Breaths through the nostril

[Totoro]

Sometimes our breath comes out primarily through the left nostril, sometimes the right, sometimes equally. I read something before that this has some significance in terms of health or our mental state but can't remember much. Can anyone please elucidate on this, if appropriate? Thanks.

[Clarence]

CNN's Guru Yoga book has info on it. Also, check the Yantra Yoga book. Oops, see that this is TM forum.