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Effects of occupational exposure to elemental mercury on short-term memory capacity.

Authors
Smith-PJ; Langolf-GD; Goldberg-J
Source
University of Michigan at Ann Arbor, 1982 Jan; :1-30
Link
NIOSHTIC No.
00133953
Abstract
The neurotoxic effects of chronic exposure to elemental mercury (7439976) were investigated in workers in a chloralkali facility. The Wechsler digit span and short term memory (STM) span were used. Tests were given twice, with sessions 3 months apart. Urine samples were taken and 50 percent threshold spans were evaluated as a function of session and urinary mercury content. The Wechsler digit span was not very precise for measuring STM; the variance was high within subjects. There was no significant relationship between Wechsler digit span and urinary mercury concentrations. The 50 percent threshold STM span reduced the within subject variance from 1 to 0.15 digits. The STM span decreased substantially as mercury exposures increased. Decrements in STM span from aging were compared. Exposure to 0.20 milligrams per liter of mercury had the same effect on the 50 percent threshold span as increasing the worker's age from 20 to 44.
Keywords
NIOSH-Grant; Medical-monitoring; Neuropathology; Poisons; Metal-poisoning; Brain-disorders; Psychological-disorders; Safety-research
CAS No.
7439-97-6
Publication Date
19820101
Document Type
Final Grant Report
Funding Amount
282722
Funding Type
Grant
Fiscal Year
1982
NTIS Accession No.
PB84-238344
NTIS Price
A03
Identifying No.
Grant-Number-R01-OH-00707
NIOSH Division
OEP
Priority Area
Psychologic Disorders; Psychological-disorders
Source Name
University of Michigan at Ann Arbor
State
MI
Performing Organization
University of Michigan at Ann Arbor
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