Seizure Disorders and Epilepsy — MCQs
Which of the following is LEAST preferred as first-line treatment for pediatric status epilepticus?
What is correct about febrile seizures
All the following are indications for brain imaging in epilepsy, except:
Which of the following seizures has a clinical presentation of impaired consciousness with motor, sensory, or autonomic symptoms which are focal?
Absence seizures are characterized on EEG by:
Which of the following electrolyte abnormalities is a cause of status epilepticus in a child?
72-year-old gentleman with normal renal functions presents with new onset focal seizures. Which of the following is the best drug to manage the patient?
Caution is taken while doing Inter-maxillary Fixation (IMF) for which of these types of patients?
The percentage of children with simple febrile seizures who develop epilepsy is:
Subacute Sclerosing Panencephalitis is a rare and dangerous complication of;
Seizure Disorders and Epilepsy Indian Medical PG Practice Questions and MCQs
Question 1: Which of the following is LEAST preferred as first-line treatment for pediatric status epilepticus?
- A. Clonazepam (Correct Answer)
- B. Fosphenytoin
- C. Diazepam
- D. Phenobarbital
Explanation: ***Clonazepam*** - While a benzodiazepine, **clonazepam** is generally not considered a first-line agent for acute status epilepticus due to its **slower onset of action** compared to other benzodiazepines like midazolam or diazepam. - Its longer half-life also makes it less ideal for rapid termination of seizures when immediate action is needed to prevent neuronal injury. *Fosphenytoin* - **Fosphenytoin** is a **prodrug of phenytoin** that is often used as a second-line agent for status epilepticus after benzodiazepines have failed. - It can be administered more rapidly and has a lower risk of local injection site reactions compared to phenytoin, making it a viable option when first-line agents are insufficient. *Diazepam* - **Diazepam** is a **short-acting benzodiazepine** that is a preferred first-line treatment for status epilepticus, especially in the pre-hospital setting or as an initial hospital intervention. - It has a **rapid onset of action** when administered intravenously or rectally, effectively terminating seizures quickly. *Phenobarbital* - **Phenobarbital** is a **barbiturate** that acts as a potent anticonvulsant and is considered a second-line or third-line treatment option for status epilepticus, particularly in pediatric patients. - While effective, its use is often reserved for cases unresponsive to benzodiazepines due to its potential for **respiratory depression** and sedative effects.
Question 2: What is correct about febrile seizures
- A. Focal deficits
- B. Repeated seizure
- C. Abnormal EEG
- D. Normal EEG (Correct Answer)
Explanation: ***Normal EEG*** - An **electroencephalogram (EEG)** is generally **not recommended** after a simple febrile seizure because these seizures are due to the brain's response to fever, not an underlying epileptic disorder. - The **EEG typically appears normal** following a simple febrile seizure, as there is no intrinsic cerebral pathology to detect. - Simple febrile seizures are benign events that do not require routine EEG investigation. *Focal deficits* - **Focal neurological deficits** (e.g., weakness on one side of the body) are **not characteristic** of **simple febrile seizures** and would suggest a more complex neurological issue or an underlying etiology. - The presence of focal deficits would prompt further investigation for complex febrile seizures or other neurological conditions. *Repeated seizure* - While **recurrence of febrile seizures** is common (about 30-35% of children experience a second seizure), this refers to a **risk factor** for recurrence rather than a defining characteristic of febrile seizures. - Risk factors for recurrence include young age at first seizure, family history of febrile seizures, low fever at onset, and brief duration between fever onset and seizure. *Abnormal EEG* - An **abnormal EEG** in the context of a febrile seizure would raise concerns for an **underlying epileptic syndrome** or other neurological pathology, which is not typical for **simple febrile seizures**. - Routine EEG is not indicated for simple febrile seizures as it is unlikely to show abnormalities and is not predictive of future epilepsy.
Question 3: All the following are indications for brain imaging in epilepsy, except:
- A. EEG shows a focal seizure source
- B. Control of seizures is difficult
- C. Seizures have focal features clinically
- D. Epilepsy starts after the age of 5 years (Correct Answer)
Explanation: Address the indications for brain imaging in epilepsy based on clinical guidelines. ***Epilepsy starts after the age of 5 years*** - The recommendation for **brain imaging** is typically suggested for epilepsy onset after the age of **16 years** to rule out structural causes, rather than age 5 [2]. An onset at age 5 does not exclude the possibility of idiopathic epilepsy, which often does not require imaging [1]. - While it's a good practice to image any new onset epilepsy, age 5 by itself is not a specific indication that *demands* imaging beyond standard workup if no other red flags are present. *EEG shows a focal seizure source* - A **focal seizure source identified on EEG** strongly indicates a structural lesion in the brain that could be responsible for the seizures [2]. - **Brain imaging** (e.g., MRI) is essential to identify the underlying **structural abnormality**, such as a tumor, malformation, or scar tissue [2]. *Control of seizures is difficult* - Poorly controlled or **refractory seizures** warrant further investigation with brain imaging to look for an **underlying structural cause** that might be amenable to surgical intervention or require alternative therapies [2]. - This suggests the possibility of a lesion that is not responding to standard anti-epileptic drugs, necessitating a search for the **etiology of intractability** [3]. *Seizures have focal features clinically* - **Focal clinical features** (e.g., twitching of one limb, sensory disturbances on one side) strongly point to a specific area of the brain where the seizures originate [4]. - **Brain imaging** is crucial to identify any **structural lesion** (e.g., tumor, malformation, stroke) corresponding to the clinically localized area of seizure onset [2].
