 Here's how to remember all of your deep tenor reflexes, also known as DTRs. First we have S1 and S2, buckle my shoe for Philly's reflex. Then we have L3L4, kick the door for Patellar Reflex. For C5 and C6, we have pick up sticks for 5 sets, and break your radialis reflex. C7C8, leave them straight for tricep reflex.