abnormal fear/anxiety-related behavior abnormal freezing behavior 2017-05-22T15:58:02Z MP:0020420 any anomaly in the behavior defined as total cessation of movement apart from respiration or eye movement with the animal remaining alert with strong muscle tone; typically a response to potential danger abnormal freezing behaviour In most prey animals this is part of a predator avoidance response, with the individual assuming a hunched posture