Brief unilateral naris occlusion decreases activity levels in bulbar excitatory neurons. A, C, Example maximum intensity projection images of bulbar M/TCs (A) or ETCs (C) visualized via SMI-32 staining, and the activity marker pS6. epl, External plexiform layer; mcl, mitral cell layer; gcl, granule cell layer; gl, glomerular layer. Arrows indicate pS6⁺ M/TCs (A) or ETCs (C). SMI-32⁺ cells located in the epl (asterisks) were not analyzed. Experimental design as in Figure 2A. B, D, Normalized pS6 intensity in M/TCs (B) or ETCs (D) from 6 sets of Ctrl and Occl mice. Empty circles represent individual cells. Different colors represent different mice. Thick line indicates mean ± SEM. ***p < 0.0001.