Objective To explore the changes of neurobehavioral function on the workers exposed to noise and manganese. Methods Neurobehavioral functions of 56 workers exposed to noise and 83 workers exposed to manganese and 78 exposed to manganese and noise and 81 controls were examined with neurobehavioral core test battery recommended by WHO. Results The results showed that noise group and manganese group all were significantly different as compared with the control group (P < 0.05) in two thirds test items. The joi...