Subject: Does the distance from one's centre of gravity effect coordination?

Hello,
I was recently reading about flexor and extensor muscle groups.  My question 
is, would using a flexor muscle, say the bicep, to do an activity, say put a 
dot into a square, be more accurate than using the extensor muscle, in this 
case the tricep.  My understanding of it is that is would be more accurate, 
however i'm not sure why this is so.  Does is have anything to do with a 
person's centre of gravity? 

Thankyou

Ric Porteous

Re: Does the distance from one's centre of gravity effect coordination?