Fig. 4. Spectra from cross-spectral analysis, describing the coherence (solid
lines) and phase relationship (broken lines) of frequency oscillations between
fH and fV. All plots are from a single
individual with: (A) a high
O2 due to
surgery and placement in a respirometer; (B) a low
O2 after 120 h
undisturbed starvation; (C) a high
O2 due to
ingestion of a 5%b.m. ration; (D) a high
O2 due to
bilateral vagotomy.