How do helmets work?

[ebenweb]

So you guys are saying head-related afflictions are reduced or avoided with helmets and that some kind of head-targetting hit mechanism exists?

The arrow thing: are you saying guys are more likely to die by archer fire without a helmet than in melée without a helmet?

Odd that there's nothing on it in the manual. I read a formula somewhere (Wiki?) that showed helmet protection being a factor in the protection value being displayed on the unit's stat screen. Who knows if this is implying that helmets are used somehow in damage protection during a "normal" hit...