Apart from morphological, biochemical, and genetic alterations induced by teratogen compounds, there is an increased interest in characterizing behavioral alterations. Behavior is a sensitive parameter that can provide information regarding developmental disruptions non-invasively. Behavioral disturbances interfere with animals' capacity to cope with the environment, having an impact on the organism's life. Hereby, behavioral assays consisting of recording larvae in multi-well plates, Petri dishes, or cuvettes and video analysis using adequate software, allowing teratogen screening of behavior, are proposed. Examples of how to evaluate locomotor, anxiety-like and avoidance-like behaviors, and the integrity of sensory-motor functions and learning are discussed in this chapter.
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