MN4 is a class of Motor Neuron in Hermissenda
- soma size 20-30 microns
- located centrally on ventral surface of pedal ganglion
- axon in nerve p2
- resting potential approx -40mV
- action potentials approx 40mv
- Prolonged high frequency bursting activity time-locked with bursting on nerve nerve 2.
- increased firing in response to illumination