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Testosterone Tied to Memory

The researchers found that word retention among men undergoing testosterone deprivation decreased rapidly only two minutes after they learned words, even though they were able to initially learn words as well as healthy men.

This rapid decline in memory suggests that the lack of testosterone impacts the function of the hippocampus, the part of the brain that controls learning and memory.

"When you look at their memory, they're perfectly normal when they're immediately asked to recall something, but they can't hold or save the information as well in order to recall it over a retention interval, over a period of time. They're faster at forgetting," study co-author Jeri Janowsky, a professor of behavioral neuroscience and neurology, said in a prepared statement.