It is not surprising that when doctors examined people who had worked at a lead smelter for years, they found no lack of neurological problems associated with lead

But not every worker was affected equally, a new study says, especially when it came to those who were good readers. While those workers had the same sorts of motor skill losses as their colleagues, they had retained much more of their thinking skills.

People who are good readers, generally a sign of better education, have been found in earlier studies to have better health. The presumption has been that this is because they can take better care of themselves or afford better food, housing and medical care.

But writing in the July 31 issue of Neurology, researchers said that in this case some smelter employees were protected not as a direct result of their reading but an indirect one. The years of reading, the study said, may have helped their brains develop more of what doctors call cognitive reserve.

After all of the reading I’ve done, my cognitive reserve must be through the roof. Not that I plan to stop building my reserve anytime soon. After all, who knows how much I’ll need later?