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Synaptogenesis is a critical process in nervous system development whereby neurons establish specialized contact sites which facilitate neurotransmission. Early life exposure to chemicals can result in persistent deficits in nervous system function at later life stages. These effects are often the result of abnormal development of synapses. Given the large number of chemicals in commerce with unknown potential to result in developmental neurotoxicity (DNT), the need exists for assays that can efficiently characterize and quantify chemical effects on brain development including synaptogenesis. The present study describes the application of automated high content image analysis (HCA) technology for examining synapse formation in rodent primary mixed cortical cultures. During the first 15days in vitro (DIV) cortical neurons developed a network of polarized neurites (i.e., axons and dendrites) and expression of the …