Schematic diagram of activation of afferent fibers with sine-wave stimuli. The pie showed the number of three types of rat DRG neurons as reported by Djouhri et al . The height represented normalized AP frequencies produced by sine-wave stimuli in the three types of fibers in our study relative to those by natural stimuli reported previously . This figure shows the selectivity of the sine-wave stimuli to activate afferent fibers as described in 'Discussion'.
Koga et al. Molecular Pain 2005 1:13 doi:10.1186/1744-8069-1-13