Firstly lets talk about bicep brachhie which is an arm muscle everyone knows that where it is , well its is divided into 2 parts
1: Long head
Orgination: suprglanoid tubercle of scapula
Insertion :tubrosity of radius
As you could see by the locations of these insertion and origination really helps us to understand that which type of exercise hit this longa head perfectly.
See if i do incline bicepcurls at moment of time our long head strech fully as possible and this will also make it easier to achieve full range of motions. As in this poation the orogin and insertion points reaches as far as possible.
Othwr exercise like bicepcurls ,chinupa also hits this muscle specifically in exercises palm faces toward front.
2: Short head
Now lets talk about short head
Origin: Coracoid Procesa
Insertion: Tubrosity radiusfascia of forearms
Well thia muscle is little shorter but plays a good role in hypertrophy. This is placed in inner side of the arms toward your body. If we qork on this muscle its pumping pushes long head which also helps to achieve hypertrophy. See exercises like curls in which we put stress specifically on inner side of forearms or you could say simply curls in which our pinky finger tries to reach our forehead works for this muscles.
A great example of exercise is wide grip bicep curls as it tend to exceed distance between its origination and insertion points. Or if you do simple bicep curls but little extending of pinky finger towards head by rotating your fist a little that will work great for this muscle.
Strength Science India 