TABLE 1.

Characteristic Findings in Autism and in Mercury Poisoning

AutismMercurism
MotorStereotypiesAtaxia, dysarthria
VisionNo abnormalityConstricted visual fields
SpeechDelay, echolaliaDysarthria
SensoryHyper-responsivenessPeripheral neuropathy
PsychiatricSocially aloof, insistence on samenessToxic psychosis; in mild cases, nonspecific depression, anxiety
Head sizeLargeSmall