Key factoids from Michigan questions Flashcards
What’s between T12 and L2?
conus medullaris
denticulate ligament is made of
pia mater
Iliac crests - which lumbar vertebrae?
L4 (spinal tap here, since below L2)
name 3 ligaments pierced in a spinal tap
supraspinous ligament, interspinous ligament, and ligamenta flava
How many spinal nerve segments are there?
31
The C5 and C6 dermatomes cover the top of the shoulder and lateral side of the arm. The T1 and C8 dermatomes cover the medial side of the arm, with C8 extending to the tip of the little finger. The back of the shoulder is covered by numerous dermatomes, including C6, C7, C8, and T1. Finally, the pectoral region is covered by T1, T2, and T3 dermatomes. To visualize this, see Netter Plate 465.
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If all the lymph nodes lateral to the medial edge of pectoralis minor are removed, the central, lateral, pectoral and subscapular nodes will be removed. The central nodes are found directly under pectoralis minor, while the other three groups of nodes are lateral to the entire muscle. The apical nodes, which are medial to the medial edge of pectoralis minor, will not be removed.
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The central lymph nodes are defined as the group of lymph nodes situated deep to the pectoralis minor at the base of the axilla. The central nodes receive lymph from the lateral, subscapular and pectoral lymph nodes. The lateral nodes are found on the lateral wall of the axilla; the subscapular nodes are found on the posterior wall of the axilla; the pectoral nodes are found on the anterior wall of the axilla. These groups of lymph nodes are lateral to pectoralis minor. The apical lymph nodes are medial to the medial border of the pectoralis minor, so they would not be found under pectoralis minor.
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Which muscle is the strongest medial rotator of the arm?
Subscapularis m.
3 tongue muscles done by XII
Genioglossus
Hyloglossus
Styloglossus
(Genie’s hate style)
