"the larger (main) branch courses laterally in the upper aspect of their respective intercostal space, below the intercostal vein and above the intercostal nerve (mnemonic "VAN"), protected by the costal groove of the rib above."
"the smaller (collateral) branch descends into the lower aspect of their respective intercostal space and courses laterally. Here they are not offered protection by the rib above."
"Gross Anatomy"
Expected headings
"Gross Anatomy"
"Branches"
"Supply"