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The Science Behind Yoga and Stress

The Science Behind Yoga and Stress

access_time June 7, 2016 chat_bubble_outline 0 comments

What does bending your body into yoga poses do to your brain chemistry and nerve connections?

There are two functional parts of the brain that play a key role in stress. These serve the functions of emotion and cognitive function. So I am calling them the ’emotional’ brain (amygdala and its connections and medial forebrain structures including the medial prefrontal cortex) and the ‘logical’ brain (the dorsolateral prefrontal cortex, other parts of the prefrontal cortex, parts of the cingulate cortex and parts of the hippocampus).

The emotional brain is able to initiate a ‘stress response’ via the sympathetic nervous system which culminates in adrenaline and cortisol racing through our circulation.The logical brain is always trying to ‘turn-off’ this stress response and it is also trying to restrain the emotional brain. The stronger our logical brain, the better it becomes at doing these two things. When the stress response is ‘turned off’, our parasympathetic nervous system signal is ‘turned on’. This signal ‘relaxes’ the body. So a strong logical brain goes hand in hand with relaxation.

The stress response and ‘relaxing’ signals travel through the body along a particular route and parts of this route have little ‘switches’ which we can physically manipulate to turn the signals on or off. The neck is an example of where such switches are located (by the carotid arteries).

Everytime we are holding a posture our logical brain is being activated“Everytime we are holding a posture our logical brain is being activated”

Training the stress circuit

Yoga is training this entire stress circuit at two levels. First, every time we are ‘holding’ a posture, staying very still to concentrate or trying to balance, our logical brain is being activated. When we are bending forwards, our ‘relaxation’ signal is being turned on through the ‘switches’ in the neck. So bending forwards and concentrating at the same time is triggering both the logical brain and the relaxation signal at the same time.

Bending backwards triggers the stress response signal through the switches in our neck. Contracting a muscle also triggers the stress response signal. So, when we bend backwards and contract our muscles while still having to stay still and concentrate on balancing, our logical brain is given an extra challenge. It has to overcome the stress response signal being triggered in these two ways before we can be still and concentrate during a posture. This ‘extra’ resistance the logical brain is having to work against, ‘trains’ it like a muscle.

New circuitry that enables you to find it easier to control your thoughts is formed“New circuitry that enables you to find it easier to control your thoughts is formed”

Rewiring the nerve connections

At the end of a series of yoga postures, the logical brain has had a ‘workout’. It is buzzing with activity. You feel mentally calm as it is keeping your emotional brain quiet. Training the logical brain in this way for a long time can result in a rewiring of the nerve connections within the logical brain. New circuitry that enables you to find it easier to control your thoughts is formed. You may find it easier to channel your thoughts in the direction you want and not ‘dwell’ on negative thoughts or experiences. This is partly why yoga seems to have a positive effect on depression and anxiety, where sufferers have a tendency to dwell on negative life events. Stronger connections within the logical brain keeps the lid down on the emotional brain and the stress response. This is why yoga can be so effective at battling stress.

The key thing to do is to attempt yoga postures which are structured in a well-formulated sequence where each posture involves a long hold. Then your yoga and stress will begin to be balanced.

If you have any comments or thoughts, please share them below.  As we say, sharing is caring. 🙂

Source: http://upliftconnect.com/yoga-and-stress/

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