Neurological and Behavioral Toxicology of Increased Lead Absorption.
NIOSH 1976 Feb:51-57
Neurologic symptoms, illustrated by three case histories, play a prominent part in acute lead (7439921) poisoning and growing evidence suggests an etiologic role of chronic increased lead absorption in several chronic neurologic diseases. A type of motor neuron disease characterized by symmetrical distal muscle wasting, slow progression, and a history of extensive exposure to lead was reported. Although response to chelation therapy was inconclusive, a therapeutic trial of chelation in any patient with motor neuron disease and history of major lead exposure was recommended. Delayed nerve conduction was demonstrated in guinea pigs slowly poisoned with lead acetate (301042), and subsequently, electrophysiologic abnormalities were found in asymtomatic lead workers. Because of these and other similar findings, neurologists and behavioralists are questioning the adequacy of present standards of safe lead absorption.
NIOSH-Author; NIOSH-Contract; Contract-210-75-0026; Chronic-toxicity; Behavior; Age-factors; Mental-processes; Nervous-system-disorders; Neuromotor-disorders; Toxicology; Heavy-metals;
DHEW (NIOSH) Publication No. 76-134
Special Populations; Work Environment and Workforce;
Health Effects of Occupational Lead and Arsenic Exposure, A Symposium, NIOSH