What are the ganglia in a cockroach?

There are 12 major groups of CNS ganglia (ganglions) in a cockroach:

- 3 in the head:

supra-oesophageal (cerebral) ganglia

sub-oesophageal ganglia

circum-oesophageal connectives

- 3 in the thorax:

prothoracic ganglia

mesothoracic ganglia

metathoracic ganglia

- 6 in the abdomen:

first through fifth abdominal ganglia (fused from pairs)

sixth abdominal ganglia (fused from a group)

The cockroach central nervous system has a double ventral nerve cord in the thorax and abdomen.