Ratanasutra, you mentioned for the family to do a lot of pujas for those in coma. Yes that will help to collect merits but what about the mind? Does puja help at all?
The merit that accumulate from pujas does not go to the body of coma people but it will go to the mind as when time of death come, only mind that go to take rebirth in new body. In this case the merit go together with the mind, so if in the case that the coma people not recover from coma, it will carry on with the mind to future life and at least it could be only the merit they have accumulated from this life.
I found interesting of one coma case to share. Of course its not every case of coma have result like this.
Buddhist chants help revive Cheltenham coma manGloucestershire Echo, April 17, 2012
Cheltenham, UK -- WHEN pensioner Frank Soo suffered horrific head injuries in a car accident in Cheltenham, doctors gave him little chance of survival.
HEARTENED: Frank Soo and his wife of 49 years, KittyThe 73-year-old, who lives in Pittville, was left in a coma for five days, clinging to life by a thread.
In a desperate bid to stimulate his senses, relatives played Buddhist chanting in his ward at Cheltenham General Hospital.
Amazingly, he began to respond within minutes, opening his eyes for the first time.
Now he is talking, moving and eating – albeit from his hospital bed – and looks set to confound medical experts by making a full recovery.
His daughter Karen Soo, 39, said: "It has been an incredible turnaround.
you can read more details from
http://www.buddhistchannel.tv/index.php?id=3,10845,0,0,1,0You also suggested for those with multiple personalities to hold vows, engage in retreats, etc - in their condition, they are not even able to hold on to being one person, let alone many personalities - how can we expect them to hold vows or engage in retreats?
Its can be just a vegetarian vow which i think is possible for anyone to hold it, on top of that they also can release animals like fishes, birds as well. For the retreat, if they are unable to do it, we can play mantra cd for them to listen as least they hear mantra every day which at least plant Dharma seed in their mind.