= Contact inhibition of locomotion
<Contact inhibition of locomotion> is a contact-triggered change of protrusions and movement direction. It is distinct from <contact inhibition> of proliferation. In <neural crest> experiments, <cell> collisions caused protrusion collapse and <repolarization>; blocking noncanonical <Wnt signalling> disrupted the response.<Contact inhibition of locomotion in vivo controls neural crest directional migration by Carlos Carmona-Fontaine and others>[Collision and signalling-perturbation experiments]{ref}
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