WBR0577
| Author | [[PageAuthor::Rim Halaby, M.D. [1]]] |
|---|---|
| Exam Type | ExamType::USMLE Step 1 |
| Main Category | MainCategory::Anatomy, MainCategory::Pathophysiology |
| Sub Category | SubCategory::Neurology |
| Prompt | [[Prompt::A 72 year old male patient with history of atrial fibrillation on warfarin was admitted to the hospital for progressively increasing headache since 10 days and recent weird speech. The patient's wife informs the physician that the patient complained about a headache has started insidiously almost 10 days ago and was progressively getting worse. The wife reports a history of mild trauma three weeks ago, during which the patient tripped and fell on his head. Upon questioning the patient about how he is feeling, he answers back fluently and says: "A plane drink and I can not shower for coffee feet the trash". CT scan reveals subdural hematoma. Which of the following is the most likely area of the brain responsible for the patient's speech dysfunction?]] |
| Answer A | AnswerA::Superior temporal gyrus |
| Answer A Explanation | [[AnswerAExp::Wernicke's aphasia is a speech dysfunction characterized by impaired comprehension, intact speech fluency and impaired repetition. It results from damage to the superior temporal gyrus. Wernicke's aphasia is also known as sensory or receptive aphasia.]] |
| Answer B | AnswerB::Inferior frontal gyrus |
| Answer B Explanation | AnswerBExp::Broca's aphasia is a speech dysfunction characterized by intact comprehension, impaired speech fluency and impaired repetition. It results from damage to the inferior frontal gyrus. Broca's aphasia is also known as motor or expressive aphasia. |
| Answer C | AnswerC::Superior temporal and frontal gyri |
| Answer C Explanation | AnswerCExp::Global aphasia is a speech dysfunction characterized by impaired comprehension, impaired speech fluency and impaired repetition. It results from damage to a larger area of the brain involving the superior temporal and inferior frontal gyri. |
| Answer D | AnswerD::Arcuate fasiculus |
| Answer D Explanation | AnswerDExp::Conduction aphasia is a speech dysfunction characterized by intact comprehension, intact speech fluency and impaired repetition. It results from damage to the arcuate fasciculus. |
| Answer E | AnswerE::Thalamus |
| Answer E Explanation | AnswerEExp::Damage to the thalamus does not cause aphasia. |
| Right Answer | RightAnswer::A |
| Explanation | [[Explanation::The patient's presentation of progressively worsening headache and sensory aphasia following a history of trauma three weeks ago is suggestive of chronic subdural hemorrhage. The patient's age, use of anticoagulants and history of mild trauma support the diagnosis. The diagnosis is confirmed by the findings on CT scan. The patient's speech dysfunction is manifested by intact fluency and impaired comprehension which is characteristic of Wernicke's aphasia. Wernicke's aphasia is also known as sensory or receptive aphasia.
Educational objective: |
| Approved | Approved::No |
| Keyword | WBRKeyword::Aphasia, WBRKeyword::Wernicke aphasia, WBRKeyword::frontal lobe, WBRKeyword::subdural hematoma |
| Linked Question | Linked:: |
| Order in Linked Questions | LinkedOrder:: |