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How chanting OM affects your physiology

9
  • by olgakabel
  • in yoga for your energy · yoga for your mind
  • — 9 Dec, 2015

When my son was little, I used to sing lullabies to him. Unfortunately, most of the time I couldn’t remember the exact words of the song, so I ended up humming the melody instead. As a result both of us would usually doze off. Soft humming can have a very soothing effect both on the listener and the singer. Try it for yourself. Listen to this simple song – how does it make you feel?

Last week we talked about “charging” and “dis-charging” sounds. This effect will be present if you are listening to any external sound. So listening to a lullaby would have a dis-charging effect. This effect will be amplified if you vocalize the sound (sing or hum along). Try it with the song above. When you hum along does it feel like you internalize the sound even more? I like to think of sound on the following continuum:

1. Listening to sound (sound vibrations received through the ear from external environment) – focus is more external.
2. Listening and humming along (sound vibrations received through the ear from external environment and from the throat in the internal environment) – external focus is beginning to move inward.
3. Just humming to oneself (sound vibrations received from the throat and through the ear in the internal environment) – focus is internalized.
4. Humming mentally and paying attention to it – this makes the focus even more internal.

Chanting stagesThat’s one way to move your attention from external to internal for better body awareness and better concentration. That’s why when we chant in yoga we usually follow the same steps: 1. Teacher chants 2. Students chant with the teacher 3. Students chant on their own 4. Students chant mentally to make the sound vibrate in the mind alone. Since a big part of a yoga practice is moving from a more gross manifestation of things to a more subtle experience, working with sound gives us an opportunity to manifest that movement in a pretty straight forward way.

Chanting OmWhy do we chant in yoga anyway? What is the purpose? Well, according to this study chanting OM promotes limbic deactivation, which is a fancy way of saying that it takes the edge off our basic emotions (fear, pleasure, anger) and drives (hunger, sex, dominance, care of offspring). In this study the researchers compared chanting Om with making “ssss” sound while the subjects were getting an MRI. They found that during Om chanting the regions of the brain that became deactivated (amygdala, anterior cingulate gyrus, hippocampus, insula, orbitofrontal cortex, parahippocampal gyrus and thalamus) were the same regions that became deactivated during electrical vagus nerve stimulation for treatments of epilepsy and depression. Since effective ‘OM’ chanting is associated with the experience of vibration sensation around the ears, the scientists suggested that this sensation is transmitted through the auricular branch of the vagus nerve. Saying “sss” sound didn’t facilitate any activation or deactivation in the same areas of the brain.

Humming

This is exciting stuff. While the scientists are NOT saying that we should chant OM to treat epilepsy, they are saying that simple non-invasive OM chanting has a similar effect on the brain and vagus nerve as implanted electrical devices. For our purposes it confirms that chanting has a dis-charging effect on the brain, meaning that it discharges us from compulsive thinking, wanting and grasping. One component that the study didn’t address is the question of whether or not the OM sound was meaningful to the participants. The meaning of sound can significantly amplify our response to it – it all depends on the mental associations that you have with that sound. Just like if you know the movie Pan’s labyrinth that the lullaby above came from, you might have a different response to the song.

OM is probably not the only sound that would produce the dis-charging effect on our brains. The main difference between OM and “ssss” sound that the scientists used is that both letters O and M are vocalized, meaning that they make your vocal cords vibrate and create resonance in your throat and around your ears. As we mentioned last time, the vagus nerve branches out into your inner ear and your larynx, controlling the opening and closing of the vocal cords and sound pitch. It sounds like it gets stimulated during vocalization. On top of that, we always chant on the exhalation, which means that the vagus nerve is activated in its role as parasympathetic system manager, AND chanting usually facilitates lengthening of the exhalation, which further amplifies the parasympathetic effect.

bee breathThat is why it is no surprise that soft humming of a song can have a similar effect and so does Bhramari pranayama (bee breath). To practice Bhramari you lengthen the exhalation and make a long one-tone M sound, which is basically humming. One would expect that the same areas of the brain might become activated here as the sound is very similar to OM. Nobody has studied the effect of this particular pranayama on the brain activity (as far as I know), but it does not prevent yoga teachers from claiming that “With regular practice of a pranayama called bhramari, bliss arises in the heart. It can also relieve insomnia, sinus infections, thyroid problems, and stress.” If this type of chanting facilitates the parasympathetic response and stimulates the vagus nerve, the potential is certainly there.

So next time when you sense that your emotions are about to overcome you, try soft humming of your favorite song or Brahmari pranayama and see it makes a difference!

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Tags: chantinghummingchanting omeffects of sound in yoga

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9 Comments

  1. Tom says:
    December 10, 2015 at 5:50 pm

    Thanks Olga for posting this research. It reminds me of Paramahansa Yogananda speaking on chanting & affirmations moving from the conscious mind (vocalized) to the subconscious (mental) and finally to super-consciousness as we internalize them.

    Reply
  2. awakenedsoul says:
    December 11, 2015 at 4:12 pm

    Wonderful post. This is so true. Chanting has always been one of my favorite aspects of yoga. It relaxes and calms me.

    Reply
  3. Gosia says:
    December 18, 2015 at 2:49 pm

    As always- FANTASTIC article!
    Thank you Olga!!!!!!!!!!!!!!

    Reply
  4. Natalia Rozycki says:
    August 11, 2016 at 1:35 pm

    Hello!

    I am simply blown away by this site. So much useful and helpful information . I am an new teacher, and I found so much great information to sequence my first class. Thank-you so much, I will be coming by often. Keep up the great work!!

    Reply
    • olgakabel says:
      August 11, 2016 at 1:38 pm

      Thank you Natalia; it’s lovely to hear!

      Reply
  5. Fatema says:
    January 24, 2017 at 8:49 am

    Well explained………. amazing site and such helpful tips …… thank you so much☺️

    Reply
  6. malaysha says:
    July 10, 2017 at 12:38 am

    Wow! I always knew that mantras helped me during my meditations. So much so that I wrote about it here http://malaysha.com/mantra-mindfulness/ thank you for breaking it down via science for me 🙂

    Reply
  7. Asit Nema says:
    February 1, 2019 at 4:56 am

    Thanks for this wonderful scientific assessment of chanting of OM. Will be grateful if you can share details of the study for reference purpose – when and where was it carried out, by whom, how many subjects were involved, etc. It will help in my current research on mantra chanting. Best.

    Reply
  8. tejas parikh says:
    September 23, 2021 at 1:32 am

    I can do prolong exhalation upto 50 seconds with om 🕉 chanting .is it similar to co2 tolerance?

    Reply

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