1/f Fluctuations in the Spontaneous Spike Discharge Intervals of a Giant Snail Neuron

It has been found in a tonically autoactive neuron (TAN) of an African giant snail that spike discharge interval fluctuations have a power spectral density that is inversely proportional to frequency (the 1/f spectrum). This result was obtained when the suboesophageal ganglia which contained the TAN had been removed from the snail body.