We have proposed an electric circuit model of the nervous axon with re
spect to signal transmission. This model consists of series of one bas
ic section, and has functions of the signal transmission identical wit
h ''neuristor'', which was proposed abstractly by H.D.Crane. In this a
rticle we present some character detectors of spatial pattern using th
is circuit model, such as a two-dimensional boundary detector, straigh
t line detector, or a detector of the direction and speed of a moving
point. Functions of these detectors were confirmed using a light sourc
e, experimentally.