title: Neurological syndromes produced by some toxic metals encountered industrially or environmentally.
abstract: Toxic metals encountered industrially or environmentally may produce the following syndromes: 1) Peripheral neuropathy: which is mainly sensory in arsenic and entirely motor with inorganic lead, organophosphorus compounds and tallium produce a mixed form of peripheral neuropathy. 2) Encephalopathy: usually with lead poisoning where ataxia and hemiplegia or optic atrophy may occur. 3) Optic neuritis: transient or permanent impairment of vision in arsenic poisoning and blurring of vision followed by field fedects with thallium poisoning. 4) Cerebellar disturbances: in the form of ataxia in organic mercury. 5) Parkinsonism: extrapyramidal signs occurs in manganese poisoning shown as mask face and rigidity of muscles. 6) Mental changes: as acute psychosis in organic lead and erethism in organic mercury.
mesh_terms: D000328:Adult; D020261:Arsenic Poisoning; D001927:Brain Diseases / Q000209:etiology; D002526:Cerebellar Diseases / Q000209:etiology; D002648:Child; D004781:Environmental Exposure; D006801:Humans; D007855:Lead Poisoning / Q000150:complications; D020149:Manganese Poisoning; D001523:Mental Disorders / Q000209:etiology; D008630:Mercury Poisoning / Q000150:complications; D009422:Nervous System Diseases / Q000139:chemically induced*; D009784:Occupational Diseases / Q000150:complications; D009902:Optic Neuritis / Q000209:etiology; D009941:Organomercury Compounds / Q000506:poisoning; D062025:Organophosphate Poisoning; D010300:Parkinson Disease / Q000209:etiology; D011041:Poisoning / Q000150:complications*; D013756:Tetraethyl Lead / Q000506:poisoning; D013793:Thallium / Q000506:poisoning
chemical_list: D009941:Organomercury Compounds; D013756:Tetraethyl Lead; D013793:Thallium