Biomedical Engineering Reference
In-Depth Information
Figure 8.3
Objects in the vicinity of a weakly electric fish distort the self-generated electric
field. The ensuing change in current flow across the skin - the electrosensory image
of the object - is monitored by electroreceptors. a) The sketch is a snapshot of the
isopotential lines of the electric field at the peak of an EOD cycle with an object of
low conductivity distorting the field. b) Short section of the quasi-sinusoidal EOD
waveform of
Apteronotus albifrons
recorded as the potential difference between an
electrode next to the head and one close to the tail. c) Sketch illustrating the rela-
tionship between amplitude modulation waveform (AM) and the underlying EOD
carrier signal.
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