Movie 2
Avoidance Assay with green laser light. Behavioral responses to light in front of the animal's path. Wildtype worms have a moderate response to green light (where they turn to avoid traveling through the light), which is lost following either double eye ablation or Smed-TrpA RNAi.
The planarian TRPA1 homolog mediates extraocular behavioral responses to near-ultraviolet light
Journal of Experimental Biology 2017. 220:2616-2625; doi: 10.1242/jeb.152298