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ChapterAnatomy Cross-sectional anatomy

Anatomical planes and reference lines

Free notes, MCQs, tables & flowcharts for USMLE Step 1 Anatomy

10Questions
9Flashcards
1Tables & Flowcharts

Sample Questions

1

You are seeing a patient in clinic who presents with complaints of weakness. Her physical exam is notable for right sided hyperreflexia, as well as the reflex finding shown in the image below. Where is the most likely location of this patient's lesion?

APostcentral gyrus

BNeuromuscular junction

CLateral geniculate nucleus

DInternal capsule

ESubthalamic nucleus

2

A 40-year-old woman is brought to the emergency department by a paramedic team from the scene of a motor vehicle accident where she was the driver. The patient was restrained by a seat belt and was unconscious at the scene. On physical examination, the patient appears to have multiple injuries involving the trunk and extremities. There are no penetrating injuries to the chest. As part of her trauma workup, a CT scan of the chest is ordered. At what vertebral level of the thorax is this image from?

AT1

BT6

CT4

DT5

ET8

3

A 14-year-old boy is brought to the emergency department because of acute left-sided chest pain and dyspnea following a motor vehicle accident. His pulse is 122/min and blood pressure is 85/45 mm Hg. Physical examination shows distended neck veins and tracheal displacement to the right side. The left chest is hyperresonant to percussion and there are decreased breath sounds. This patient would most benefit from needle insertion at which of the following anatomical sites?

A5th left intercostal space along the midclavicular line

B8th left intercostal space along the posterior axillary line

C2nd left intercostal space along the midclavicular line

DSubxiphoid space in the left sternocostal margin

E5th left intercostal space along the midaxillary line

+ 7 more in the PDF

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