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Fig. 8. Prosternal organ nerve (PN) activity is tonic while the head is held at
arbitrary constant positions around all three axes. (A) A constant head
position, or plateau, signified by the filled (open) circle at the beginning
(end), is illustrated. The slope of each angular plateau is between
±0.1° frame-1. (B) PN activity regressed on time during
the plateau. The slope of this line is not significantly different from zero
indicating that the PN afferents responded tonically during this period.