NBCE - General Anatomy What structure in the IVD is a remnant of the notochord? Correct Ans - Nucleus Pulposis T4 Dermatome is level with what? Correct Ans - nipple T10 dermatome is level with what? Correct Ans - umbilicus T1-T6 Dorsal Rami Correct Ans - medial branches = intrinsic back muscles, then cutaneous, lateral branches = purely motor (erectors) T7-T12 Dorsal Rami Correct Ans - medial branches = purely motor (erectors), lateral branches = intrinsic back muscles, then cutaneous What are the abdominal quadrants? Correct Ans - RUQ, RLQ, LUQ, LLQ What are the abdominal regions? Correct Ans - R/L hypochondriac, RL lumbar, RL iliac, epigastric, umbilical, hypogastric What are the layers of the skin? Correct Ans - Basale, spinosum, granulosum, lucidum, corneum (lucidum only found in thick skin) what nerve supplies the T12 dermatome? Correct Ans - subcostal n.what 2 nerves supply the L1 dermatome? Correct Ans - ilioinguinal, iliohypogastric Where do osteocytes live? Correct Ans - lacunae T/F. Haversian canals have a horizontal orientation. Correct Ans - false, vertical orientation Volkman's canals Correct Ans - perpendicular orientation, connect haversian canals 1 / 2
canaliculi Correct Ans - gap junctions in bone, provide means for osteocytes to communicate and exchange nutrients endochondral ossification Correct Ans - most common, preformed cartilage mold gets turned into bone, primary ossification centers in diaphysis, secondary ossification centers in epiphysis intramembranous ossification Correct Ans - starts with a layer of mesenchymal cells, skull, mandible, clavicles osteoprogenitor cells are precursors to what? Correct Ans - osteoblasts What are the muscles of the rotator cuff? Correct Ans - SITS (supraspinatus, infraspinatus, teres minor, subscapularis) Supraspinatus Correct Ans - O: supraspinous fossa I: greater tubercle N: suprascapular n. A: abduction Infraspinatus Correct Ans - O: infraspinous fossa I: greater tubercle N: suprascapular n. A: lateral rotation Teres Minor Correct Ans - O: upper lat. border scap I: greater tubercle N: axillary A: lateral rotation Subscapularis Correct Ans - O: subscapular fossa I: lesser tubercle N: subscapular ns. A: medial rotation What are the boundaries of the axilla? Correct Ans - pecs, teres minor, lats, subscapularis, ribs, humerus What are the roots of the brachial plexus? Correct Ans - C5-T1 What are the trunks of the brachial plexus? Correct Ans - superior (C5/C6), middle (C7), inferior (C8/T1) What are the divisions of the brachial plexus? Correct Ans - anterior (upper/middle trunk) and posterior (lower trunk)
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