vThe relationship between performance on cognitive tasks and circulating levels of lead in blood and accumulated levels of lead in bone was examined in 141 middle-aged
and elderly men. Men with
higher levels of blood and bone (tibia)
lead copied spatial figures less accurately; men with higher levels of bone (tibia) lead had slower responses
for pattern memory. These findings suggest that low levels of lead contribute to impairments in
cognitive function among elderly men.
Payton M, Riggs KM,
Spiro A 3rd, Weiss ST, Hu H
Relations of bone and blood lead to cognitive function: the VA Normative Aging Study.
Neurotoxicol Teratol 1998 Jan-Feb;20(1):19-27