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. 2017 Feb 22;117(5):1911–1934. doi: 10.1152/jn.00555.2016

Fig. 10.

Fig. 10.

The NSM neurons mediate locomotory slowing. A: optogenetic stimulation of the head serotonergic neurons (ADF and NSM) causes tail paralysis and reduced head activity. B: illumination of the posterior of the worm (HSN) fails to produce slowing. C: schematic indicating the body coordinate, with two regions provided as examples. D: amplitude of bending (mean and SE) along the worm body while portions of the body are illuminated by blue light. E: illumination of small subregions of the head, which likely stimulate the cell bodies of NSM (body coordinate 0–9%) and ADF (body coordinate 12–21%).