Tags: Anatomical Structure.
The costal groove is a groove between the ridge of the internal surface of the rib and the inferior border. It contains the intercostal vessels and intercostal nerve the order of which (from superior to inferior) can be remembered with the mnemonic VAN which stands for Vein Artery Nerve. In herpetology costal grooves refer to lateral indents along the integument of salamanders. The grooves run between the axilla to groin.
