Step Analysis, LLC 1 article published in JoVE Behavior Evaluating Skilled Prehension in Mice Using an Auto-Trainer Robert Hubbard1, Jason Dunthorn2, Richard J. O’Brien3, Dan Tasch2, Uri Tasch2, Steven R. Zeiler1 1Department of Neurology, Johns Hopkins University, 2Step Analysis, LLC, 3Department of Neurology, Duke University Method to assess the impact of training on motor skills is a useful tool. Unfortunately, most behavioral assessments can be labor intensive and/or expensive.We describe here a robotic method of assessing prehension (reach-to-grasp) skill in mice.