This chapter describes neurologic disorders related primarily to occupational exposures along with presenting signs and symptoms. Acute or subacute occupational exposure to high levels of neurotoxic compounds, which occurred in the past and resulted in unique presentations of neurological disorders, occur infrequently today. Sections include the evaluation of toxic neuropathies and the approach to neurobehavioral impairment along with the cognitive domains commonly affected with exposure to neurointoxicants. A section describes the approach to a patient with exposure to neurointoxicants that includes the need for a temporal association between exposure and effect, a dose-effect relationship, biological plausibility, and other causes eliminated Effects of selected neurotoxins are described, including carbon monoxide, lead, organic solvents, and manganese.