Electric Organ and Electric Organ Firing

The electric organs of weakly electric fish are derived myogenically, from muscle cells, or neurogenically, from nerve cells. The electric organs consist of stacks of disc-shaped electrocytes lined with insulating nonconductive connective tissue. The midline medullar nucleus in the brain, or pacemaker nucleus, is responsible for regulating the firing of the organ by signaling through supramotornuerons in the spinal cord.