Question 4: Which of the following seizures has a clinical presentation of impaired consciousness with motor, sensory, or autonomic symptoms which are focal?
- A. Simple partial
- B. Generalized tonic clonic
- C. Complex partial (Correct Answer)
- D. Status epilepticus
Explanation: ***Complex partial*** - This type of seizure involves **impaired consciousness** (though not complete loss) and usually originates in a specific, **focal area** of the brain [1]. - It presents with various **motor, sensory, or autonomic symptoms** depending on the affected brain region, such as lip smacking, automatisms, or odd sensations [1]. *Simple partial* - While also focal, **consciousness remains intact** during a simple partial seizure, distinguishing it from the described scenario [1]. - Symptoms are often localized and can include motor jerking, sensory changes, or autonomic phenomena, but **without altered awareness** [1]. *Generalized tonic clonic* - This seizure type involves **loss of consciousness** from the onset and affects both sides of the brain, leading to characteristic tonic (stiffening) and clonic (jerking) phases [2]. - It does not present with **focal motor, sensory, or autonomic symptoms** in the way a complex partial seizure does, and consciousness is completely lost [2]. *Status epilepticus* - This is a medical emergency defined as a **prolonged seizure** (typically lasting more than 5 minutes) or **repeated seizures** without full recovery of consciousness between them. - It refers to the duration or pattern of seizures, not a specific seizure type with focal symptoms and impaired consciousness as described.
Question 5: Absence seizures are characterized on EEG by:
- A. Generalized polyspikes
- B. Hypsarrhythmia
- C. 1-2 Hz spike & wave
- D. 3 Hz spike and wave (Correct Answer)
Explanation: ***3 Hz spike and wave*** - **Absence seizures** are classically characterized by a **generalized, synchronous 3 Hz spike-and-wave discharge** pattern on EEG. - This pattern is seen bilaterally and symmetrically, reflecting the generalized nature of the seizure. *Generalized polyspikes* - **Generalized polyspikes** (multiple spikes) are often associated with other types of generalized seizures, such as **myoclonic seizures**, rather than typical absence seizures. - While reflecting generalized activity, the specific **3 Hz spike-and-wave** is the hallmark of absence seizures. *Hypsarrhythmia* - **Hypsarrhythmia** is a chaotic, high-amplitude, irregular pattern seen in **infantile spasms** (West syndrome), not absence seizures. - It is characterized by random high-voltage slow waves and spikes in all derivations. *1-2 Hz spike & wave* - A **slow spike-and-wave pattern (1-2.5 Hz)** is typically associated with **Lennox-Gastaut syndrome**, a severe epileptic encephalopathy. - This differs significantly from the faster **3 Hz spike-and-wave** characteristic of typical absence seizures.
Question 6: Which of the following electrolyte abnormalities is a cause of status epilepticus in a child?
- A. Hypokalemia
- B. Hyperkalemia
- C. Hypernatremia
- D. Hyponatremia (Correct Answer)
Explanation: ***Hyponatremia*** - **Hyponatremia** (low sodium levels) can lead to **cerebral edema**, increasing intracranial pressure and predisposing to seizures, including status epilepticus, especially in children. - Rapid shifts in fluid balance and electrolyte disturbances, such as those seen with severe hyponatremia, can destabilize neuronal membranes and trigger **sustained seizure activity**. *Hypokalemia* - While significant **hypokalemia** (low potassium) affects cardiac and muscular function, it is **less commonly a direct cause of seizures** or status epilepticus compared to sodium imbalances. - Severe hypokalemia can impact neuronal excitability but primarily causes **muscle weakness** and **cardiac arrhythmias**. *Hyperkalemia* - **Hyperkalemia** (high potassium) primarily affects **cardiac conduction** and neuromuscular function, leading to **bradycardia** or **cardiac arrest**. - It is **not typically associated with seizures** or status epilepticus in children. *Hypernatremia* - **Hypernatremia** (high sodium) indicates a relative water deficit, leading to cell shrinkage and potentially **intracranial hemorrhage** or **thrombosis**. - While severe hypernatremia can cause neurological symptoms like **lethargy** or **coma**, it is **less commonly a direct cause of status epilepticus** compared to hyponatremia.
