sentence: In our analysis , we relied on previously described methods to classify neurons based on physiological firing patterns , and identified tonic , phasic , and delayed cells ( Yoshimura and Jessell 1989 ; Lopez ‐ Garcia and King 1994 ; Grudt and Perl 2002 ; Sedlacek et al. 2007 ; Davies and North 2009 ; Alba ‐ Delgado et al. 2015 ) .