Figure 2: Towards a holistic systems neuroscience of social facial expressions.

(a) Anatomical drawing of the rat whisker motor plant (Haidarliu et al., 2010) (b) Estimating the functional anatomy of the rat whisker musculature (Hill et al., 2008) (c) Biomechanical model of the rat whisker motor plant (Haidarliu et al., 2011) (d) A computational model of a realistic rat whisker field interacting with a complex scene (Zweifel et al., 2019) (e) A robotic system for simultaneous stimulation of 24 individual whiskers (Goldin et al., 2018) (f) A head-mounted camera system for mice (Meyer et al., 2018) (g,h) Head-mounted, physiological sensors systems for recording of sniffing, nose movements and head-bobbing in rats (Kurnikova et al., 2017) (i) Automatic whisker tracking in a freely moving mouse (Gillespie et al., 2019) (j) Using fluorescent dye to visualize single whiskers within the whisker field (Rigosa et al., 2017). Permissions: (a) reproduced from (Haidarliu et al., 2010) with permission from Wiley and Sons (b) reproduced from (Hill et al., 2008) with permission, copyright 2008 Society for Neuroscience, (c) reproduced from (Haidarliu et al., 2011) with permission from Wiley and Sons, (d) With permission from N. Zweifel and M. J. Z. Hartmann, (e) reproduced from (Goldin et al., 2018) under a CC BY 4.0 license, (f) reproduced from (Meyer et al., 2018) under a CC BY 4.0 license, (g-h) reproduced from (Kurnikova et al., 2017) with permission from Elsevier, (i) reproduced from (Gillespie et al., 2019) with permission from Elsevier, (j) reproduced from (Rigosa et al., 2017) under a CC BY 4.0 license.