Seizure Disorders USMLE Step 1 Practice Question
A 33-year-old man presents with recurrent episodes of rhythmic jerking isolated to his left hand lasting 20-30 seconds while maintaining full consciousness and conversing normally. He denies postictal confusion. Vital signs: BP 128/82, HR 88, RR 16, Temp 37°C, SpO2 98%. Neurologic examination between episodes is normal. Interictal EEG shows no focal abnormalities. Brain MRI reveals no structural lesions. He takes no anticonvulsants. Which diagnosis best explains these findings?
Answer choices
- APsychogenic nonepileptic seizure
- BFocal aware motor seizureCorrect answer
- CGeneralized tonic clonic seizure
- DAbsence seizure
- EFocal impaired awareness seizure
- FEssential tremor with anxiety-induced exacerbation
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