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Traditional neurotoxicity assessment using in vivo animal studies are impractical for testing the substantial number of environmental chemicals that currently lack data and in the early detection of neuro-related adverse reactions in drug discovery. The NAMs, including human in vitro assays and small model organisms, have been developed for faster and cost-effective assessment of neurotoxic potential. While NAMs offer improved practicality, utility, and valuable mechanistic insights, their integration into regulatory decision-making requires robust scientific validation and technical characterization. Confidence in and regulatory application of NAMs data can be supported by mapping cellular outcomes to neuropathological findings in mammals, including humans, through the Adverse Outcome Pathway (AOP) framework, and the Integrated Approach to Testing and Assessment (IATA). 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