stress testing is primarily used to unmask symptoms in **asymptomatic patients** with severe valve disease (e.g., aortic stenosis or regurgitation) and **preserved LV function** to assess their functional capacity and guide surgical timing. - In this case, the patient already has clear echocardiographic evidence of **LV dysfunction** (EF 48%) and significant **LV dilatation** (ESD 58mm), which are direct indications for surgery, rendering stress testing unnecessary for decision-making. *Cardiac catheterization* - **Cardiac catheterization** is primarily a diagnostic procedure performed to assess for **coronary artery disease** (CAD) in patients undergoing cardiac surgery, especially in older individuals or those with CAD risk factors. - It is not the definitive management for **aortic regurgitation** itself but may be a pre-operative step. The primary treatment remains valve replacement.

Neurology UK Medical PG Question 5: A 28-year-old woman presents with sudden onset severe headache during exercise. She vomits and has neck stiffness. CT head shows subarachnoid hemorrhage. What is the most likely cause?

• A. Arteriovenous malformation
• B. Berry aneurysm (Correct Answer)
• C. Carotid dissection
• D. Hypertensive hemorrhage
• E. Trauma

Neurology Explanation: ***Berry aneurysm*** - The sudden onset of a severe, explosive **thunderclap headache** coupled with signs of meningeal irritation (vomiting, neck stiffness) and the finding of **subarachnoid hemorrhage (SAH)** on CT head is the classic presentation of a ruptured saccular (**berry**) aneurysm. - Exertion (exercise) acts as a common trigger for aneurysm rupture due to the sudden increase in **intracranial pressure** and transmural wall stress. *Arteriovenous malformation* - AVMs more commonly present with **intraparenchymal hemorrhage** (ICH) or seizures, rather than isolated SAH, especially when triggered by exertion. - While AVMs can cause SAH, they are a less frequent cause of widespread spontaneous SAH compared to ruptured **berry aneurysms**. *Carotid dissection* - Carotid artery dissection typically manifests as severe neck/facial pain, headache, and signs of **cerebral ischemia** (stroke symptoms) due to vessel stenosis or occlusion. - Dissections rarely cause primary, widespread SAH; they are more often associated with **subintimal hemorrhage** leading to stroke or pseudoaneurysm formation. *Hypertensive hemorrhage* - Hemorrhage due to chronic or severe hypertension (hypertensive hemorrhage) almost exclusively causes deep **intraparenchymal hemorrhage** (ICH), usually in the basal ganglia, thalamus, or brainstem. - The primary finding of SAH, rather than ICH and the patient's young age, makes uncontrolled hypertension highly unlikely as the underlying cause. *Trauma* - Although trauma is the single most frequent overall cause of SAH, the clinical history describes a **spontaneous event** triggered by exertion (exercise) without any external injury. - Traumatic SAH is clinically differentiated by the history of a specific injury and usually involves bleeding adjacent to the site of impact.

Neurology Flashcard 1 of 5

Question: A _____ classically presents with a sudden-onset "thunderclap headache"

Answer: subarachnoid haemorrhage

Neurology Flashcard 2 of 5

Question: Strokes can be broadly catagorised into two groups based on their mechanism: _____ & ischaemic

Answer: haemorrhagic

Neurology Flashcard 3 of 5

Question: What is the most appropriate step in the management of an active seizure in a patient with epilepsy? _____

Answer: Manage ABCs THEN abort the seizure if > 5 minutes THEN assess therapeutic drug levels THEN assess VITAMINS and get EEG

Neurology Flashcard 4 of 5

Question: What condition would anticholinergic medication be contraindicated for urgency incontinence _____

Answer: Myasthenia Gravis

Neurology Flashcard 5 of 5

Question: Bromocriptine, Ropinirole, Cabergoline and Apomorphine are examples of _____

Answer: dopamine agonist