Is this a question of
picking from the
a) fingers
b) wrist
c) elbow

?? cuz those are the three different picking patterns
if soo theres been posts made about this ages ago - (back in the day when i check this forum everyday! - waaait that was back in january!) just search for picking related questions.

i for one pick using my fingers and change strings using my elbow and a bit of wrist - but its all in the fingers holding the pick.