Barbarian Rage and unconsciousness

[Farabor]

So, when a barbarian gets knocked unconscious while in a rage, then gets woken up by the friendly cleric later that round, how does that work?

Is his rage ended? If so, does he still suffer from the round of fatigue? IF not, can he immediately re-enter a rage next round?

[Fuzzy-Wuzzy]

It's not clear to me whether being unconscious ends your rage. (I think it should, but dunno if it does.) However, I can state that if it does,then you both suffer fatigue and can't rage next round:

page 53, Rage wrote:

After you have stopped raging, you lose any remaining temporary Hit Points from using the Rage action, you can’t use Rage again for 1 round, and you are fatigued for 1 round. You can’t voluntarily stop raging. If you stop raging before its usual duration expires, you are fatigued and can’t Rage again until after the end of your next turn.

Note that these effects would kick in the moment you stop raging, i.e. the moment you fall unconscious, not the moment you wake up, if it matters.

[Xalemich]

I really wanted to tell you that the key to this question is in the 'Concentrate' key-word, and that obviously you can't concentrate on being enraged while you are unconscious, but the Trait Appendix only states:

'Concentrate -It takes a degree of mental concentration and
discipline to use this type of action.'

So I really don't know what to say...