The truth is that the mind and body are intimately connected. What is also true is that this relationship is not only dynamic but also asymmetrical. While the body undoubtedly influences the mind, the mind ultimately holds the supervisory role. Understanding this interaction is essential for psychological well-being and overall health.
At the heart of the mind-body connection is the vagus nerve; the longest cranial nerve in the body. It plays a central role in the parasympathetic nervous system, which is responsible for “rest and digest” functions. The vagus nerve travels from the brainstem to the abdomen, connecting the brain with vital organs, including the heart, lungs, and gut. This nerve facilitates bidirectional communication between the brain and the body, particularly in regulating stress responses. When the vagus nerve is well-toned (i.e., functioning effectively), it helps calm the body after stress, lowers heart rate, reduces inflammation, and supports digestion. It also plays a part in emotional regulation, social engagement, and even the experience of empathy.
Practices like deep diaphragmatic breathing, meditation, humming, cold exposure, and regular physical activity can stimulate the vagus nerve and enhance vagal tone. This helps the nervous system shift from states of chronic stress to states of calm and regulation, which are essential for psychological resilience.
When we consistently neglect our bodies through poor nutrition, lack of sleep, chronic stress, substance use, or sedentarism, we place a burden on our psychological well-being. The brain depends on the body to provide the energy and biological support for optimal functioning. A tired, malnourished, or inflamed body can lead to cognitive fog, mood swings, irritability, and even more serious mental health conditions, such as depression and anxiety.
In trauma-informed psychology, for example, we observe how chronic dysregulation in the body, especially in the autonomic nervous system, can reinforce emotional and cognitive patterns associated with threat, fear, and helplessness. The body can become “stuck” in survival states, affecting how the mind perceives and reacts to the world.
However, while the body influences the mind, the mind is the master regulator. It holds the capacity for reflection, insight, decision-making, and intentional change. It is through the mind that we can choose to care for our bodies, regulate our nervous systems, and reframe our narratives. In other words, the relationship is dynamic but not equal. The mind has the executive function: the ability to direct behavior, override automatic responses, and cultivate new patterns. This is why therapeutic work often starts with awareness and insight: by helping clients understand their patterns, they can begin to make intentional choices that change both their mental and physical states.
Disclaimer:
This information is intended for educational purposes only and does not substitute for professional psychological or medical advice. If you are experiencing distress or are concerned about your mental health, please consult with a licensed mental health professional or healthcare provider.