Receptor-activated non-selective cation channel involved in the nose-touch response and foraging behavior. Contributes to the neural responses of sensory neurons to touch, particularly after repeated mechanical stimulation. Has no apparent role in thermosensory or chemosensory behaviors. Homotetramer. Expressed in many sensory neurons, including OLQ and IL1 neurons. Worms exhibit specific defects in mechanosensory behaviors: abnormal head withdrawal reflex, defective reversal behavior in response to nose-touch and foraging behaviors. Belongs to the transient receptor (TC 1.A.4) family. The power behind pain - Issue 82 of May 2007