Sleep: Is There Anything It Can't Do?

Lack of sleep has a deleterious effect on performance and reaction times, and it also "can upset our emotional equilibrium." [bold added]

Researchers have found that people who are sleep-deprived have difficulty reading the facial expressions of other people, particularly when the expressions are more subtle. [snip]

In neuroimaging studies, scientists have discovered that sleep deprivation can amplify activity in the amygdala, a part of the brain that plays a key role in processing emotions, and weaken activity of the prefrontal cortex, which is critical for regulating emotions.

(Image from pokernews)

Comments:

1) the more research that is done on sleep, the more important we're finding sleep to be;

2) don't play poker when you're tired.