Usmle step 1 Anatomy notes and high yield notes

Feb 3rd, 2012
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Use these notes for the Usmle Step 1. It includes anatomy and some very important high yield information that is most likely to be on the Usmle step 1 exam.

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ANATOMY Drainage pattern to the superficial and deep inguinal lymph nodes. - Anything from the internal genitalia (testicles, ovaries, uterus) drains to the para-aortic lymph nodes- But what drains into the superficial and deep inguinal lymph nodes?- Deep inguinal lymph nodes drain the lower limb, while superficial nodes drain the external genitalia and superficial tissues. This is why we never resect or even biopsy via a transcrotal approach despite the fact that the testicles drain into the para-aortics. HY TIPS for USMLE- 1. Direct hernia: leaves abdominal cavity medial to inferior epigastric vesselsIndirect hernia: leaves abdominal cavity lateral to inferior epigastric vesselsFemoral hernia: protrusion of abdominal viscera through femoral ring into femoral canalLumbar puncture: needle into lumbar cistern between spinous processes L3/L4 or L4/L5 Pericardiocentesis: wide bore needle inserted through 5th or 6th intercostal space near sternum. Careful not to puncture internal thoracic artery - 2. Thyroid C5 Duodenum T12-L1Sternal notch T2 Kidneys T12-L3Bifurcation of trachea T4-T5 Conus medularis L1-L2 adult, L3 newbornHeart: Base T6-T9 Umbilicus L4Apex 5th left intercostal space - 3. Knee: 1. Patellar ligament- damage to femoral nerve or spinal cord L2-L4. Loss of patellar reflex 2. MCL- tear also tears medial meniscus. Passive abduction of extended leg at knee joint. 3. LCL- passive adduction of extended leg at knee joint. 4. ACL- anterior drawer sign. 5

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