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Fig. 10. nAChR antagonists can also enhance synaptically evoked responses in the
myenteric plexus. (A) High-resolution image of a myenteric ganglion (inverted
grey scale), showing three individual neurones identified by numbers. (B)
Pixel map of the NeuroCCD-SM camera depicting, in dark grey, the area of
interest. Notice that, as in Fig.
8, the highlighted area is considerably bigger than the ganglion
itself. (C) Low-magnification image of the preparation (20x),
illustrating the location of the stimulating electrode (Es) with
respect to the recording area. (D) Experimental protocol. (E) Spatially
averaged optical outputs from the dark-grey pixels in B (represented by bars
whose heights indicate the amplitude of the voltage change under each
experimental condition in the row labelled `Ganglion') and from the pixels
that outline neurones 1, 2 and 3 (`Cells'). Magnification, 100x.
`Ganglion' signals were high-pass filtered at 6.6 Hz. `Cell' traces were
unfiltered.
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