The Anatomical and Evolutionary Impact of Pain, Pleasure, Motivation, and Cognition: Integrating Energy Metabolism and the Mind–Body BERN (Behavior, Exercise, Relaxation, and Nutrition) Framework

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  Figure 1. Evolutionary events that unfolded during the earliest stages of the Universe laid the foundations for life on Earth. Evidence of these events remains in the form of primordial molecules that have been detected on asteroids traveling in our solar system. Our current understanding suggests that the Earth maintained uniquely stable and hospitable thermodynamic conditions that facilitated further growth. Alkaline thermal vents provided the necessary energy needed by molecular fragments (for example, early nucleic acids) to combine and evolve. Environmental phase differences facilitated the formation of coacervate-like droplets containing RNA and environmental DNA (eDNA, i.e., extracellular DNA that can be detected in the environment), eventually giving rise to primitive membranes. Membrane development represented a critical advance, as these structures promote molecular stability and thus may facilitate efficient and rapid evolution, leading to the emergence of viral and prokaryotic life forms. Oxygen, a highly reactive and potentially toxic molecule, became a central focus after the development of organisms capable of photosynthesis. Ultimately, several bacterial species evolved the…

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  Figure 2. Mitochondria contribute to both energy production and oxygen detoxification processes that support the evolution of diverse eukaryotic cells as well as complex multicellular organisms. Energy availability, a critical factor leading to the evolution of complex life forms [56,57], most likely facilitated the development of interconnected neural networks that shape behaviors and responses essential for survival, including pleasure, pain perception, and cognition. These networks include the Reward Network, a CNS pathway that includes the ventral tegmental area, nucleus accumbens, and prefrontal cortex), the Pain Network (including the anterior cingulate cortex, insula, thalamus, and somatosensory cortex), and the Executive Network (including the lateral prefrontal cortex, posterior parietal cortex, frontal eye fields, and the dorsomedial prefrontal cortex). Interactions between these networks provide multicellular organisms with functional advantages when novel adaptive behaviors and survival strategies are needed.

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  Figure 3. Mitochondria are integral protective and energy-generating cellular components that function continuously and consume oxygen (O2), thereby also reducing oxygen-related toxicity (i.e., oxidative stress); their capacity to sense and respond to O2 is a fundamental feature of eukaryotic life. Chronic disorders arise, at least in part, when mitochondria become incapable of efficient oxygen metabolism. HIF-1-mediated hypoxia is a critical trigger of inflammation, neurodegeneration, and mitochondrial dysfunction [69,70]. These broad-reaching observations reinforce the essential role of oxygen homeostasis in maintaining health and well-being. The Behavior, Exercise, Relaxation, and Nutrition (BERN) framework highlights several essential tools that may be used to optimize mitochondrial efficiency and resilience. Life is typically defined by an organism’s ability to grow, reproduce, respond to stimuli, metabolize, and maintain internal stability. Both viruses and mitochondria display many of these traits, extending the definition of what might be considered truly alive. Viruses can replicate under specific conditions, influence cellular metabolism, and evolve rapidly by adapting to their…