Brahmari tends to make one feel good. Raise the spirits. It’s one that I find kids really enjoy, and it’s on my daily practice sheet, as prescribed by my Ayurvedic doctor.
It is reported that in one Indian prison, an inmate was set on murdering the person responsible for sending him to jail. His yoga teacher encouraged him to practice brahmari, twice a day, for a month. After that period of time, his revenge and deep-seated urge to kill, disappeared. In its place, was his love for yoga, which he began to teach at the penitentiary.
Dr. Vasant Lad http://www.ayurveda.com/about/the-ayurvedic-institute teaches that this breathing technique vibrates the pineal and pituitary glands. He says it stimulates neurotransmitters, boosts the thyroid and immunity, while quieting the mind.
In brahmari, as in most forms of pranayama, inhale and exhale through the nose. Press lightly on the pressure points in a manner that you hear the loudest buzzing and vibration in your head. Place the tongue behind the teeth as you keep the chin slightly down to engage the jalandhara bandha (chin lock).