Question 7: 72-year-old gentleman with normal renal functions presents with new onset focal seizures. Which of the following is the best drug to manage the patient?
- A. Oxcarbazepine
- B. Sodium valproate
- C. Pregabalin
- D. Levetiracetam (Correct Answer)
Explanation: ***Levetiracetam*** - **Levetiracetam** is an excellent choice for elderly patients with new-onset focal seizures due to its favorable side effect profile, **minimal drug interactions**, and lack of significant hepatic or renal metabolism, making it suitable for those with normal renal function. - It has a generally **good tolerability**, especially important in the elderly who may be on multiple medications and more sensitive to side effects. *Oxcarbazepine* - **Oxcarbazepine** can cause significant **hyponatremia**, which is a concern in elderly patients who may already be at risk due to other medications or conditions. - While effective for focal seizures, its potential for electrolyte disturbances makes it less ideal than levetiracetam in this demographic. *Sodium valproate* - **Sodium valproate** is associated with a higher risk of **cognitive side effects**, sedation, and **tremor**, which can significantly impact the quality of life in elderly patients. - It also has a potential for **hepatotoxicity** and numerous drug interactions, making it a less preferred option. *Pregabalin* - **Pregabalin** is primarily indicated for partial seizures and **neuropathic pain**, and while it can be used as an add-on therapy, it is not typically a first-line monotherapy for new-onset focal seizures. - It often causes **dizziness and somnolence**, which can increase the risk of falls in the elderly, a major concern in this age group.
Question 8: Caution is taken while doing Inter-maxillary Fixation (IMF) for which of these types of patients?
- A. Psychiatric disorders
- B. All of the options (Correct Answer)
- C. Substance abusers
- D. Epileptics
Explanation: ***All of the options*** - All of these patient groups require extra caution during IMF due to potential complications during the period of jaw immobilization. - For patients with **psychiatric disorders**, **substance abuse**, or **epilepsy**, the risks associated with IMF often outweigh the benefits, necessitating careful assessment and alternative treatment strategies. *Psychiatric disorders* - Patients with psychiatric disorders may have difficulty tolerating the **entrapment** feeling of IMF. - They also have a higher risk of **non-compliance** and may attempt to remove the fixation. *Substance abusers* - **Vomiting** is common in substance abusers, which can lead to **aspiration** if the jaw is wired shut. - These patients may also be **non-compliant** with post-operative care instructions, jeopardizing treatment outcomes. *Epileptics* - **Seizures** during IMF can lead to serious complications, including **aspiration** if vomiting occurs. - The forceful jaw movements during a seizure can also cause **fracture of the teeth** or damage to already **repaired jaw bones**.
Question 9: The percentage of children with simple febrile seizures who develop epilepsy is:
- A. 1-2% (Correct Answer)
- B. 5-10%
- C. 2-5%
- D. 10-20%
Explanation: ***1-2%*** - The risk of developing **epilepsy** after a simple febrile seizure is generally low, estimated to be around **1-2%**. - This low percentage highlights that simple febrile seizures are typically benign and do not commonly lead to chronic seizure disorders. *5-10%* - This percentage is too high for the risk of epilepsy after a **simple febrile seizure**. - A higher risk might be associated with complex febrile seizures or other neurological predisposition. *2-5%* - While closer, this range is still slightly higher than the generally accepted risk for uncomplicated **simple febrile seizures** leading to epilepsy. - This range might be considered for cases with some atypical features, but not for typical simple febrile seizures. *10-20%* - This percentage represents a significantly **elevated risk** that is far beyond what is observed for typical simple febrile seizures. - Such a high risk would indicate a much more serious underlying neurological disorder or complex seizure presentation.
Question 10: Subacute Sclerosing Panencephalitis is a rare and dangerous complication of;
- A. Rubella
- B. Varicella
- C. Mumps
- D. Measles (Correct Answer)
Explanation: ***Measles*** - **Subacute sclerosing panencephalitis (SSPE)** is a rare, fatal degenerative disease of the central nervous system caused by persistent infection with a defective **measles virus**. [1] - It typically develops **years after the initial measles infection**, affecting children and young adults, leading to cognitive decline, seizures, and motor dysfunction. [1], [2] *Rubella* - While rubella can cause congenital rubella syndrome, it is **not associated with SSPE**. - Complications of rubella usually involve birth defects, such as **cardiac malformations**, **deafness**, and **cataracts**, when acquired during pregnancy. *Varicella* - **Varicella-zoster virus (VZV)** causes chickenpox and shingles, but it is **not a known cause of SSPE**. - Neurological complications of VZV can include **cerebellar ataxia** or **encephalitis** acutely, or **postherpetic neuralgia** in later life. *Mumps* - Mumps virus can cause **parotitis**, **orchitis**, and **meningitis/encephalitis**, but it is **not implicated in the development of SSPE**. - The encephalitis associated with mumps typically occurs during the acute infection and generally has a good prognosis.
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