Fig. 5.
Group-level coherograms and coherence analysis comparing dexmedetomidine baseline to dexmedetomidine-induced unconsciousness. (A) Group-level coherogram of dexmedetomidine baseline showing relative absence of coherence in the spindle frequency band. (B ) Group-level coherogram of dexmedetomidine-induced unconsciousness, showing increased coherence in the delta, theta, and alpha frequency bands and decreased coherence in the slow-wave frequency band (solid arrow). (C ) Coherence of dexmedetomidine baseline versus dexmedetomidine-induced unconsciousness. Coherence was larger during dexmedetomidine-induced unconsciousness at 2.4–18.8 Hz (P < 0.001, two-group test coherence). Median coherence presented with 95% jackknife CIs. Horizontal solid black line(s) represents frequency ranges at which significant difference existed. Hz = hertz.