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Fig. 12. Patterned motoneuron activity during walking-like movements persists after
pymetrozine treatment. Data before (A) and after (B) pymetrozine application
(0.5 µg g–1 body mass) are shown for comparison. Ai and Bi
show sample recordings; leg position, top trace (anterior is to the top, i.e.
swing phases are represented by rapid upward strokes); electromyograms (EMGs)
of tibia extensor (M106) and coxa levator/protractor (M94/95) muscles, middle
and bottom traces, respectively. Aii and Bii show corresponding averages of
leg movement (top) and time histograms of EMG discharges (middle and bottom;
bin widths 10 ms, ordinate scales normalised to number of steps evaluated).
Zero on the abscissa marks the start of swing movement; reference lines in top
traces mark lateral leg position. Note the differences in leg movement and
timing of levator activity after pymetrozine application; for details, see
text.
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