If you're having trouble establishing a mind-muscle connection with your triceps then begin the workout with something that puts the muscle into a shortened position, and work isometrics (holding the contraction) to help with that. Try a pushdown variation. My favorite for this is the reverse-grip pushdown.
Make a concerted effort to roll your knuckles back towards your body and hold that for a 2-3 count for 3-4 sets.
related posts
Tip: Standing Rotational Rope Row, Unilateral
Pittsburg Pirates outfielder, Austin Meadows, demonstrates this variation of the rope row. Note the hand rotation for more activation of the lats and upper back.
Training Speed to Get Strong
Learn to apply force quickly and it'll make you stronger. That's what speed training is all about: power, explosiveness, and strength. Try this before you plateau.
Tip: The Pros and Cons Lifting Belts
Will using a lifting belt really weaken your core? Here's what you need to know.
I, Bodybuilder 1 - Shoulders - Tuesday
Build muscle as fast as humanly possible — week after week — until you see a body in the mirror that you barely recognize.