Assessing neurotoxicity involves a combination of in vitro, in vivo, and epidemiological studies. In vitro studies use cultured neurons or brain slices to evaluate the direct effects of toxins on neuronal cells. In vivo studies involve animal models to observe behavioral and physiological changes. Additionally, epidemiological studies in humans help identify associations between toxin exposure and neurological outcomes. Advanced techniques like neuroimaging and biomarker analyses also contribute to understanding and diagnosing neurotoxicity.