Velocity of action potential in giant axon at 23°C

Value 33 m/s
Organism Squid Loligo
Reference Bullock TH, Horridge GA (1965). Structure and Function in the Nervous Systems of Invertebrates. San Francisco: W. H. Freeman vol I p.137 table 3.2
Method Most determinations were made with intracellular electrodes
Comments Axon diameter is 500µm. Values given have usually been measured with very little saline shunt and would be appreciably higher-up to 50%-in sea water or in the animal.
Entered by Uri M
ID 108960