Compared to LGI1-antibody-negative cats, orofacial automatisms (73 % vs. 47 % (26/55), pcorr = 0.024), salivation (73 % vs. 42 % (23/55), pcorr = 0.004), and mydriasis (66 % vs. 35 % (19/55), pcorr = 0.004) were all significantly enriched in the antibody-positive group. This evidence concerns the gene LGI1 and Mydriasis.