When i searching i found in this link http://www.bodybuilding.com/exercises/d ... iceps-curl
that i can target inner biceps and here no mistake in terminology because no assistant muscle can make this movement
And when search in our site http://exrx.net/Muscles/BicepsBrachii.html
Found the samething
Can explain it because soon i will be mad :)
Inner biceps is probably the short head of the biceps which lies inside and the outer head is the long head of the biceps. As the name implies BIceps consists of 2 heads: the short and the long one.(you see hear the two heads clearly seperated : http://img236.imageshack.us/img236/6420 ... ontvz8.jpg
) The wider the grip on a barbell curl the more you emphasize the inner head, the closer the grip the more you emphasize the long head. Also the thumb/wrist position is important. the short head gets more emphasized when doing work with a supinated hand, while the long head also works when moving weight with a neutral grip. The most injuriesof the biceps occur in the long head, the long head is also the one who gives a peak (IF your biceps tend to peak) because he lies higher as can be seen very clearly in the pic. Im not sure if a complete isolation is possible. I also wouldnt worry much about the different heads. if you want to get big biceps, use compound movements like back rows or pullups with a supinated(palms facing you) hand and in addition maybe isolation ( for example in case your arms do not grow proportionally or you have very long arms which make your arms still appear small in comparison the the rest of the body) that will hit BOTH heads very well. What i find impossible is targetting the LOwer portion of the biceps and the upper portion since the muscle fibres run from top to bottom it would give no sense. i hope you can understand my english xD.
Well Jeannay, Posterior deltoid is listed as a synergist because in general it is, however it's not really with the grip shown. The muscle does contract a little during adduction, but it's not really doing anything. That's why I prefer a more narrow grip on vertical pulling.
You are right! i was definately wrong, a more narrow grip emphasizes much more the rear delts! Sorry. Now I can remember the soreness of my rear part of the delts when i tried to learn muscle ups to swing over the bar. i do believe though that the rear delts play a role(maybe stabilization or something) in adduction even if its not listed here.