- 500 High-Yield Facts you need to before you go to USMLE step 1 exam
500 High-Yield Facts You Need To Know For USMLE STEP 1
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The MCC of aortic rupture is a motor vehicle accident, will show an enlarged
mediastinum on x-ray.
Winged scapula is caused by injury to the long thoracic nerve.
The coracobrachialis is innervated by the musculocutaneous nerve.
Radial head subluxation (Nursemaid’s elbow) results from pulling a child’s arm
while extended and pronated. Most worrisome damage is to the deep branch of the
Wrist drop occurs as a result of damage to the radial nerve.
Loss of sensation to the lateral aspect of the upper arm is caused by axillary nerve
injury, a common injury seen with fracture to the surgical neck of the humerus.
Taste to the anterior 2/3 of the tongue is from CN 7 (Facial n.)
Taste to the posterior 1/3 of the tongue is from CN 9 (Glossopharyngeal n.)
CN 3 & 4 are from the midbrain, CN 5, 6, 7, 8 are from the Pons, CN 9, 10, 11, 12 are
from the Medulla.
Injury to the fibular neck is a common cause of peroneal n. injury.