Stress and Digestion- The Deep Connection between the Nervous System & Digestive Health
- angelalynnholmes
- Jan 2, 2019
- 4 min read
Updated: Jan 27
The age-old adage "trust your gut" is more scientifically grounded than you might think. Modern research shines a light on the profound interconnectedness of the gut and the brain, a dynamic duo intricately linked by a complex communication network known as the gut-brain axis. This term describes the bidirectional communication between your digestive system and nervous system, which can significantly impact both mental and physical health.

"All disease begins in the gut" - Hippocrates
Stress, emotions, and mental health impact digestion and how gut health influences mood and cognitive function.
Stress and the Gut-Brain Interaction
At the heart of this axis are millions of neurons embedded in the walls of your gut, forming what some scientists call the "second brain," or enteric nervous system (ENS). This system can operate independently but also communicates with the central nervous system. Chemical messengers called neurotransmitters, produced in abundance in the gut, are key players in this communication. For instance, about 90% of the body's serotonin—a neurotransmitter that affects mood, emotion, and sleep—is produced in the gut, highlighting a fascinating overlap between digestive health and mental well being.
Stress and the Gut-Brain Interaction
Stress has a dual impact on the gut-brain axis. During stress, the brain sends signals that can alter the gut’s function, leading to issues like irritable bowel syndrome (IBS) and inflammation. Conversely, irritation in the gastrointestinal system can send signals to the nervous system that trigger mood changes, forming a vicious cycle between gut health and mental stress. As noted by John F. Cryan, a prominent researcher in the field of neuroscience, "In times of stress, these interactions can go awry and potentially progress to mental health disorders."
How Gut Health Influences Mental Wellbeing
Modern research exemplified by a 2011 study by Cryan and Dinan published in Nature Reviews Neuroscience underscores the influence of gut microbiota on psychological health. The trillions of bacteria inhabiting your gut—collectively known as the microbiome—not only aid digestion but significantly impact brain function and behavior. When the gut microbiome is in balance, it can foster improved mood and cognitive function. Conversely, dysbiosis, an imbalance in the gut microbiota, is linked to anxiety, depression, and other psychiatric disorders.
Improving Gut-Brain Health
Addressing digestive health is a multi-faceted approach that can benefit mental and emotional wellbeing. Practices that support both digestive and cognitive functions include:
1.Probiotic and Prebiotic Intake: Consuming a diet rich in probiotics and prebiotics can promote the health of beneficial gut bacteria. Foods like yogurt, sauerkraut, and fiber-rich fruits and vegetables support microbiome diversity and health. There are several ways to test which support is best for you; kinesiology muscle testing, genetic testing, researching which strains provide what aspect of wellness you are searching for.
2. Stress Management Techniques: Mindfulness practices such as guided meditation, Try simple somatic exercises, yoga, nature walks or journaling can help calm the mind and positively influence the gut-brain relationship.
3. Adequate Sleep and Regular Exercise: Both are crucial not only for optimal brain function but also for maintaining a healthy gut microbiome.
As our understanding of the gut-brain axis expands, it revolutionizes approaches to treating both digestive and mental health issues. By nurturing a balanced gut environment, you can promote emotional balance and cognitive health, embarking on a holistic path to overall well-being. As research continues to unfold, one thing becomes abundantly clear: the next big frontier in mental and emotional health might very well hinge on those gutsy little microbiomes.
Unleashing Better Digestion: The Vagus Nerve and Polyvagal Techniques
Digestive discomfort is a struggle many of us know all too well. Yet, a surprising key to improving digestion might actually lie in a nerve you may have never heard of: the vagus nerve. This unsung hero of the parasympathetic nervous system plays a crucial role in how our gut processes food. Emerging studies in Polyvagal Theory now present innovative techniques to optimize this nerve's functionality and, by extension, our digestive health.
The Vagus Nerve: Your Digestive System's Best Friend
The vagus nerve, often described as a critical part of our body's “rest and digest” system, boldly extends from the brainstem to the abdomen. It’s responsible for transmitting signals that regulate heart rate, mood, and especially digestion. When the vagus nerve is healthy and responsive, it keeps our digestive processes running smoothly. But when it's underperforming, often due to stress or lifestyle factors, we might see a cascade of digestive issues such as bloating, IBS, and slow metabolism.
Understanding and actively engaging with the vagus nerve through Polyvagal exercises can provide a lifeline to better digestion.
Polyvagal Techniques: Stimulating Your Vagus Nerve for Better Gut Health
1. Deep Breathing Exercises: This technique is one of the simplest ways to stimulate the vagus nerve. By practicing deep diaphragmatic breathing, we activate the nerve in a way that can encourage a shift from the sympathetic "fight or flight" response to the parasympathetic "rest and digest" response, facilitating improved digestion.
2. Cold Water Therapy: Exposing the vagus nerve to cold through methods like face splashing or cold showers has shown promise in enhancing vagal tone. This process triggers the nerve, potentially reducing stress and promoting a calmer digestive environment.
3. Vocal Exercises: Engaging in activities such as humming or singing can stimulate the vagus nerve indirectly. The vibrations within the throat and vocal cords activate this nerve pathway, which helps in soothing the nervous system and in turn benefits digestion.
4. Mindfulness and Relaxation Practices: Incorporating mindfulness and gentle meditation into your daily routine can improve vagal function. When focused on calming the mind, these practices effectively enhance the physical relaxation needed for optimal digestive health.
Why Embrace Polyvagal Techniques?
By harnessing the power of the vagus nerve through specially designed exercises, we can pave the way toward improved digestive health. These practices can not only aid in alleviating gastrointestinal disturbances but may also enhance overall wellbeing by reducing stress levels.
Eager to delve deeper into how you can use these captivating Polyvagal techniques to boost your digestive wellness? Stay tuned as I continue to create the Rest & Digest Polyvagal Playbook; Unleash Your Bodies Natural Ability to Heal. We will continue to unpack this intriguing area of health, share more practical insights, and guide you towards integrating these strategies into your everyday life for a more balanced and healthier digestive system, along with feeling stable, grounded and well rested. Don't let irritation in your gut hold you back—discover how nurturing your vagus nerve can lead you to a calmer, more comfortable life.
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