Very much. Due to emotion instability (or psychological instability, there are several types), the hormones can take effect on the brain causing uneased aggression within the body that a person would want to exhibit. An example of this would Bipolar disorder which is an emotional disorder and can cause people to either feel a extreme amount of sadness or an extreme amount of anger (aggression, frustration, irritability).
This disorder is definitely not the only example of how this linkage is significant.