From WordNet (r) 3.0 (2006) [wn]:
nerve centre
n 1: a center that provides information and control; "the nerve
center of the diamond industry is in Amsterdam" [syn:
nerve center, nerve centre]
2: a cluster of nerve cells governing a specific bodily process;
"in most people the speech center is in the left hemisphere"
[syn: center, centre, nerve center, nerve centre]