Anatomy James said:Technically they dont exist. A ganglion is a collection of neuronal cell bodies in the peripheral nervous system. A collection of these cell bodies in the central nervous system is...
It is a swelling that often appears on the joints of the hand, wrist or foot. They seem to come for no reason. And they seem to go for no reason, too! See Related Link below ads
Clams and many other lower-class animals have ganglia instead of brains. Ganglia are simply nerve clusters that function as a neurological control center (just like a brain).