However, some NMDAR-Ab-injected mice displayed visual signs of seizures, and 5/7 exhibited a phenotype which involved dyskinetic hind limb clasping when suspended by their tail, which was not observed in the control mice (p b 0.0001; video available) Cognitive ability was examined throughout the 40 days using the T-maze, a task of working memory which assesses the natural tendency of mice to alternate their choice of goal arm (spontaneous alternation).