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. Author manuscript; available in PMC: 2010 Dec 10.
Published in final edited form as: Neuron. 2009 Dec 10;64(5):692–706. doi: 10.1016/j.neuron.2009.10.004

Figure 4. Odor concentration determines oscillation coherence, not frequency.

Figure 4

(A) EAG traces revealed total ORN output increased with odor concentration. Example from one antenna; horizontal bar: 4 s.

(B) Summary. EAG amplitude (first 1 s, see bracket in [A]) evoked by a range of odor concentrations. Mean±SE; n=8; 2-way ANOVA: fodor_concentration=16.84, p<0.0001.

(C) Higher concentrations of odor evoked stronger LFP oscillations. Initial portions of the odor response are shown. Scale bar: 50 ms.

(D) The frequency of fast oscillation changed not at all or only slightly across a broad range of odor concentrations. All results are shown (dots); bar graph shows means, n=9. Leftmost bars: basal oscillatory power in absence of odorant. Hexanol: 2-way ANOVA: fhexanol_concentration=6.16, p<0.001; post hoc Tukey-Kramer tests found small but significant differences between three highest and two lowest concentrations (p<0.05). Octanol: foctanol_concentration=4.98, p<0.001; post hoc tests: significant differences between highest two and lowest two concentrations of octanol (p<0.05); Geraniol: 2-way ANOVA: fgeraniol_concentration=1.4, p>0.25, ns.