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. Author manuscript; available in PMC: 2014 Nov 1.
Published in final edited form as: Hear Res. 2013 May 31;305:10.1016/j.heares.2013.05.005. doi: 10.1016/j.heares.2013.05.005

Figure 3.

Figure 3

Tonotopic organization and excitatory and inhibitory frequency tuning of single auditory midbrain neurons. A. Coronal section of zebra finch MLd with circles marking locations of single unit electrophysiological recordings superimposed and color coded according to the characteristic frequency (CF) of the neuron recorded at that location. Color coding of unit CFs and the average power of zebra finch songs to the right of the image show that frequency tuning and the frequencies represented in songs are closely matched. B. Coronal section of mouse IC with color-coded circles marking electrophysiological recording locations superimposed. The average power spectrum of mouse social vocalization is to the right of the image showing that the majority of power in vocalizations falls above the frequency tuning of most IC neurons. The top rows in panels C and D show classic V-shaped excitatory tuning. The bottom rows of panels C and D show tuning curves with excitatory and inhibitory tuning. C. Zebra finch single unit frequency/intensity tuning. D. Mouse single unit frequency/intensity tuning.